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2010

Improved linear soft-input soft-output detection via soft feedback successive interference cancellation

9 years 8 months ago
Improved linear soft-input soft-output detection via soft feedback successive interference cancellation
—We propose an improved minimum mean square error (MMSE) vertical Bell Labs layered space-time (V-BLAST) detection technique, called a soft input, soft output, and soft feedback (SIOF) V-BLAST detector, for turbo multi-input multioutput (Turbo-MIMO) systems. We derive a symbol estimator by minimizing the power of the interference plus noise, given a priori probabilities of undetected layer symbols and a posteriori probabilities for past detected layer symbols. For a low-complexity implementation, an approximate SIOF algorithm is presented, which allows for a time-invariant realization of the symbol ordering and an MMSE filtering process. Another implementation, referred to as the iterative SIOF algorithm is introduced, which decides on symbol detection order based on a posteriori symbol probabilities to improve the detection performance. Simulations performed on a space-time bit-interleaved coded modulation (STBICM) architecture over quasi-static MIMO fading channels demonstrate tha...
Jun Won Choi, Andrew C. Singer, Jung Woo Lee, Nam
Added 30 Jan 2011
Updated 30 Jan 2011
Type Journal
Year 2010
Where TCOM
Authors Jun Won Choi, Andrew C. Singer, Jung Woo Lee, Nam Ik Cho
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