Patent ID: 9559809
Date: 2017-01-31
CPC Classifications: H03M,H04L

Claim:
1. A method of predicting the performance of a communication system on a Multiple Input Multiple Output (MIMO) transmission channel, wherein the system comprises: a transmitter suitable for applying bit interleaved coded modulation to information bits supplied by a source so as to generate coded symbols, these coded symbols being transmitted by the transmitter over the transmission channel, the coded modulation being based on a turbo-code comprising at least two constituent codes and adapted to encode the information bits in coded bits; and wherein the system further comprises an iterative receiver, suitable for performing an iterative interference cancellation technique in order to process the coded symbols received from the transmission channel, the iterative receiver comprising an equalizer, which estimates the coded symbols transmitted by the transmitter over the transmission channel said equalizer having an input and an output, a demodulator, which provides an estimation of the coded bits generated by the turbo-code, and a turbo-decoder which decodes the coded bits generated by the turbo-code said turbo-decoder having an input and an output wherein the equalizer, the demodulator and the turbo-decoder are activated during each iteration performed by the iterative receiver, the turbo-decoder comprising at least two decoders suitable for decoding the respective constituent codes of the turbo-code, the decoders being suitable for interchanging probabilistic quantities in an iterative manner wherein, during each iteration performed by the iterative receiver, the equalizer uses probabilistic quantities on the coded bits provided at a preceding iteration by the turbo decoder, the demodulator uses the estimation of the coded symbols provided by the equalizer and the turbo decoder uses the output of the demodulator and probabilistic quantities representative of a priori probabilities on the information bits to decode the coded bits and provides probabilistic quantities on the coded bits used at a subsequent iteration by the equalizer; the prediction method comprising, for each iteration i of the iterative receiver: a first determination process of determining a value a second determination process of determining: the second determination process being done from the value the variance