Quasi-Orthogonal Time Division Multiplexing and Its Performances in Rayleigh Fading Channels. (27th March 2012)

• Record Type: Journal Article
• Authors: Sun, Enchang; Yi, Kechu; Tian, Bin; Zhang, Dongying
• Other Names: Maaref A. Academic Editor.; Teh K. Academic Editor.
• Is Part Of: ISRN communications and networking. Volume 2012(2012)
• Publication Date: 2012-03-27
• Subjects: Communication -- Periodicals; Computer networks -- Periodicals; Telecommunication -- Periodicals; Communication; Computer networks; Telecommunication; Electronic journals; Electronic journals; Periodicals; 004.6
• DOI: 10.5402/2012/295424
• Languages: English
• ISSNs: 2090-4355

Abstract

Abstract : This paper proposes an efficient transmission scheme, Quasi-Orthogonal Time Division Multiplexing (QOTDM), which employs the shift orthogonal property of the pulse function with raised-cosine spectral shape, and the signal waveforms are quasi-orthogonal in time domain. Comparing to orthogonal frequency division multiplexing (OFDM), QOTDM is less sensitive to carrier frequency offset and power amplifier nonlinearities while keeping a similar spectral efficiency with OFDM due to single-carrier characteristics. QOTDM is a suitable consideration for the downlink transmission such as in satellite communications. An upper bound of sample error probability (SER) is derived to evaluate the performance of QOTDM. Comparisons of QOTDM and OFDM in Rayleigh fading channels show that the proposed QOTDM system is better than that of OFDM system in terms of bit error rate (BER) in highE b / N o regions.