Patent ID: 7436895
Filing Date: 2008-10-14
Classification: H04L

Abstract:
1. A method for performing a space-time decoding of at least two first space-time coded signals and at least two second space-time coded signals alternately transmitted via respective signals of a multi-channel communication system, comprising: demultiplexing received signals into the at least two first space-time coded signals and the at least two second space-time coded signals; obtaining a first decoding output signal by using a first decoder performing a first space-time decoding based on the at least two first space-time coded signals and a first a-priori probability signal; applying an output of one of the first decoder, or a first conversion unit that converts the output of the first decoder, to a first subtracting unit where an a-priori information signal is subtracted; scrambling an output of the first subtracting unit so as to generate a scrambled extrinsic information; applying one of the scrambled extrinsic information, or an output of a second conversion unit converting the scrambled extrinsic information, as a second a-priori probability to a second decoder receiving the at least two second space-time encoded signals; applying an output of one of the second decoder, or a third conversion unit converting the output of the second decoder, to a second subtracting unit which has another input receiving the scrambled extrinsic information; generating a descrambled signal based on an output of the second subtracting unit; and applying the descrambled signal, or an output of a fourth conversion unit converting the descrambled signal, as the first a-priori probability signal to the first decoder.