Title :
Performance Comparison of CP-CDMA, CP-CS-CDMA and OFDM with Frequency Offset
Author :
Zhao, Tingting ; Zhao, Yuping
Author_Institution :
State Key Lab. of Adv. Opt. Commun. Syst. & Networks, Peking Univ., Beijing, China
Abstract :
Frequency offset can deteriorate the performance of wireless communication systems seriously. In this paper, the effect of frequency offset caused by the error of local oscillator or the time variation of the channel is studied for cyclic prefix-code division multiple access (CP-CDMA), cyclic prefix-comb spectrum-CDMA (CP-CS-CDMA) and orthogonal frequency division multiplexing (OFDM) systems. Close-form expressions of carrier-to-interference ratio (CIR) are given for fixed frequency offset and verified by simulation. The performance is also compared in the scenario with Doppler frequency offset in time-varying multi-path channels and with difference equalization schemes.
Keywords :
OFDM modulation; code division multiple access; equalisers; multipath channels; time-varying channels; CIR; CP-CS-CDMA systems; Doppler frequency offset; OFDM systems; carrier-to-interference ratio; channel time variation; code division multiple access; cyclic prefix-comb spectrum-CDMA systems; difference equalization schemes; fixed frequency offset; orthogonal frequency division multiplexing systems; time-varying multipath channels; wireless communication systems; Bit error rate; Doppler effect; Fading; Multiaccess communication; OFDM; Time frequency analysis;
Conference_Titel :
Communications Workshops (ICC), 2011 IEEE International Conference on
Conference_Location :
Kyoto
Print_ISBN :
978-1-61284-954-6
Electronic_ISBN :
978-1-61284-953-9
DOI :
10.1109/iccw.2011.5963598
