Delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation

Abstract

The invention discloses a delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation. The method comprises the steps that (1) a space-time code set is extracted to acquire a characteristic quantity set; (2) a parallel matrix and characteristic quantity function value vector quantities are calculated; (3) characteristic quantities are pre-estimated according to the characteristic quantity function value vector quantities to acquire a new space-time code set and a noise power estimation value; (4) the parallel matrix is whitened to acquire a solution correlation matrix; (5) the time-delay correlation norm of the solution correlation matrix is calculated; (6) a time-delay correlation matrix of code patterns in the new space-time code set is calculated; (7) time-delay relevance vector quantities are calculated according to parameters in the fifth step and the sixth step; (8) a code pattern corresponding to an element with the minimum value in the time-delay relevance vector quantities is chosen as a judgment code pattern. The delay-dependent space-time code mode blind identification method based on characteristic quantity pre-estimation overcomes the defect that the complexity of a system in the prior art is high due to the large calculation, widens the identification range of an existing space-time code blind identification method, and can be used for a space-time code pattern used at a blind identification sending end.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a space-time block code coding mode blind recognition method in the field of space-time signal detection technology, which can be used in a multiple-input multiple-output MIMO system for blind recognition of space-time block codes. Background technique [0002] MIMO system is the key technology of next-generation wireless communication, and space-time code is an important part of MIMO system. The blind recognition of space-time codes is an urgent research area in the field of communication countermeasures. It can provide the basis and technical support for MIMO system countermeasures, has important theoretical significance and military application value, and has attracted the attention of the academic community. [0003] Blind recognition of space-time codes is an emerging topic, and the existing algorithms are divided into maximum likelihood detection algorithm and t...

AI Technical Summary

Problems solved by technology

However, when this method is used for MIMO detection in engineering practice, there are shortcomings: it cannot recognize a variety of coding modes with the same packet length and the number of symbols in each packet, and cannot recognize BLAST codes when the number of receiving antennas is equal to the number of sending antennas model

However, this method still has many deficiencies in the MIMO blind recognition system: it cannot distinguish multiple patterns with the same F-norm solution, and the computational complexity increases geometrically with the sampling time length

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