Title :
Analysis of QS-CDMA over Frequency Selective Time Non-Selective Nakagami-m Fading Channels
Author :
Yilmaz, Ferkan ; Kucur, Oguz
Author_Institution :
Elektron. Muhendisligi Bolumu, Gebze Yuksek Teknoloji Enstitusu, Kocaeli
Abstract :
In this work, symbol error rate (SER) performance of quasi synchronous (QS) CDMA system over frequency selective time non-selective multipath Nakagami-m fading channels is obtained for M-ary phase shift keying (MPSK) signaling, deterministic spreading sequences and different chip waveforms with a maximal ratio combiner (MRC) at the receiver. We show that the performance of QS-CDMA will be as good as or slightly better than the synchronous performance of direct sequence (DS) CDMA when the maximal allowed time offset does not need to be less than 0.2 for rectangular and 0.7 for raised-cosine chip waveform. With this flexibility of maximal allowed time offset, the complexity of synchronization task is reduced
Keywords :
Nakagami channels; code division multiple access; error statistics; multipath channels; phase shift keying; receivers; sequences; synchronisation; M-ary phase shift keying; MPSK signaling; MRC; QS-CDMA system; SER performance; chip waveform; deterministic spreading sequence; frequency selective fading channel; maximal ratio combiner; multipath Nakagami-m fading channel; quasisynchronous code division multiple access; receiver; symbol error rate; time nonselective fading channel; AWGN; Error analysis; Fading; Frequency shift keying; Frequency synchronization; Multiaccess communication; Phase shift keying; Reactive power; Tellurium; Veins;
Conference_Titel :
Signal Processing and Communications Applications, 2006 IEEE 14th
Conference_Location :
Antalya
Print_ISBN :
1-4244-0238-7
DOI :
10.1109/SIU.2006.1659680
