Multi-element error correcting code transmitting and receiving apparatus, data communication system and related method

Abstract

The invention discloses a multiple-unit error correcting code transmitting and receiving device and a data transferring system as well as related methods, which can be used for reducing the complexity of operation. The multiple-unit error correcting code transmitting device comprises a multichannel decoder, a symbol mapper, a user interleaver and a frequency amplifier, wherein the multichannel decoder is used for carrying out the multiple-unit coding on the source data frames of users to obtain a coding sequence; the symbol mapper is used for carrying out the symbol mapping on the coding sequence to obtain a symbol sequence; the user interleaver is used for interleaving the symbol sequence to obtain an interleaved sequence; and the frequency amplifier is used for carrying out the frequency amplifying on the interleaving sequence to obtain a frequency amplifying sequence. The invention also provides a multiple-unit error correcting code receiving device, a data transferring system and the related methods, and can effectively reduce the complexity of operation.

Description

technical field [0001] The invention relates to the field of data encoding and decoding, in particular to a multiple error correction code transmitting and receiving device, a data transmission system and related methods. Background technique [0002] There are multiple multiple access methods in existing communication systems, such as Code Division Multiple Access (CDMA, Code Division Multiple Access) and Interleave Division Multiple Access (IDMA, Interleave Division Multiple Access). The so-called CDMA refers to the use of different users. Different spreading codeword sequences transmit information; the so-called IDMA means that different users use different interleavers to transmit information. [0003] CDMA technology uses forward error correction coding (FEC, Forward ErrorCorrection) cascaded with spread spectrum operation at the transmitter. From the perspective of channel coding theory, spread spectrum operation does not obtain coding gain; while IDMA technology uses ...

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Problems solved by technology

[0011] First of all, binary codes are used for data transmission in the prior art, but the error correction performance and burst error resistance of binary codes are not strong;

[0012] Secondly, in the transmitter scheme of the prior art, the coded bit data is mapped to symbol data for transmission after being passed through a frequency spreader and an interleaver. Since the number of unit data of bit data is more than that of symbol data, the spreading The frequency converter and the interleaver need to carry out a large number of calculations, so the calculation complexity is high in the prior art;

[0013] Again, in the receiver scheme of the prior art, since the prior art uses binary codes for data transmission, that is, the binary decoder can only recognize bit probability information, so the receiver calculates the symbol sequence after receiving the symbol sequence After the symbol probability information of the sequence, the symbol probability information must be converted into bit probability information before it can be sent to the binary decoder for processing. Similarly, the output of the binary decoder is also bit probability information. To iterate, it is also necessary to convert the bit probability information It is then converted into symbol probability information, so in the case of high-order modulation, the receiver needs to frequently convert between symbol probability and bit probability, and the computational complexity is high;

[0014] In addition, when converting between symbol probability and bit probability, information will be lost, thereby losing part of the coding gain and affecting system performance

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