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    • 专利摘要:
    PURPOSE: A method and an apparatus for demodulating received signals in a CDMA base station receiving system having an antenna array are provided to improve the performance of demodulation by applying an optimum weight vector, calculated at the signal processing apparatus of a CDMA base station receiving system having an antenna array, to the operation processing of a walsh demodulation signal vector. CONSTITUTION: A CDMA base station receiving system having an antenna array weights a walsh demodulation signal vector, the output of a walsh demodulator, using a weight vector for the present snapshot and yields an array output signal corresponding to each walsh word. The system selects and provides an index having the maximum size among the output signals. Then the system updates a weight vector value for the received signal processing at the next snapshot using a walsh demodulation signal vector corresponding to the selected index.
    公开号:KR20020074601A
    申请号:KR1020010014468
    申请日:2001-03-20
    公开日:2002-10-04
    发明作者:안성수；최승원
    申请人:(주)한텔；
    IPC主号:
    专利说明:

    Received signal duplication method and apparatus for signal division multiple access base station receiving system with antenna array {Signal Processing Method and Apparatus for CDMA System having Antenna Array}
    [4] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal reception processing technology of a base station receiving system having an array antenna operating in an IS-95 CDMA signal environment. A processing method and apparatus for demodulating a signal of a receiving system, and a computer-readable recording medium having recorded thereon a program for realizing the signal.
    [5] In the conventional CDMA base station reception system, since a demodulation technique using a single antenna is generally employed, there is a limit in reducing noise and interference effects due to impossibility of accurate demodulation, and there are also problems in improving communication quality.
    [6] On the other hand, in order to improve the call quality and increase the capacity of a wireless communication system, a method of providing an antenna array system for receiving a signal selectively in a wireless signal space has been proposed to improve the communication quality by reducing interference signals. Although some attempts were made to improve, accurate demodulation was not supported, and there was still a limit in reducing noise and interference effects.
    [7] The present invention is proposed to overcome the problems of the prior art as described above, the optimal weight vector calculated by the Signal Processing Apparatus of the CDMA base station receiving system having an antenna array It is an object of the present invention to provide a processing method for demodulating a signal of a CDMA base station receiving system, which is applied to the Walsh demodulation signal vector for arithmetic processing.
    [8] In addition, the present invention applies the optimal weight vector calculated by the Signal Processing Apparatus of the CDMA base station receiving system having the antenna array to the Walsh demodulated signal vector calculation processing to improve the demodulation performance. Another object is to provide a processing apparatus for demodulating a signal of a CDMA base station receiving system.
    [9] In addition, the present invention applies the optimal weight vector calculated by the Signal Processing Apparatus of the CDMA base station receiving system having the antenna array to the Walsh demodulated signal vector calculation processing to improve the demodulation performance. Another object is to provide a computer readable recording medium having recorded thereon a program for realizing a method of demodulating a signal of a CDMA base station receiving system.
    [1] 1 is a block diagram illustrating a processing procedure for demodulating received data for an nth antenna in a signal processing apparatus of a CDMA base station receiving system having N antenna arrays to which the present invention is applied.
    [2] 2 is a block diagram illustrating a received signal processing technique for demodulating received data using a weight vector in an IS-95 CDMA receiver according to an embodiment of the present invention;
    [3] 3 is a flow diagram of one embodiment of a processing method for demodulating a received signal in accordance with one preferred embodiment of the present invention.
    [10] The present invention provides a signal demodulation processing method of a CDMA base station receiving system having an antenna array, wherein the Walsh demodulator signal vector is a Walsh demodulator output { K = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. (k = 0, ....., 63)); (D) of the output signal {y 0 , y 2 , ..., y 63 } having the largest magnitude (│y D │≥│y k │, for k = 0, ...., 63) Selecting and providing a Walsh demodulation signal vector corresponding to the index D selected in the second step; The third step of updating the weight vector value for the received signal processing in the next snapshot by using a).
    [11] And after performing the third step to perform continuous communication, the fourth step of performing a receiving operation for the next snapshot using the index (D) found in the second step of the previous snapshot from the first step Characterized in that it further comprises.
    [12] Further, the Walsh demodulation signal vector { } Is a total of 64 N x 1 vectors in the N antenna elements by mounting the 64 Walsh demodulators for each channel connected to each antenna element of the antenna array system including the N antenna elements.
