A multi-level mixing detection method and its device

Abstract

The invention relates to a multi-grade mixing checking method and a device. The method includes the steps of: estimating the value according to the channel and generating the preliminary sequence from user signals according to digital wave filtering rules; expanding the preliminary sequence peripherally for the combination of the sequence aggregate to be judged; traversing the aggregate and selecting the maximum likelihood sequence with user information according to the maximum likelihood principle and taking the sequence as the checking result; wherein, the device also sets a digital wave filter for pretreatment before the ML checker. The method and the device replace the direct MLSE treatment of user information with the result of digital wave filtering, thus greatly lowering the complication of MLSE arithmetic, being superior to digital wave filtering in performance, and ensuring the given performance gaining. Under the high complication of MLSE arithmetic, the method and device can simplify the concrete realization of MLSE checking, which is favorable for actual application.

Description

technical field [0001] The invention relates to anti-jamming detection of baseband transmission in a wireless communication system, in particular to a multi-level detection method and a device for hybrid digital filtering and MLSE detection. Background technique [0002] For actual baseband transmission systems, crosstalk is unavoidable. When the influence of crosstalk is serious, the transfer function of the whole system must be corrected or equalized to make it close to the condition of distortion-free transmission. The equalizer at the receiving end is usually placed in the intermediate frequency or baseband of the receiver, which produces characteristics opposite to the channel characteristics, and is used to offset the interference caused by the time-varying channel and multi-path propagation characteristics, especially in high-data-rate wireless transmission systems, fading will Serious intersymbol interference is caused. [0003] The current digital filter or equali...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to provide a multi-level hybrid detection method and its use device, which can reduce the complexity of MLSE detection on the basis of ensuring a certain performance gain. The method and its use device are further specifically defined to solve the problem of DFT-S- In the OFDM system, due to the related data introduced by the precoding at the transmitting end, after multipath channel and noise superimposition, the maximum likelihood sequence detection algorithm is used to detect the high complexity problem at the receiving end.

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