• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    PURPOSE: A device for transmitting data of a mobile communication system is provided to selectively turn on/off transmission power of a multiple access and multi-carrier communication system, thereby compensating for damage on a channel. CONSTITUTION: A block encoder(10) performs a block encoding process including an error correction code for data to be transmitted. An interleaver(20) performs an interleaving process to prevent an error on a channel for the block-encoded data. A parallel/serial converter(30) separates the interleaved parallel data by each serial bit, and outputs the separated data to a sub channel. A modulating block(40) consists of many modulators(40a-40n) for modulating and outputting each of the sub channel data, respectively. An amplifying block(50) consists of many amplifiers(50a-50n) for amplifying and outputting the outputted data.
    公开号:KR20030084504A
    申请号:KR1020020023264
    申请日:2002-04-27
    公开日:2003-11-01
    发明作者:김직동
    申请人:엘지전자 주식회사；
    IPC主号:
    专利说明:

    DATA TRANSMISSION APPARATUS AND METHOD FOR MOBILE COMMUNICATION SYSTEM}
    [11] The present invention relates to an apparatus and method for transmitting and receiving data in a mobile communication system, and in particular, by selectively turning on / off transmission power in a multiple access multi-carrier communication system, thereby preventing damage caused from a channel. The present invention relates to an apparatus and method for transmitting and receiving data in a mobile communication system.
    [12] As a method for compensating for damage occurring from a conventional channel, it is common to use a power control method or an error correction codes method separately.
    [13] Therefore, in the related art, since there is no method that can compensate for the shortcomings of each method, it is difficult to expect further performance improvement in the transmission apparatus of the mobile communication system.
    [14] Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and by selectively turning on / off transmission power in a multiple access multi-carrier communication system, It is an object of the present invention to provide an apparatus and method for transmitting and receiving data in a mobile communication system, which can compensate for damage.
    [15] The present invention for achieving the above object is a block encoder for encoding the data to be transmitted to the transmission block to the "Q-ary" including the error correction code; An interleaver for interleaving the block encoded data for error prevention on a channel; A parallel / serial converter for separating the interleaved parallel Q-ary data for each bit of the serial and outputting the data to a sub channel; A modulator comprising a plurality of modulators for modulating and outputting the respective subchannel data; A demodulator comprising a plurality of demodulators configured to include an amplifier comprising a plurality of amplifiers for power amplifying and outputting the output data of each modulator, and a demodulator configured to demodulate data received through each subchannel in a receiver; A serial / parallel converter for converting the demodulated subchannel data for each bit into parallel “Q-ary” data; A deinterleaver for deinterleaving the Q-ary data; And a block decoder for restoring transmission data by performing an erase error correction technique on the symbol data erased from the deinterleaved data.
    [16] In addition, the present invention includes a first step of detecting a gain of each sub-channel for the transmission data in the transmitter; Gain of each sub-channel is a predetermined reference value ( A second step of comparing with); Any one of the subchannels has a predetermined reference value ( A third step of erasing the symbol without transmitting data by turning off power; All of the subchannels have a predetermined reference value ( And a fourth step of transmitting data at a predetermined fixed power, and detecting a gain of each subchannel with respect to the data received by the receiving unit. Gain of each sub-channel is a predetermined reference value ( A second step of comparing with); Any one of the subchannels has a predetermined reference value ( A third step of determining that erasing has been performed for the corresponding data symbol if less than; If there is data erased by the determination, it is characterized in that the fourth step of decoding the received data by the erase error correction technique.
    [1] 1 is a block diagram showing the configuration of a transmitter in a mobile communication system according to the present invention.
    [2] 2 is a flowchart illustrating a data transmission process according to FIG. 1.
    [3] 3 is a block diagram showing the configuration of a receiver in a mobile communication system according to the present invention;
    [4] 4 is a flowchart illustrating a data receiving process according to FIG. 3.
