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Lookup NU author(s): Professor Said Boussakta,
Dr Salama Ikki
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This paper presents a new Alamouti space-timeblock coding (STBC) orthogonal frequency division multiplexing (ST-OFDM) system. The transmitter of the proposed scheme is based on a low complexity X-transform that is developed in  as a modulation scheme instead of the inverse fast Fourier transform (IFFT). The proposed ST-X-OFDM scheme massively reduces the transmitter complexity, the effects of multipath channels, and the peak-to-average power ratio (PAPR). The complexity of the proposed scheme is evaluated and compared with the conventional ST-OFDM, showing that the proposed scheme is efficient, fast, and simple in implementation. An exact closedform bit-error rate (BER) is derived for the proposed scheme over multipath channels and different kinds of modulation formats. Computer simulations corroborated by mathematical results prove that, over frequency-selective multipath channels and different mapping schemes, the proposed approach achieves significant signal-to-noise ratio (SNR) gain in comparison to the ST-OFDMsystem. The proposed ST-X-OFDMsystem adopts only a single, low complexity transform at the transmitter without precoding and achieves significant BER improvement over the conventional ST-OFDM system.
Author(s): Leftah HA, Boussakta S, Ikki S
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 9th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP 2014)
Year of Conference: 2014
Online publication date: 16/10/2014
Acceptance date: 01/01/1900
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