Multivariate modulation and coding for wireless communication

This paper explores the improvement in information capacity and data rate for practical systems that is possible with adaptive antenna technology applied to wireless multipath communication channels. Whereas the conventional view is that multipath signal propagation is an impediment to reliable communication, this paper shows that multipath can actually multiply the achievable data rate for wireless channels provided that the appropriate communication structure is employed. Multivariate discrete multitone (MDMT) combined with multivariate trellis coded modulation (MTCM) is proposed and analyzed as a practical means of realizing a multiplicative rate advantage when channel state information is not available at the transmitter.