Method for detecting uplink signal in multi-cell MIMO system for interacting part of soft information

A technology of signal detection and soft information, which is applied in the field of mobile communication, can solve the problem of large amount of soft information, achieve the effect of reducing the amount of calculation, reducing the amount of information interaction, and reducing the complexity of communication
CN104901731AActive Publication Date: 2015-09-09ZHEJIANG SCI-TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SCI-TECH UNIV
Publication Date
2015-09-09

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Abstract

The invention discloses a method for detecting an uplink signal in a multi-cell MIMO system for interacting part of soft information. The method comprises the following steps: detecting all signals with each base station, obtaining posterior probabilities of each base station to all symbols, ranking the maximum posterior probability of all symbols from the large to small with each base station, selecting front posterior probability data, transmitting the posterior probability data of the selected constellation points to adjacent base stations who participate in a cooperative detection; calculating posterior probability data which is not selected and transmitted by other base stations after each base station receives soft information of local user symbol transmitted by other base stations; performing soft combination to the processed integrating probability data with the each base station, calculating the posterior probability of the symbol transmitted by the user in local cell, and selecting symbol whose probability is the largest as a final detecting result. The method of the invention could effectively reduce complexity of detecting an uplink baseband signal in the multi-cell MIMO system.
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Description

technical field

[0001] The invention belongs to the mobile communication technology, and in particular relates to a method for detecting uplink signals of a multi-cell MIMO system for exchanging partial soft information. Background technique

[0002] In a multi-user multi-cell MIMO system, multiple base stations cooperate to jointly detect the uplink signals of multiple users to improve the accuracy of signal detection, but this method is complex and requires a large amount of calculation. As the number increases, the amount of computation increases exponentially.

[0003] After searching the existing technology, Shaoshi Yang and TiejunLv found in "Distributed Probabilistic-Data-Association-Based SoftReception Employing BaseStation Cooperation in MIMO-AidedMultiuserMulticell Systems" IEEE Trans.Vehicular Technology.vol.60, no.7, pp.3532-3538 ,Sept.2011. (i.e. base station distributed cooperative detection based on probabilistic data association technology in multi-user mult...

Claims

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