Loop iteration cooperative signal processing method and device

Abstract

The invention discloses a loop iteration cooperative signal processing method and device. The method includes the following steps that: the processing link information of received signals is acquired;the posterior probability information of first information extracted by a first processing link in target iterations is calculate and is transmitted to a second processing link; the posterior probability information of second information extracted by the second processing link in the target iterations is calculated and is transmitted to the first processing link, and therefore, loop iteration canbe realized; whether the posterior probability information of the first information and the posterior probability information of the second information satisfy a convergence condition is judged, andif the posterior probability information of the first information and the posterior probability information of the second information satisfy the convergence condition, the loop iteration is terminated, the estimation result of the first information is calculated according to the posterior probability information of the first information, or the estimation result of the second information is calculated according to the posterior probability information of the second information. Thus, information is fully transmitted and utilized in an iteration process, and the receiving performance of communication signals is improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for loop iterative cooperative signal processing. Background technique [0002] The communication receiving system includes multiple processing links such as synchronization, equalization, coordination, and decoding. To obtain the required bit information recovery performance, there are corresponding processing thresholds for the given processing methods of each processing link. When the quality of the input signal or information is lower than the corresponding processing threshold, the bit information cannot be effectively recovered eventually. Compared with the traditional communication receiving system that adopts data stream-by-data stream and link-by-link processing, the multi-data stream and multi-link joint processing method can equivalently reduce the processing threshold of each processing link. [0003] Among them, an existing joint p...

AI Technical Summary

Problems solved by technology

However, all or part of the iterative process of the EM algorithm is the bit information or the specific value of the intermediate variable, which will cause the loss of information; and in the existing EM algorithm, only by obtaining the posterior expectation of the hidden variable The use of hidden variable information does not make full use of information from other related links

To sum up, the existing joint processing method will lead to the loss of information, cannot make full use of information, and reduces the receiving ability of the communication receiving system

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