A multi-level mixing detection method and its device

A detection method and detection device technology are applied in multi-frequency code systems, communication between multiple stations, electrical components, etc., which can solve the problems of reducing the complexity and high complexity of MLSE detection, and achieve easy implementation and performance gains. The effect of reducing, reducing complexity

CN101170317AInactive Publication Date: 2008-04-30ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2008-04-30
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0033] In the following, the present invention will be described in detail by taking the MMSE criterion as an example. Similar to the present invention, the zero-forcing criterion or the adaptive filtering RLS criterion can also be used to simplify MLSE detection.

[0034] At first, illustrate the inventive thought:

[0035] (1) the present invention provides a kind of simplified MLSE detection algorithm, comprises the following steps:

[0036] The sequence to be inspected is firstly tested by MMSE to obtain the initial judgment sequence;

[0037] 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;

[0038] The sequence to be decided is traversed as the determined candidate input sequence, and the sequence with the maximum likelihood to the received sequence is selected as the decision result.

[0039] (2) Certain expansion rules in the above s...