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For multiple-input multiple-output (MIMO) spatial multiplexing systems, it is known that the maximum likelihood (ML) detector can achieve the optimal error-rate performance at the cost of high computational complexity, while the zero-forcing (ZF) detector and its variation with successive interference cancelation (SIC) attain low complexity with degraded(More)
—In wireless communications, cochannel interference (CCI) and intersymbol interference (ISI) are two main factors that limit system performance. Conventionally, a beamformer is used to reduce CCI, whereas an equalizer is used to compensate for ISI. These two devices can be combined into one as space–time equalizer (STE). A training sequence is usually(More)
Recently, pre-fast Fourier transform (pre-FFT) combining has been introduced for space-time block-coded (STBC) orthogonal frequency division multiplexing (OFDM) systems. Despite the complexity reduction, the resultant signal-to-noise ratio (SNR) values of different subcarriers are often not balanced, and it limits the system performance. In this paper, we(More)