A pseudo random postfix OFDM based modulator for multiple antennae systems

This contribution extends the recently proposed pseudo-random-postfix OFDM (PRP-OFDM) transceiver to the multiple transmit multiple receive (MTMR) antennae context. In this paper a new generic MTMR modulator is proposed that grants a low complexity semi-blind identification of all channels between any transmit and receive antenna based on order-one statistics. A new channel tracking strategy is detailed based on a moving average (MA) Doppler modeling that preserves the Jakes channel coefficients correlation properties. Moreover two transceiver architectures are presented with an Alamouti based apace-time (ST) block code: equalization schemes with or without postfix interference cancellation and related modulators. Performance is illustrated by simulations in the context of the 5.2 GHz OFDM WLAN IEEE 802.11a standard.