Performance Analysis of OFDMNMSK/NQMSK Systems Based on DCT

doi:10.13190/jbupt.201002.39.262

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (2): 39-43.doi: 10.13190/jbupt.201002.39.262

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Performance Analysis of OFDMNMSK/NQMSK Systems Based on DCT

WENG Weiwen^1, LIU Yuanan^1, HU Hefei^2, YUAN Dongming^1

(1School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)

Received:2009-06-21 Revised:2009-09-27 Online:2010-04-28 Published:2010-04-28
Contact: Yuan-An Liu

Abstract

Abstract:

One type of orthogonal frequency division multiplexing (OFDM)-N minimumshift keying (NMSK)/N quadrature MSK (NQMSK) system based on discrete cosine transform (DCT) is proposed. By combining the NMSK modulation scheme with the OFDM technology based on DCT, although the frequency efficiency is reduced to some extend, it can improve the outofband attenuation greatly and the performance deterioration caused by carrier frequency offset (CFO) will be mitigated. In the presence of CFO, analysis and simulation results show the excellent performance of the OFDMNMSK/NQMSK system based on DCT over both additive white Gaussian noise (AWGN) and Rayleigh fading channels. 

Key words: discrete cosine transform, orthogonal frequency division multiplexing, N minimum-shift keying, carrier frequency offset, inter-carrier interference

Weng Wei-Wen Yuan-An Liu . Performance Analysis of OFDMNMSK/NQMSK Systems Based on DCT[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2010, 33(2): 39-43.

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Performance Analysis of OFDMNMSK/NQMSK Systems Based on DCT

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