Patent ID: 7787521
Filing Date: 2010-08-31
Classification: H04B

Abstract:
1. A reception method for communication over frequency-selective channels with a plurality of send antennas and a plurality of receive antennas, wherein said reception method is adapted to process data received by the receive antennas that, on sending, was successively: (A) modulated onto K channels, the number K being strictly greater than a number T of the plurality of send antennas; (B) spread in the frequency or time domain, with an N×K periodic spreading matrix or an N×K aperiodic spreading matrix where N is strictly greater than T, over K-dimensional vectors of the modulated data; wherein the reception method uses iteratively for processing the received data: filtering by means of K linear filters adapted to process the received data, after subtraction of an interference estimate, to generate an evaluation of the sent modulated data before the spreading of the step (B), the filtering by means of the K linear filters taking account of the spatial diversity of the plurality of receive antennas; before said filtering, subtracting interference using an estimate of multi-antenna interference (MAI), intersymbol interference (ISI), and multi-user interference (MUI) previously regenerated from information computed on the basis of the evaluation of the sent modulated data generated by a previous filtering operation; and processing to generate an interference estimate for the received data from information computed on the basis of the evaluation of the sent modulated data, wherein the interference estimate for the received data is sent recursively to the next subtraction step.