Space-time coding is a powerful way to leverage spatial diversity gain and improve reliability in multiple input multiple output (MIMO) communication systems. In this paper, we examine a semi-blind adaptive time-domain equalization (TEQ) strategy in conjunction with Alamouti space-time coding to achieve channel shortening. Channel shortening is necessary when the channel response is longer than...

Abstract In a frequency-selective fading channel, the performance of single-carrier (SC) transmission significantly degrades due to severe inter-symbol-interference (ISI). In this paper, delay transmit diversity and space-time transmit diversity (STTD) as transmit diversity are combined with minimum mean square error (MMSE) frequency-domain equalization achieving frequency diversity effect whil...

In this paper we propose a new space diversity scheme for broadband PLC systems using orthogonal space-time block coding (OSTBC) transmission combined with single-carrier frequency-domain equalization (SC-FDE). To apply this diversity technique to PLC channels, we first propose a new technique for combining SC-FDE with OSTBCs applicable to all dispersive multipath channels impaired by impulsive...

In this letter two noise-predictive equalization schemes, which are based on zero-forcing (ZF) and minimum mean square error (MMSE) criteria, are presented for unique-word (UW) based single-carrier systems. The correlation properties of the noises in the outputs of the frequency domain equalizer are exploited to predict and cancel the noise contained in the estimation of data. Theoretical analy...

Techniques for reducing interchannel interference (ICI) of orthogonal frequency division multiplexing (OFDM) systems under a fast fading channel are presented. Combined frequency domain equalization and bit-interleaved coded modulation (BICM) are investigated. Using the fact that ICI energy is concentrated in adjacent subchannels, the complexity of the frequency domain equalization can be signi...

| An improved optimization algorithm for the time domain equalizer (TEQ) is developed in case of Frequency Division Multiplexing-based Asymmetric Digital Subscriber Line (FDM-ADSL). In contrast with existing algorithms, our algorithm explicitly disregards the unused tones in the optimization function as well as in the non-triviality constraint. Some simulation results are presented for the upst...

ORTHOGONAL SPACE TIME CODING FOR IM/DD OPTICAL WIRELESS COMMUNICATION WITH SINGLE CARRIER FREQUENCY DOMAIN EQUALIZATION