Decoding method and apparatus for realizing multiple antenna interfering signal separation

Abstract

The invention relates to a method for using multi-antenna to receive and decode signal, and relative device. Wherein, it is characterized in that: iteratively decoding the receiving signal with disturb signal received by antenna; summing and averaging the likelihood ratio of treated information bit, to obtain the likelihood ratio of information bit; and in the iterative decoding process, it also combines the external information to obtain the prior information needed in next iterative decoding process. Therefore, the invention can fully use multi-sender antenna to improve the frequency spectrum utilization, to confirm the decoding property of MIMO system.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a decoding method and device for realizing the separation of multi-antenna interference signals. Background technique [0002] The high-speed development of Internet and mobile communication shows that there is potentially huge demand for high-speed wireless data services. Multi-transmission and multiple-reception antenna array (MIMO) can effectively improve the spectrum utilization of the channel. However, in order to achieve high-speed data transmission (BLAST) in the MIMO structure, the reliability of the system must be reduced due to signal interference, and at the same time, the reliability of data transmission must be reduced due to the introduction of space-time correlation (STBC). . Therefore, the cascaded structure of channel coding and MIMO space-time hierarchy can benefit from both reliability and efficiency. [0003] The existing Turbo coding...

AI Technical Summary

Problems solved by technology

Among them, interference detection generally adopts space-time decoding (such as STBC) or space-time layered (such as BLAST) decoding, and then orthogonal STBC needs two-dimensional correlation of space and time to ensure the orthogonality of space-time codewords, reducing The channel utilization rate is improved, and the coding with a code rate other than 1 causes a waste of frequency band

[0005] In addition, BLAST layered decoding generally implements interference detection based on ZF (zero-forcing) or MMSE (minimum mean square error) criteria, and requires at least the same number of receiving antennas as the number of transmitting antennas, thus constraining the characteristics of MIMO and the performance of interference detection. poor performance

Therefore, in the structure of cascade processing, the performance of interference detection has a great influence on the performance of Turbo decoding, which limits the performance of the receiver to the performance of interference detection and limits the advantages of Turbo soft information decoding.

[0006] Therefore, the decoding methods used in existing MIMO systems cannot guarantee good decoding performance

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