Improved BER performance for MIMO-OFDM systems with interference using joint parameter estimation spatial filtering aided MAP detection

Authors:
Lisheng Fan;Yangyang Zhang;Yongquan Jiang;Kai-Kit Wong
Affiliations:
Department of Electronic Engineering, Shantou University, Guangdong, China;Department of Electrical and Electronic Engineering, University College London, London, United Kingdom;Department of Electronic Engineering, Shantou University, Guangdong, China;Department of Electrical and Electronic Engineering, University College London, London, United Kingdom
Venue:
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Year:
2009

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Abstract

This paper develops a joint maximum a posteriori (MAP) spatial filtering receiver by employing a joint parameter estimation approach for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) modulation systems, which can achieve promising bit-error-rate (BER) performance in the presence of co-channel interference (CCI). For a MAP receiver to suppress the CCI, conventionally, this can be done in two ways: 1) spatio-temporal filtering (STF) the received signals prior to the fast Fourier transform (FFT), which we refer to it as preFFT-STF; 2) spatial filtering (SF) the received signals posterior to FFT, which is referred to as postFFT-SF. Simulation results show that the proposed scheme outperforms significantly both the preFFT-STF and postFFT-SF systems.