    [13]
    [14] (Where N is the number of antenna elements of the array antenna, Is a Walsh demodulation signal corresponding to the i th Walsh number in the j th antenna, and is a received signal which has undergone the despreading and Walsh demodulation process.
    [15] The third step may further include a fifth step of decoding the index D into a predetermined bit signal using the index D selected in the second step; And a Walsh demodulation signal vector corresponding to the selected index (D). Weight vector for processing the received signal of the next snapshot using The Walsh demodulation signal vector corresponding to the index D obtained in the second step is 64 Walsh demodulation signals obtained after Walsh demodulation. (7) updating the autocorrelation matrix in the current snapshot using < RTI ID = 0.0 > And an eighth step of determining, as a weight vector, an eigenvector corresponding to the maximum eigenvalue of the updated autocorrelation matrix.
    [16] In the sixth step, the received signal vector before despreading is used as the weight vector in the current snapshot. The Walsh signal vector, which is a received signal that has undergone a weighting and despreading process, ) Is a weight vector that maximizes the ratio of the size of the weight vector to the weight vector ( ) To obtain. And, the weight vector ( ) Is the weight vector in the current snapshot, and the received signal vector before despreading. The Walsh signal vector, which is a received signal that has undergone an average and despreading process Is the ratio of the mean of the weighted weights to the weight vector. Is an average of ·).
    [17] In order to achieve the second object, the present invention provides a signal demodulation processing apparatus of a CDMA base station receiving system having an antenna array, wherein the Walsh demodulation signal vector is a Walsh demodulator output { K = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. array output signal calculating means for calculating ( k = 0, ..... 63); The largest of the output signals {y 0 , y 2 ,..., Y 63 } of the array output signal calculating means (│ y D │≥│ y k │, for k = 0, ...., 63) maximum size index selection means for selecting and providing an index D : and a Walsh demodulation signal vector corresponding to the index D selected by the maximum size index selection means ( Weight vector updating means for updating the weight vector value for the received signal processing in the next snapshot by using < RTI ID = 0.0 >
    [18] Further, in the array output signal calculating means, a Walsh demodulation signal vector { } Is a total of 64 N x 1 vectors in the N antenna elements by mounting the 64 Walsh demodulators for each channel connected to each antenna element of the antenna array system including a total of N antenna elements.
    [19]
    [20] (Where N is the number of antenna elements of the array antenna, Is a Walsh demodulation signal corresponding to the i th Walsh number in the j th antenna, which is a received signal that has undergone the despreading and Walsh demodulation process.
    [21] The weight vector updating means may further comprise decoding means for decoding the index D into a predetermined bit signal using the index D selected by the index selecting means; And a Walsh demodulation signal vector corresponding to the selected index D ( Weight vector for processing the received signal of the next snapshot using And Walsh demodulation signal vector corresponding to the index D obtained in the second step of the 64 Walsh demodulation signals obtained after Walsh demodulation. Means for updating the autocorrelation matrix in the current snapshot using; And means for determining an eigenvector corresponding to the maximum eigenvalue of the updated autocorrelation matrix as a weight vector.
    [22] The update processing means is a received signal vector before despreading with a weight vector in the current snapshot. The Walsh signal vector, which is a received signal that has undergone a weighting and despreading process, ) Is a weight vector that maximizes the ratio of the size of the weight vector to the weight vector ( ), And the weight vector ( ) Is the weight vector in the current snapshot, and the received signal vector before despreading. The Walsh signal vector, which is a received signal that has undergone an average and despreading process Is the ratio of the mean of the weighted weights to the weight vector. Is an average of ·).
    [23] On the other hand, the present invention is provided in a code division multiple access (CDMA) base station receiving system employing an antenna array in order to achieve the third object, and is a Walsh demodulator output to a receiving signal demodulation processing apparatus having a microprocessor. The Walsh demodulation signal vector { = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. (k = 0, ....., 63)); The output signal of the size of the {y 0, y 2, .... , y 63} up (│ y D │≥│ y k │ , for k = 0, ...., 63) an index (D) The second function to select and provide a Walsh demodulation signal vector corresponding to the index ( D ) selected in the second function ( The present invention provides a computer-readable recording medium containing a program for realizing a third function of updating a weight vector value for processing a received signal in a next snapshot. Also, after performing the third function to perform continuous communication, a fourth function of performing a receiving operation for the next snapshot by using the index ( D ) found in the second function of the previous snapshot from the first function. To provide a computer-readable recording medium containing a program for further realizing the.
