Method for forming generalized diversity code and transmission device for multi-antenna non-correlation channel

Abstract

Disclosed is a broad sense diversity code shaping method suitable in the multi-antenna noncorrelation channel and a transmitting device, wherein the coding matrix with the corresponding range is searched according to the length of the transmitting symbol sequence to be coded, the number of the transmitting antenna and the time space / time frequency symbol speed required by the communication system. The coding matrix is composed of 0 and 1, then the optimum coding matrix which meets with the constraint condition is searched according to a plurality of coding matrixes searched, finally the transmitting symbol to be coded is converted into the broad sense diversity code in the noncorrelation channel according to the optimum coding matrix. Therefore, the broad sense diversity code in the noncorrelation channel effectively improves the performance of the communication system, and has wider application range, e.g. applied in the variable sequence length and the multi-antenna communication system of the variable diversity speed.

Description

technical field [0001] The invention relates to a generalized diversity code forming method and a transmitting device suitable for multi-antenna non-correlated channels. Background technique [0002] At present, in a wireless communication system, the communication quality of a wireless user can be effectively improved by utilizing the antenna diversity gain provided by multiple antennas of a transmitter / receiver. [0003] There are many space-time technologies for obtaining antenna diversity gain, such as: space time block code (space time block code, STBC), linear dispersion code (linear dispersion code, LDC), delay diversity code, etc., among them, STBC includes orthogonal space-time Code (orthogonal space time code, OSTBC) and quasi-orthogonal space time code (quasi-orthogonal space time blockcode, QOSTBC), this type of code has better transmission performance, but the coding rate is limited, LDC code, the transmission rate is variable , can achieve near-optimal system ...

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Problems solved by technology

[0003] There are many space-time technologies for obtaining antenna diversity gain, such as: space time block code (space time block code, STBC), linear dispersion code (linear dispersion code, LDC), delay diversity code, etc., among them, STBC includes orthogonal space-time Code (orthogonal space time code, OSTBC) and quasi-orthogonal space time code (quasi-orthogonal space time blockcode, QOSTBC), this type of code has better transmission performance, but the coding rate is limited, LDC code, the transmission rate is variable , can achieve near-optimal system throughput, but the design is complex and the processing at the transmitting end is complicated. For delay diversity codes, the transmission rate is variable, and the bit error performance (BER: bit error rate) performance is slightly lower than that of LDC, but the transmitting end The processing is simple, and all space diversity gains can be obtained theoretically

Delay diversity is a method to obtain diversity gain. When the wireless channel experienced by the user is uncorrelated, the optimal codeword design criterion based on the minimum pairwise error probability (PEP) can be derived theoretically. However, according to the It is difficult to find the optimal codeword according to the criterion, so there is an urgent need for a method that can search out the codeword with practical application value to improve the communication quality of wireless users.

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