    [5] *** Description of the symbols for the main parts of the drawings ***
    [6] 10: block encoder 20: interleaver
    [7] 30: parallel / serial converter 40: modulator
    [8] 50: amplifier 60: demodulator
    [9] 70: serial / parallel converter 80: deinterleaver
    [10] 90: block decoder
    [17] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    [18] Many specific details, such as specific processing flows, are set forth in the following description in order to provide a more general understanding of the invention, and it is understood that the invention may be practiced without these specific details. Will be self-evident.
    [19] In addition, detailed description of well-known functions and structures which are determined to unnecessarily obscure the subject matter of the present invention will be omitted.
    [20] 1 is a block diagram showing the configuration of a transmitter in a mobile communication system according to the present invention, in which a block encoder encodes data to be transmitted by Q-ary (bits may be configured differently according to a system) including an error correction code. (10), the interleaver 20 interleaving the block encoded data for error prevention on the channel, and the interleaved parallel Q-ary data for each bit of the serial A modulator 40 comprising a parallel / serial converter 30 for outputting a sub channel, a plurality of modulators 40a to 40n for modulating and outputting the respective subchannel data, and each of the modulators 40a And amplification unit 50 including a plurality of amplifiers 50a to 50n for power amplifying and outputting the output data of ˜40n).
    [21] In the apparatus configured as described above, the present invention detects the gain of each sub-channel as shown in the flowchart of FIG. 2 (S101), and the value is a predetermined reference value ( If greater than (S102), the amplification unit 50 is maintained in the ON (ON) state and transmitted to a fixed power (P) (S103), a predetermined reference value ( ), The amplifier 50 is turned off (S104), and data is not transmitted (at this time, power is '0') and the corresponding Q-ary symbol is erased (S105).
    [22] Of course, in order to transmit the on / off control and erasure information of the amplifying unit 50 to the receiving unit, a control unit must be further included, but in general, the operation can be easily performed by changing the software of the control unit included in the mobile communication system. As it is possible, it is not shown in the said structure of this invention.
    [23] In addition, the erasing information may be implemented in various ways, such as transmitting to a receiving unit through a separate channel, and the description thereof will be omitted because the method deviates from the gist of the present invention.
    [24] However, in the exemplary embodiment of the present invention, if the gain of the received subchannel is detected and any of the channel gains is less than or equal to a predetermined reference value, the erase error correction technique is determined by determining that the corresponding Q-ary symbol is erased. To restore the data.
    [25] On the other hand, various detection methods have already been disclosed regarding the method for detecting (predicting) the channel gain of each channel for turning on / off the amplification unit. You will be able to detect the gain.
    [26] Therefore, in the present invention, when the channel gain detected for each sub-channel becomes less than a predetermined reference value in any one channel, the power is turned off by erasing the corresponding Q-ary symbol without transmitting data by transmitting power. It is possible to save battery consumption, and to facilitate recovery by erasing information in the block decoder of the receiver.
    [27] That is, in the conventional case, since data is transmitted at a fixed power unconditionally regardless of the state of a channel, it is virtually difficult to recover when more than a predetermined number of errors occur in the receiver. However, in the present invention, when an error is likely to occur, the corresponding symbol is erased. By transmitting the information to the receiver to recover the information, the transmission and reception performance is improved.
    [28] 3 is a block diagram showing a configuration of a receiver in a mobile communication system according to the present invention, wherein a demodulator 60 comprising a plurality of demodulators 50a to 50n respectively demodulates data received through each subchannel, and A serial / parallel converter 70 for converting the demodulated subchannel data for each bit into parallel Q-ary data, a deinterleaver 80 for deinterleaving the Q-ary data, and erasing the deinterleaved data. And a block decoder 90 for restoring the transmission data by performing an erase error correction technique on the received symbol data.
