Spacetimefrequency coding over quasi-static frequency-selective channels with linear complexity for the ML receiver

The achievement of our previously proposed spacetime coding algorithm entitled full-ratelinear-receiver spacetime block code (frlr stbc) has motivated us to propose, in this paper, a newclass of high-rate spacetimefrequency block codes (stfbcs) over frequency-selective rayleigh fadingchannels. we have called these codes frlr stfbcs with interleaving (frlr stfbcs-i). frlr stfbcs-icould achieve a full-diversity property over quasi-static channels. simulation results also verify that theproposed schemes exhibit proper performances in comparison with the recently proposed stfbcs. themost outstanding characteristic of the newly introduced high-rate codes is the linear complexity of themaximum likelihood (ml) receiver which makes possible a fast and economical decoding process.