Serial interference cancellation and detection method and system for multi-antenna bit interleaved coding system

Abstract

The invention relates to a serial interference cancellation and detection method and system for a multi-antenna bit interleaved coding system. The system disclosed by the invention comprises an MMSE (Minimum Mean Square Error) equalization filter module, a post-detection signal-to-noise ratio computing module, a sequencing module, a data channel section module, a soft demodulation module, a data revaluation module, an interference cancellation module, a residual interference estimation module, a similar MMSE equalization filter module, a similar post-detection signal-to-noise ratio computing module and a judgment module. According to the method and the system, the technical problem that the residual interference of 'eliminated' interference is considered to be zero existing in the conventional serial interference cancellation method is solved. In the invention, a correct flow device is provided for an MMSE serial interference cancellation method, a residual interference estimation method is further provided, and a correct form for estimating the MMSE of data in residual layers and a corresponding computation form of a post-detection signal-to-noise ratio used in the presence of 'residual interference' are provided.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an interference cancellation detection technology for multi-layer data in a multiple-transmit multiple-receive antenna system (MIMO). Background technique [0002] The multiple-input multiple-output wireless communication system can use space multiplexing to simultaneously transmit multiple layers of data in the same frequency domain resource, thereby increasing the system capacity of the wireless communication system. However, in the detection process, the ability of the detection of each layer of data to suppress the interference from data transmitted by other transmitting antennas has a significant impact on system performance. The minimum mean square error (MMSE) method is a commonly used detection method at the receiving end. The present invention adds a soft decision serial interference cancellation detection method and system on the basis of the minimum mean square er...

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Problems solved by technology

[0004] In order to solve the technical problem existing in the existing serial interference cancellation method that the "eliminated" interference is often regarded as zero residual interference, the present invention provides a serial interference cancellation detection method and detection system based on a multi-antenna bit interleaving coding system , which is applicable to the case where multiple antennas are respectively configured at the transmitting end and the receiving end in wireless communication, it not only provides the correct flow device of the minimum mean square error serial interference cancellation method, but also provides a method for estimating residual interference, and also provides an existing In the case of "residual interference", the correct form of the minimum mean square error estimation of the remaining layer data, and the corresponding calculation form of the post-detection signal-to-noise ratio

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