    [29] In the apparatus configured as described above, the present invention provides a predetermined reference value of any one of M (1, 2, ... M) subchannel gains as shown in the flowchart of FIG. If less than (S201, S202), it is determined that erasing (erasure) has been performed for the corresponding Q-ary symbol (S204), otherwise (when the gain of the M sub-channels are all predetermined reference value ( If larger than), the existing general demodulation is determined (S203), and the Q-ary block decoder 90 restores the data using erasure-error correction (S205).
    [30] In this case, the general demodulation means outputting only demodulation data of '1' and '0' to the decoder, and when there is erasure data, erase information (eg, 'E') data other than '1' and '0' is transmitted to the decoder. To be decoded accordingly.
    [31] As described above, the present invention can control the power on / off, thereby saving the transmission power in a bad channel situation, and since each user adjusts the transmission power independently of other users (the channel environment of each user is also independent) The average multiple access interference is also reduced.
    [32] In addition, when the symbol data is not transmitted due to a poor channel environment, there is a problem in that an error occurs in a corresponding symbol. In the present invention, an erasure-error correction method of an error correction code of a block code is used. By complementing, i.e., designating a symbol that does not transmit (i.e., a high probability of error) as an erase symbol (Erasure), it is possible to improve the block code correction capability in the block decoder of the receiver.
    [33] As described above, the erasing error correction scheme used in the present invention provides better reception performance than the conventional error-only correction scheme. In other words, the block code can be corrected even if twice the erase symbol is generated compared to the error, thereby improving the reception performance.
    [34] As described above, the apparatus for transmitting and receiving data of the mobile communication system of the present invention enables the error correction method by power control and erasure to be used in combination, thereby reducing the consumption of the transmitting battery and improving the receiving side restoring capability. This has the effect of improving the performance of the system.
    权利要求:
    Claims (4)
    [1" claim-type="Currently amended] A block encoder for block encoding the data to be transmitted into a 'Q-ary' including an error correction code;
    An interleaver for interleaving the block encoded data for error prevention on a channel;
    A parallel / serial converter for separating the interleaved parallel Q-ary data for each bit of the serial and outputting the data to a sub channel;
    A modulator comprising a plurality of modulators for modulating and outputting the respective subchannel data;
    And an amplifier comprising a plurality of amplifiers for power amplifying and outputting the output data of the respective modulators.
    [2" claim-type="Currently amended] A demodulator comprising a plurality of demodulators each demodulating data received through each subchannel;
    A serial / parallel converter for converting the demodulated subchannel data for each bit into parallel “Q-ary” data;
    A deinterleaver for deinterleaving the Q-ary data;
    And a block decoder for restoring transmission data by performing an erasing error correction technique on the symbol data erased from the deinterleaved data.
    [3" claim-type="Currently amended] Detecting a gain of each subchannel for transmission data;
    Gain of each sub-channel is a predetermined reference value ( A second step of comparing with);
    Any one of the subchannels has a predetermined reference value ( A third step of erasing the symbol without transmitting data by turning off power;
    All of the subchannels have a predetermined reference value ( And a fourth step of transmitting data with a predetermined fixed power.
    [4" claim-type="Currently amended] Detecting a gain of each subchannel with respect to the received data;
    Gain of each sub-channel is a predetermined reference value ( A second step of comparing with);
    Any one of the subchannels has a predetermined reference value ( A third step of determining that erasing has been performed for the corresponding data symbol when the following step is performed;
    And if there is data erased by the determination, decoding the received data by an erasure error correction technique.
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    同族专利:
    公开号 | 公开日
    KR100469425B1|2005-02-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-04-27|Application filed by 엘지전자 주식회사
    2002-04-27|Priority to KR10-2002-0023264A
    2003-11-01|Publication of KR20030084504A
    2005-02-02|Application granted
    2005-02-02|Publication of KR100469425B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR10-2002-0023264A|KR100469425B1|2002-04-27|2002-04-27|Data transmission apparatus and method for mobile communication system|
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