SER Performance of Enhanced Spatial Multiplexing Codes with ZFMRC Receiver in Time-Varying Rayleigh Fading Channels

Abstract EN

We propose enhanced spatial multiplexing codes (E-SMCs) to enable various encoding rates.

The symbol error rate (SER) performance of the E-SMC is investigated when zero-forcing (ZF) and maximal-ratio combining (MRC) techniques are used at a receiver.

The proposed E-SMC allows a transmitted symbol to be repeated over time to achieve further diversity gain at the cost of the encoding rate.

With the spatial correlation between transmit antennas, SER equations for M -ary QAM and PSK constellations are derived by using a moment generating function (MGF) approximation of a signal-to-noise ratio (SNR), based on the assumption of independent zero-forced SNRs.

Analytic and simulated results are compared for time-varying and spatially correlated Rayleigh fading channels that are modelled as first-order Markovian channels.

Furthermore, we can find an optimal block length for the E-SMC that meets a required SER.