MIMO receiving signal detection method and receiving apparatus

Abstract

The invention relates to the wireless communication field, and discloses a multi-input and multi-output receiving signal detection method and a receiving device, so that the system can flexibly come to a compromise between the complexity of a detection algorithm and good BER performance. As for the sub-flow with better signal quality, a detection algorithm with lower complexity is adopted; and as for the sub-flow with poor signal quality, the detection algorithm with high BER performance is adopted, wherein, the preset threshold is one of the preset thresholds at two levels at least.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the multiple-input multiple-output technology. Background technique [0002] With the rapid development of high-speed network technology and multimedia technology, the development of wireless network is extremely rapid. The development trend of wireless network gradually evolves from circuit switching to packet switching, and various wireless broadband access technologies emerge in endlessly. [0003] Wireless networks that have developed rapidly in recent years include the third generation mobile communication system (The Third Generation, referred to as "3G"), local multipoint distributed service (Local Multipoint Distribution System / Service, referred to as "LMDS"), multipoint multichannel distributed Multi-channel Multi-point Distribution Service ("MMDS" for short) system technology and Worldwide Interoperability for Microwave Access ("WiMAX" for short). Research on post...

AI Technical Summary

Problems solved by technology

[0009] However, the inventors of the present invention found that among the detection algorithms in the MIMO system, the MLD detection algorithm has the best performance, but the complexity is high and it is not easy to implement

The simplified QRD detection algorithm based on MLD has performance close to the MLD detection algorithm, but the complexity is still high in high-order modulation

Therefore, if a linear detection algorithm (such as ZF-SIC, MMSE-SIC, etc.) is used, although the problem of high complexity is avoided, the bit error rate (Bit Error Rate, "BER") performance of the linear detection algorithm is poor, Moreover, part of the detection algorithm in the linear detection algorithm will also cause poor numerical stability; if the MLD or QRD detection algorithm is used, it will lead to a problem of high complexity

Since the receiving end usually uses a certain detection algorithm to detect each sub-stream in MIMO technology, the MIMO system cannot flexibly realize the compromise between the complexity of the detection algorithm and good BER performance

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