Method for building synchronization sequence of MIMO non-real time platform

Abstract

The invention discloses a method used for establishing synchronous sequence for a MIMO non-real-time platform; the establishment method divides the Gold sequence into a frequency domain establishment stage and a time domain establishment stage and comprises the detailed steps as follows: (1) FFT transformation is carried out on an m-bit Gold sequence, thus gaining the frequency domain sequence; (2) 0 with the length of M is inserted into the high frequency part of the sequence digit frequency domain (M is an even number), thus ensuring the high frequency part to contain no effective information; (3) the IFFT transformation is carried out on the frequency domain sequence with the 0 inserted, the frequency domain sequence is returned to time domain so as to gain the required time domain sequence. The method improves the design of Gold sequence, is little affected by the passband non-ideal characteristic of a raised cosine roll-off filter, ensures the excellent cross correlation characteristic between the received preamble sequences; the preamble sequences of different lengths can be obtained by adjusting the number of inserted zero points, thus adapting to different system requirements, reducing the possibility of synchronous positioning error and improving the performance of the communication system.

Description

technical field [0001] The invention relates to a synchronization algorithm based on a preamble sequence in a MIMO (multiple-input multiple-output) non-real-time platform, and belongs to the technical field of realization of a multiple-input multiple-output system platform. Background technique [0002] Synchronization technology is a practical problem that any communication system needs to solve, and it is directly related to the overall performance of the communication system. Without an accurate synchronization algorithm, reliable data transmission is impossible, and synchronization technology is a prerequisite for reliable information transmission. [0003] MIMO non-real-time platform In order to study the realization of MIMO communication system in the real wireless channel environment, a set of open, phased and system-level test platform is built. CN101170333 discloses a "distributed multi-input multi-output wireless communication system real environment test platform...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the synchronous acquisition error increases due to the influence of the passband characteristic of the raised cosine roll-off filter on the orthogonality of the leading sequence in the MIMO non-real-time platform, and provides a correlation deterioration degree that is less than that of the original Gold sequence A method for constructing synchronization sequences for MIMO non-real-time platforms that can improve system performance

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