    [24] The above and other objects and features of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings.
    [25] 1 is a block diagram illustrating a processing procedure for demodulating received data for an nth antenna in a signal processing apparatus of a CDMA base station receiving system having N antenna arrays to which the present invention is applied. . FIG. 2 is a block diagram illustrating a received signal processing technique for demodulating received data using a weight vector in an IS-95 CDMA receiver according to an embodiment of the present invention.
    [26] As shown in the figure, a low-pass filtering, despreading, and Walsh demodulation process of a signal incident to an antenna array operating in a CDMA signal environment such as IS-95 CDMA is performed. The data is demodulated correctly during the process.
    [27] The core of the demodulation technique according to the present invention is a signal output from the Walsh demodulator at the receiving end, that is, a Walsh demodulation signal vector having 64 Walsh indices (6 in FIG. 1) { } To find the Walsh index to be actually transmitted, and to accurately extract the Walsh demodulation signal vector corresponding to the index.
    [28] More specifically, the technique of the present invention may be described in detail. A Walsh demodulation signal vector output from 64 Walsh demodulators { For k = 0, ....., 63} Each angle is a weight vector in the current snapshot Weighted to generate 64 output signals, i.e. { y k | for k = 0, ....., 63}.
    [29] The 64 output signals { y k } are input to the maximum size selector 8 of FIG. 1 and the Walsh index D ( D = 0 or D = 1 or ..... .. D = 63). The information finally determined through the maximum size selector 8 (i.e., index D ) is restored to 6-bit Walsh word information in the decoder unit (9 in FIG. 1).
    [30] The present invention proposes a method of applying to a CDMA environment such as IS-95 using an antenna array system. In other words, the antenna array is used to improve Walsh demodulator performance of the IS-95 CDMA system. In order to improve the accuracy of the Walsh demodulator, that is, to accurately demodulate the Walsh demodulation signal vector transmitted from a desired terminal, a method of calculating an optimal weight vector of the antenna array system is proposed. In other words, a signal processing unit (Signal Processing Apparatus) (7 of Figure 1) proposes a preferred method for calculating the weight vector.
    [31] The IS-95 CDMA antenna array reception demodulation technique proposed by the present invention is a new application technique, and unlike the demodulation technique in the existing reception system, accurate Walsh demodulation is possible using a weight vector. This will be described in more detail with reference to the drawings.
    [32] As described above, Figure 1 shows the IS-95 receiver demodulation procedure proposed in the present invention. 1 is a block diagram illustrating data processing for a signal received at an n- th antenna element among N antenna elements, and the basic signal processing procedures described herein include JS Lee, and LE Miller, "CDMA System Engineering Habdbook", Archtech House, 1998, pp750-757.
    [33] Signals received at the antenna array (1 in FIG. 1) are low pass filtering (2 in FIG. 1), PN code despreading (3, 4 in FIG. 1) and Walsh demodulation ( The signal after 5) of FIG. 1 is referred to as a Walsh demodulation signal.
    [34] If the number of antenna elements in the antenna array is N, the Walsh demodulation signal vector corresponding to the k th Walsh word among the 64 Walsh words in total. (Nx1) can be written as Equation 1 below.
    [35] [Equation 1]
    [36]
    [37] Thus, a total of 64 (Nx1) Walsh demodulation signal vectors are shown in FIG. } Is expressed as:
    [38] Walsh demodulation signal vectors corresponding to each Walsh word, i.e. { For k = 0, ....., 63} is a weight vector output from the signal processor 7 of FIG. And the output of the antenna array system is obtained as shown in Equation 2 below.
    [39] [Equation 2]
    [40]
    [41] Walsh demodulation signal vector And weight vector In order to express the weight of the in more detail is shown in FIG.
    [42] 2 shows a Walsh demodulation signal vector having 64 Walsh indices. To explain the process of weighting the output signal, 64 output signal y k values calculated in Equation 2 are input to the maximum size selector 8 of FIG. 1 to obtain the largest output value of 64. You will find The output of the maximum size selecting section 8 is the index of { y k } having the largest size among 64 { y k | k = 0, ..., 63}.
