Patent ID: 7804885

Claim:
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 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 a single linear filter adapted to process the received data, after subtraction of an interference estimate, to generate a K-dimensional vector corresponding to an evaluation of the sent modulated data before the spreading of the step (B), the filtering by means of the single linear filter 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 K-dimensional vector 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 K-dimensional vector, wherein the interference estimate for the received data is sent recursively to the next subtraction step, wherein, on sending, the data was coded before the step (A) and, on reception, said processing to generate the interference estimate for the received data uses weighted output vectorial processing, a decoding process, and regeneration of interference, wherein the weighted output vectorial processing processes the K-dimensional vector and generates probabilistic information on modulated data bits usable by the decoding process, wherein the decoding process generates a probabilistic quantity from said probabilistic information, wherein the regeneration of interference generates the interference estimate for the received data on the basis of the probabilistic quantity, and wherein the interference estimate for the received data is sent recursively to the next subtraction step.