Abstract: An embodiment of a method for channel estimation for an Orthogonal Frequency Division Multiplexing communication system, including estimating a Time Domain Least Squares channel impulse response having a given maximum number of L taps based on a channel covariance matrix Q, and for each tap l=1, . . . , L a respective channel impulse response in the time-domain ?l, wherein the channel impulse responses in the time-domain are grouped as a channel impulse response vector in the time domain ?. Specifically, an updated channel-impulse-response vector in the time domain {tilde over (h)} is determined by computing for each tap l the solution of the following system: Q1:l, 1:l{tilde over (h)}l×1=?1:l, wherein the updated channel-impulse-response vector in the time domain {tilde over (h)} is computed recursively via a Levinson Durbin algorithm.

Abstract: An embodiment of a method for channel estimation for an Orthogonal Frequency Division Multiplexing communication system, including estimating a Time Domain Least Squares channel impulse response having a given maximum number of L taps based on a channel covariance matrix Q, and for each tap l=1, . . . , L a respective channel impulse response in the time-domain ?l, wherein the channel impulse responses in the time-domain are grouped as a channel impulse response vector in the time domain ?. Specifically, an updated channel-impulse-response vector in the time domain {tilde over (h)} is determined by computing for each tap l the solution of the following system: Q1:l, 1:l{tilde over (h)}l×1=?1:l, wherein the updated channel-impulse-response vector in the time domain {tilde over (h)} is computed recursively via a Levinson Durbin algorithm.

Abstract: A method and system for decoding signals includes a transmitter configured for transmitting signals encoded with a mapping, with different and separable configurations in a real part and an imaginary part of the signal. The signals may be encoded according to a Gray or QAM mapping, and may be transmitted on a selective MIMO channel and/or multiplexed with an OFDM technique. The corresponding receiver is configured for decoding the real part and the imaginary part of the signals separately, and may include a filter for subjecting the encoded signals to a Wiener filtering and a MMSE detector for minimizing the mean-square error between the encoded signals and the result of the Wiener filtering. The receiver may also include a soft decoder for performing a soft estimation of the signals and cancelling, using the results of the soft estimation, an interference produced on the signals.

Abstract: A system for the transmission of signals comprises a transmitter configured for transmitting signals xt, encoded with a mapping, with different and separable configurations in the real part and the imaginary part of the signal. These may be, for example, signals xt encoded according to a Gray mapping, signals xt encoded with two QAM mappings, encoded signals xt transmitted on a selective Multiple-Input/Multiple-Output (MIMO) channel and/or encoded signals xt multiplexed with an Orthogonal-Frequency-Division-Multiplexing (OFDM) technique. The corresponding receiver is configured for decoding in a distinct way the real part R(xt) and the imaginary part I(xt) of said signals, and typically comprises a filter for subjecting said encoded signals xt to a Wiener filtering {circumflex over (x)}t, and a Minimum-Mean-Square-Error (MMSE) detector configured for minimizing the mean-square error between said encoded signals xt and the result of said Wiener filtering {circumflex over (x)}t.