    [43] Select the maximum size selecting section 8 as in Figure 1, i.e., (│ y D │≥│ y k │, for k = 0, ...., 63) D in the second index D is 64 Walsh index It means that the size of the output y D of the antenna array system is the largest.
    [44] Using the index D selected by the maximum size selector 8 of FIG. 1, the decoder 9 restores the 6-bit binary number through the decoder 9. Six-bit data in binary is subjected to processes such as deinterleaving and Viterbi decoding according to the known IS-95 standard.
    [45] Further, 64 Walsh demodulation signal vectors are obtained by using the output D of the maximum size selector 8. Is selected and input to the signal processing unit 7 of FIG. 1 to apply the weight vector to be applied in the next snapshot. It is used to update.
    [46] The weight vector updated through the above process is the Walsh demodulation signal vector in the next snapshot. And a new output signal y k is inputted to the maximum size selector 8. This series of steps is repeated for each snapshot.
    [47] As shown in the drawing The input signal of the PN despreader can be written as
    [48] [Equation 3]
    [49]
    [50] Where r p, n is the despread signal received by the n- th antenna.
    [51] The signal before despreading Is despread by the despreader and 64 vectors {by the Walsh demodulator { }. Is a vector correlated with the k th Walsh code and is constructed as follows.
    [52] [Equation 4]
    [53]
    [54] Walsh demodulation signal vector corresponding to the k th Walsh index Is the weight vector calculated by the signal processor 8. Multiplied by (see FIG. 2), an output signal { y k | k = 0,1, ..., 63} is generated.
    [55] The 64 output signals { y k } find the index of the largest value among the 64 output signals { y k } through the maximum size discriminator. From index D above Can be selected.
    [56] 3 is a flowchart illustrating a method of processing a received signal according to an exemplary embodiment of the present invention. It shows the whole process of demodulating data using.
    [57] That is, a process of filtering the carrier frequency (frequency down conversion) and making the A / D-converted received signal more accurate data demodulation using a weight vector after Walsh demodulation is proposed.
    [58] An example of the processing steps for the demodulation method of the received signal data of the IS-95 CDMA receiver is as follows.
    [59] <Step 1>: Walsh demodulation signal vector obtained from a total of N antenna channels (after frequency low-pass transition, PN despreading, and Walsh demodulation process) K = 0, ...., 63}. K is the Walsh word index.
    [60] <Step 2>: The 64 Walsh demodulation signal vectors { } Weight vector for the current snapshot Array output using (initial setting at initial run, weight value updated at previous snapshot at subsequent run) (for k = 0, ...., 63) is generated (31).
    [61] &Lt; Step 3 &gt;: The largest value | y D | of the 64 output signals { y k } is determined, and the Walshword index D corresponding to the maximum size is selected (33). That is, | Y D | means the largest output signal of 64 (| y D | ≥ | y k |, for k = 0, ...., 63).
    [62] <Step 4>: Decode D into a 6-bit signal using the index D selected in Step 3. In addition, the 6-bit data restored to the 6-bit binary through the decoding process is subjected to the process of deinterleaving (Viterbi Decoding), such as deinterleaving (Viterbi Decoding) according to the known IS-95 standard (35).
    [63] <Step 5>: Walsh demodulation signal vector corresponding to the value of the index D selected in step 3 The signal processor (see 7 in FIG. 1) is used to update the weight vector value.
    [64] <Step 6>: Return to "Step 1" to perform continuous communication and repeat the reception operation in the next snapshot.
    [65] On the other hand, the control procedure of the received signal processing method according to the present invention can be implemented in software, the software RAM, ROM, CD-ROM, hard disk, floppy disk, magnetic tape of a computing system having a microprocessor It will be apparent to those skilled in the art that the present invention can be stored in various recording media.
    [66] So far, the technical idea of the present invention has been described with reference to specific examples, which are intended to help understanding, and those of ordinary skill in the art to which the present invention pertains have various aspects without departing from the technical idea of the present invention. As the substitution, modification and change are possible, the present invention is not limited to the above-described embodiment and the accompanying drawings.
