A MLSE simplification detection method and its device based on MMSE

A detection method and detection device technology are applied in baseband system components, shaping networks in transmitters/receivers, equalizers, etc., which can solve problems such as high complexity and reduce complexity, and achieve reduced complexity and requirements Average, average processing power

Inactive Publication Date: 2008-04-30
ZTE CORP
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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

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  • A MLSE simplification detection method and its device based on MMSE
  • A MLSE simplification detection method and its device based on MMSE
  • A MLSE simplification detection method and its device based on MMSE

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Embodiment Construction

[0031] At first, illustrate the inventive thought:

[0032] (1) the present invention provides a kind of simplified MLSE detection algorithm, comprises the following steps:

[0033] The sequence to be inspected is firstly tested by MMSE to obtain the initial judgment sequence;

[0034] The extension rule based on the distance is used to expand the initial judgment sequence, and derive multiple MLSE pending judgment sequences centered on the initial judgment sequence;

[0035] All sequences to be decided are traversed as determined candidate input sequences, and the sequence with the maximum likelihood to the received sequence is selected as the decision result.

[0036] (2) Certain expansion rules in the above steps can be: bit expansion rules, i.e. Hamming distance expansion rules, expansion parameters P = Ham min g _ dis tan ce ( S , ...

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Abstract

The present invention relates to a MMSE-based MLSE simplified detection method and its device, which are applied in a single-carrier system, wherein the method includes: generating a preliminary judgment sequence from a user signal according to a channel estimation value and the minimum mean square error MMSE criterion; The initial judgment sequence is expanded around to form a set of sequences to be judged; the set is traversed, and the sequence with the maximum likelihood of the user signal is selected as the detection result according to the maximum likelihood criterion; wherein, the device detects in the block ML Before the detector (32), an MMSE detector (31) is also provided for preprocessing. This method and its device greatly reduce the complexity of the MLSE algorithm, while the performance is superior to the MMSE algorithm. On the basis of ensuring a certain performance gain, the complexity is greatly reduced at the cost of a small amount of performance, making the simplified detection method And devices have the same requirements on hardware and processing capabilities, so it is convenient for 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...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L25/03H04L27/01H04L27/26
Inventor 张峻峰
Owner ZTE CORP
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