Precoded DOSTBC over Rayleigh channels
Research Letters in Communications - Regular issue
Effects of non-identical rayleigh fading on differential unitary space-time modulation
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
On noncoherent receivers for DSTM in spatially correlated fading
IEEE Transactions on Communications
Receive antenna selection for unitary space-time modulation over semi-correlated Ricean channels
IEEE Transactions on Communications
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In this paper, joint differential space-time modulation (DSTM) and eigen-beamforming for correlated multiple-input multiple-output (MIMO) fading channels. While DSTM does not require knowledge of each channel realization, the channel's spatial correlation can be easily estimated without training at the receiver and exploited by the transmitter to enhance the error probability performance. A transmission scheme is developed here that combines beamforming with differential multiantenna modulation based on orthogonal space-time block coding. Error probability is analyzed for both spatially correlated and independent Rayleigh fading channels. Based on the error probability analysis, power loading coefficients are derived to improve performance. The analytical and simulation results presented here corroborate that the proposed scheme can achieve considerable performance gain in correlated channels relative to DSTM without beamforming.