Multi-service multiplexing dual-antenna diversity method and system

Abstract

The invention discloses a multi-service multiplexing dual-antenna diversity method and a multi-service multiplexing dual-antenna diversity system. The method comprises the following steps: regulating the transmission rate of a smaller data stream to ensure that the transmission rate of the smaller data stream is matched with that of a larger data stream; controlling the power of the larger data stream to obtain average transmission power; controlling the power of the smaller data stream to obtain the average transmission power, wherein the summation of the average transmission power of the larger data stream and the average transmission power of the smaller data stream is constant; performing time space coding on the two data streams at the same time; respectively extracting data blocks to two transmitting antennas from the two data streams after performing the time space coding; and inserting related training sequences into the data blocks to form a signal frame for transmitting. Themethod and the system realize the multiplexing of the larger data stream and the smaller data stream by utilizing the time space coding, give consideration to the advantages of a plurality of antennas at the same time of realizing the improvement on the transmission rate of a system, and obtain a certain space diversity gain so as to improve the anti-multipath fading capability of the system.

Description

technical field [0001] The present invention relates to the technical field of digital information transmission, and more specifically relates to a dual-antenna diversity method and system for multi-service multiplexing. Background technique [0002] In the wireless environment, there are many kinds of fading in the transmission channel, such as time selective fading and frequency selective fading. When the signal is transmitted in a fading channel, the SNR (Signal to Noise Ratio) of the received signal is unstable. When the signal passes through a deep fading channel, the SNR of the received signal decreases, and the probability of a judgment error increases. Diversity technology is a technology that can effectively overcome time and frequency selective fading. It transmits the same information on multiple independent channels, and then the receiving end synthesizes the received signals according to a certain algorithm, because several independent channels At the same time...

AI Technical Summary

Problems solved by technology

Although there are many ways to achieve this goal, none of them can achieve a certain space diversity gain while increasing the system transmission rate, thereby improving the system's ability to resist multipath fading

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