Iterative receiving method for a MIMO system, and corresponding receiver and computer program

Data signal receiver comprising:

• NR receiving antennas, where NR is greater than or equal to 2, for receiving a data signal having undergone a channel encoding and a spatial multiplexing before emission and being emitted on NT emission antennas, where NT is greater than or equal to 2, each of said emission antennas emitting a part of said signal;
• a transmission channel estimator, which estimates a transmission channel between said emission antennas and said receiving antennas;
• at least two elementary modules driven successively, which are adapted to improve an estimation of the received signal depending on said received data signal and a preceding estimation of said received data signal, each of said elementary modules comprising:
• a filter, which filters said received signal and delivers a filtered signal;
• an interference estimator, which determines an interference affecting said received data signal, implementing a multiplication of said preceding estimation of said received data signal by a matrix representing interferences due to the transmission channel for the transmission of said received data signal, said interference estimator delivering an estimated interference;
• a subtractor, which subtracts said estimated interference from said filtered signal so as to obtain an improved signal;
• an equalizer, which equalizes said improved signal, delivering an equalized signal;
• and
• a data signal estimator, which estimates the data signal emitted, called an estimated signal, from said equalized signal.

Computer program product comprising instruction sequences adapted to the implementation of a reception method when said program is executed on a computer, wherein the reception method comprises:

• implementing NR receiving antennas, where NR is greater than or equal to 2, for receiving a data signal, said data signal having undergone a channel encoding and a spatial multiplexing before emission and being emitted on NT emission antennas, where NT is greater than or equal to 2, each of said antennas emitting a part of said signal;
• estimating a transmission channel between said emission antennas and said receiving antennas;
• and
• at least one iteration to improve an estimation of the received signal, depending on said received signal and a preceding estimation of said received signal, said iteration comprising the steps of:
• filtering said received signal, delivering a filtered signal;
• determining an interference affecting said received signal, implementing a multiplication of said preceding estimation of said received signal by a matrix representing interferences due to the transmission channel for the transmission of said received signal, said determining operation delivering an estimated interference;
• subtracting said estimated interference from said filtered signal so as to obtain an improved signal;
• equalizing said improved signal, delivering an equalized signal;
• and
• estimating the data signal emitted, called an estimated signal, from said equalized signal.