    [67] According to the present invention, the base station receiving system employs an antenna array to selectively receive a signal in a wireless signal space, and at the same time, an optimal weight vector calculated by a signal processing apparatus is obtained from the Walsh demodulated signal vector. By applying to arithmetic processing to achieve accurate demodulation function, it has an excellent effect of improving the communication quality and communication capacity through the reduction of noise and interference signals.
    权利要求:
    Claims (17)
    [1" claim-type="Currently amended] A received signal demodulation processing method of a code division multiple access method (CDMA) base station receiving system having an antenna array,
    Walsh demodulator output Walsh demodulation signal vector { K = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. ( k = 0, ....., 63));
    The output signal of the size of the {y 0, y 2, .... , y 63} up (│ y D │≥│ y k │ , for k = 0, ...., 63) an index (D) Select and provide a second step: and
    The Walsh demodulation signal vector corresponding to the index D selected in the second step ( The third step of updating the weight vector value for the received signal processing in the next snapshot using
    Receiving signal demodulation processing method of a CDMA base station receiving system comprising an antenna array.
    [2" claim-type="Currently amended] The method of claim 1,
    A fourth step of performing a reception operation on a next snapshot using the index ( D ) found in the second step of the previous snapshot from the first step after performing the third step to perform continuous communication;
    The reception signal demodulation processing method of a CDMA base station receiving system further comprising an antenna array.
    [3" claim-type="Currently amended] The method according to claim 1 or 2,
    Walsh demodulation signal vector in the first step { } Is a total of 64 N x 1 vectors in the N antenna elements by mounting the 64 Walsh demodulators for each channel connected to each antenna element of the antenna array system including a total of N antenna elements.

    (Where N is the number of antenna elements of the array antenna, Is a Walsh demodulation signal corresponding to the i th Walsh number in the j th antenna and is a received signal that has undergone the despreading and Walsh demodulation process.
    Receive signal demodulation processing method of a CDMA base station receiving system having an antenna array, comprising a.
    [4" claim-type="Currently amended] The method of claim 1 or 2, wherein the third step is
    A fifth step of decoding the corresponding index D into a predetermined bit signal using the index D selected in the second step; And
    Walsh demodulation signal vector corresponding to the selected index D ( Weight vector for processing the received signal of the next snapshot Sixth step to update)
    Receiving signal demodulation processing method of a CDMA base station receiving system comprising an antenna array.
    [5" claim-type="Currently amended] The method of claim 4, wherein the sixth step is
    Walsh demodulation signals obtained after Walsh demodulation. Walsh demodulation signal vectors corresponding to the index D obtained in the second step. (7) updating the autocorrelation matrix in the current snapshot using &lt; RTI ID = 0.0 &gt; And
    An eighth step of determining an eigenvector corresponding to the maximum eigenvalue of the updated autocorrelation matrix as a weight vector
    Receiving signal demodulation processing method of a CDMA base station receiving system comprising an antenna array.
    [6" claim-type="Currently amended] The method of claim 4, wherein the sixth step is
    Received signal vector before despreading with weight vector in current snapshot The written signal vector, which is a received signal that has undergone a weighted magnitude and a despreading process, ) Is a weight vector that maximizes the ratio of the size of the weight vector to the weight vector ( Receiving signal demodulation processing method of a CDMA base station receiving system having an antenna array.
    [7" claim-type="Currently amended] The weight vector of claim 6, ),
    Received signal vector before despreading with weight vector in current snapshot The Walsh signal vector, which is a received signal that has undergone an average and despreading process Is the ratio of the mean of the weighted weights to the weight vector. Is a mean value of ).
    [8" claim-type="Currently amended] The method according to claim 1 or 2,
    The CDMA base station receiving system is an IS-95 CDMA base station receiving system, characterized in that the received signal demodulation processing method of a CDMA base station receiving system having an antenna array.
    [9" claim-type="Currently amended] A received signal demodulation processing apparatus for a code division multiple access method (CDMA) base station receiving system having an antenna array,
    Walsh demodulator output Walsh demodulator signal vector { K = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. array output signal calculating means for calculating ( k = 0, ..... 63);
    The largest of the output signals { y 0 , y 2 ,..., Y 63 } of the array output signal calculating means (│ y D │≥│ y k │, for k = 0, 63) maximum size index selection means provided by selecting an index D : and
    The Walsh demodulation signal vector corresponding to the index D selected by the maximum size index selecting means ( Weight vector updating means for updating the weight vector value for the received signal processing of the next snapshot by using &quot;
    Receiving signal demodulation processing apparatus of a CDMA base station receiving system comprising an antenna array.
