Data transmission method, system and related equipment

Abstract

The embodiment of the invention discloses a data transmission method, a data transmission system and related equipment and is applicable to the technical field of communication. According to the embodiment of the invention, in the process of continuously transmitting a random layer of data streams in correspondence to code words to be transmitted for two times, a sending end respectively maps the data streams to equivalent sub-channels of which the channel quality is sequenced at different positions and transmits data according to the channel quality sequencing information of at least two layers of equivalent sub-channels which carry the code words to be transmitted between the sending end and a receiving end, so in the data transmission process, the data are alternately transmitted between the equivalent sub-channels with different relative channel quality grades respectively in the retransmission process of the random layer of data streams in correspondence to the code words to be transmitted, the data are transmitted on the equivalent sub-channels with high or low channel quality, transmission of a plurality of layers of data streams in correspondence to the code words to be transmitted can be approximate in bit error rate, and the whole transmission accuracy of the data is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a data transmission method, system and related equipment. Background technique [0002] In the existing multiple-input multiple-output (Multiple-Input Multiple-Out-put, MIMO) system of wireless communication, both the transmitting end and the receiving end use multiple antennas, so that spatial multiplexing can be adopted to obtain a higher rate , thereby increasing the transmission rate. [0003] When performing data transmission in a MIMO system, the sender adds a cyclic redundancy check (Cyclic Redundancy Check, CRC) to the transmitted transmission block (Transmit Block, TB) to form a codeword (Codeword), and uses a precoding method to The formed codeword is mapped to the equivalent channel H between the transmitting antenna and the receiving antenna for transmission. The equivalent channel H may include multiple layers of equivalent sub-channels, and the number of la...

AI Technical Summary

Problems solved by technology

[0004] In the above-mentioned existing data transmission process, if a codeword is mapped to at least two layers of equivalent subchannels for transmission, the eigenvalues ​​or signal-to-noise ratio of these equivalent subchannels may be different, which will result in the same codeword At least two layers of equivalent sub-channels are unbalanced, thus corresponding to different bit error rates (Bit Error Rate, BER), which will eventually affect the overall transmission accuracy of the codeword

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