A space-time trellis code (STTC) construction method

Abstract

This invention provides a structured method of space time grid code. Through structuring the special code letter, it makes the error matrix which is formed by the output minus of different course in same condition to be upper triangular matrix, and the diagonal elements are all not zero; so the error matrix is full rank, that is, getting the full gain; then selecting the optimal code with maximum code gain in the full gain group. The method is fit for structuring space time grid code with any aerial number at will; besides, the selected grid code according to said method has larger coding gain.

Description

technical field [0001] The invention belongs to the wireless communication technology, and in particular relates to the space-time coding technology in the wireless communication system. Background technique: [0002] In wireless communication, due to the multipath effect, the signal will fade when passing through the wireless channel. As an effective anti-fading technology, multi-antenna diversity technology has attracted more and more attention. However, the multi-antenna receive diversity technology is only suitable for the base station, and it is almost impossible to use the receive diversity technology on the downlink channel due to the limitations of the size, price and battery capacity of the mobile terminal. Alamouti proposed a simple transmit diversity technique in [1.Siavash M.Alamouti, "A Simple Transmit Diversity Technique for Wireless Communications", IEEE Journal on Select Areas in Communications, VOL.16, NO.8, OCTOBER1998.], making Transmit diversity technol...

AI Technical Summary

Problems solved by technology

However, the multi-antenna receive diversity technology is only suitable for base stations. For mobile terminals, due to the limitations of size, price and battery capacity, it is almost impossible to use receive diversity technology on the downlink channel.

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