    [10" claim-type="Currently amended] 10. The apparatus according to claim 9, wherein in said array output signal calculating means,
    Walsh demodulation signal vector { } Is a total of 64 N x 1 vectors in the N antenna elements by mounting the 64 Walsh demodulators for each channel connected to each antenna element of the antenna array system including a total of N antenna elements.

    (Where N is the number of antenna elements of the array antenna, Is a Walsh demodulation signal corresponding to the i th Walsh number in the j th antenna and is a received signal that has undergone the despreading and Walsh demodulation process.
    Receiving signal demodulation processing apparatus of a CDMA base station receiving system having an antenna array, comprising a.
    [11" claim-type="Currently amended] The method of claim 9, wherein the weight vector updating means,
    Decoding means for decoding the corresponding index D into a predetermined bit signal using the index D selected by the index selecting means; And
    Walsh demodulation signal vector corresponding to the selected index D ( Weight vector for processing the received signal of the next snapshot using Update processing means for updating
    Receiving signal demodulation processing method of a CDMA base station receiving system comprising an antenna array.
    [12" claim-type="Currently amended] The method of claim 11, wherein the update processing means,
    Walsh demodulation signals obtained after Walsh demodulation. Walsh demodulation signal vectors corresponding to the index D obtained in the second step. Means for updating the autocorrelation matrix in the current snapshot using; And
    Means for determining an eigenvector corresponding to the maximum eigenvalue of the updated autocorrelation matrix as a weight vector
    Receiving signal demodulation processing apparatus of a CDMA base station receiving system comprising an antenna array.
    [13" claim-type="Currently amended] The method of claim 11, wherein the update processing means,
    Received signal vector before despreading with weight vector in current snapshot The Walsh signal vector, which is a received signal that has undergone a weighting and despreading process, ) Is a weight vector that maximizes the ratio of the size of the weight vector to the weight vector ( Receiving signal demodulation processing apparatus of a CDMA base station receiving system having an antenna array.
    [14" claim-type="Currently amended] 12. The apparatus of claim 11, wherein the weight vector ),
    Received signal vector before despreading with weight vector in current snapshot The Walsh signal vector, which is a received signal that has undergone an average and despreading process Is the ratio of the mean of the weighted weights to the weight vector. Is a mean value of ). The apparatus for demodulating a received signal of a CDMA base station receiving system having an antenna array.
    [15" claim-type="Currently amended] The method of claim 9,
    The CDMA base station receiving system is an IS-95 CDMA base station receiving system, characterized in that the received signal demodulation processing apparatus of a CDMA base station receiving system having an antenna array.
    [16" claim-type="Currently amended] In a CDMA base station receiving system employing an antenna array, a received signal demodulation processing apparatus including a microprocessor,
    Walsh demodulator output Walsh demodulator signal vector { K = 0, ....., 63} for the current snapshot To the array output signal corresponding to each Walsh word. ( k = 0, ....., 63));
    The output signal of the size of the {y 0, y 2, .... , y 63} up (│ y D │≥│ y k │ , for k = 0, ...., 63) an index (D) To provide a second feature: and
    A Walsh demodulation signal vector corresponding to the index D selected in the second function; Third function of updating the weight vector value for the received signal processing in the next snapshot by using
    A computer-readable recording medium containing a program for realizing the problem.
    [17" claim-type="Currently amended] The method of claim 16,
    A fourth function of performing a reception operation on a next snapshot using the index ( D ) found in the second function of the previous snapshot from the first function after performing the third function to perform continuous communication;
    A computer-readable recording medium containing a program for further realizing the function.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2001-03-20|Application filed by (주)한텔
    2001-03-20|Priority to KR1020010014468A
    2002-10-04|Publication of KR20020074601A
    优先权:
    申请号 | 申请日 | 专利标题
    KR1020010014468A|KR20020074601A|2001-03-20|2001-03-20|Signal Processing Method and Apparatus for CDMA System having Antenna Array|
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