MLSE simplification detection method and its device based on blocked QR decomposition

Abstract

The invention relates to a MLSE simplification detection method based on the blocking OR decomposition and a device thereof; wherein the method comprises the following steps: the blocking OR decomposition based on the channel matrix H segments the user signal vector Y which is detected and the transmitting symbol series vector used for detection; maximum likelihood iterative detection is implemented in each section of vector from Z to A; the judgement result is combined and output. The device comprises a channel estimator(32), a channel matrix decomposition module(35), a block ML detector(31)and a segmenting length selection module(36) which is connected with or internally installed in the ML detector; wherein the channel estimator(32), the channel matrix decomposition module(35) and theblock ML detector(31) are connected with each other in turn. The device and the method iterate and process the user signals in segmentation, which greatly reduces the complication of the MLSE algorithm. Based on the certain performance gain, the complication of detection is greatly reduced at the cost of small quantity of detection performance; therefore, the detection method and the device whichare simplified need the general requirement for the hardware and the processing ability of the hardware and offer convenience for the practical application.

Description

technical field [0001] The present invention relates to anti-interference detection of baseband transmission in a wireless communication system, in particular to a single-carrier system, especially in a DFT-S-OFDM system where a large amount of detected data is correlated, using maximum-likelihood sequence estimation maximum likelihood sequence detection, MLSE is referred to as the detection method and its device as the main means of the receiving end. 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...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a MLSE simplified detection method and its use device, which can reduce the complexity on the basis of ensuring a certain performance gain, and can solve the related data introduced by the precoding at the sending end in the DFT-S-OFDM system , after the superposition of multipath channel and noise, the high complexity problem caused by applying the maximum likelihood sequence detection algorithm at the receiving end

Images