Abstract: A method of coordinating a transmitter with K?1 transmitters of a group of K transmitters. The K transmitters are in communication respectively with K receivers via channels that are described, for a frequency band m by direct transmission channel gains (gji,m) when j=i and by interfering transmission channel gains (gji,m) when j?i between the transmitter j and the receiver i, i?{1, . . . , K}, j?{1, . . . , K}, K>1. Each transmitter has available an estimate of the direct channel gain and estimates of the gains of channels interfering with its receiver. The method includes an “exchange” stage during which the K transmitters transmit simultaneously K respective sequences of subframes of respective power levels per band m coding the estimated channel gains (?ji,m) and during which the K transmitters receive, after each subframe, signal to interference plus noise ratios as returned by the K receivers to their respective transmitters.

Abstract: A method of coordinating a transmitter with K?1 transmitters of a group of K transmitters. The K transmitters are in communication respectively with K receivers via channels that are described, for a frequency band m by direct transmission channel gains (gji,m) when j=i and by interfering transmission channel gains (gji,m) when j?i between the transmitter j and the receiver i, i?{1, . . . , K}, j?{1, . . . , K}, K>1. Each transmitter has available an estimate of the direct channel gain and estimates of the gains of channels interfering with its receiver. The method includes an “exchange” stage during which the K transmitters transmit simultaneously K respective sequences of subframes of respective power levels per band m coding the estimated channel gains (?ji,m) and during which the K transmitters receive, after each subframe, signal to interference plus noise ratios as returned by the K receivers to their respective transmitters.

Abstract: A receiver with turbo-estimation of the data transmission channel, the receiver comprising at least a channel estimator (10) and a symbol detector (20) together with a feedback loop (50) to the channel estimator (10) for returning the transmission data as estimated by the symbol detector (20) at a preceding iteration, the receiver being characterized in that the channel estimator (10) and the symbol detector (20) are designed to implement a series of operations, each resulting in an estimate being provided of at least one distinct transmitted data item, the channel estimator (10) being designed to eliminate from a group of received data items a fraction thereof which is dependent on the transmitted data item to be estimated, and on the basis of said received data from which dependency has been eliminated, to provide a determination of the propagation channel from which dependency has also been eliminated, the symbol detector (20) continuing the operation by estimating the transmitted data on the basis of said