Title :
BER performance of multicarrier spread spectrum chip-level differential detection in multipath fading channels
Author :
Lijun, Song ; Youxi, Tang ; Shaoqian, Li
Author_Institution :
Nat. Key Lab of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
A novel differential detection method in frequency domain spread spectrum systems, called multicarrier spread spectrum chip-level differential detection (MC-SS-CLDD), is proposed. The moment generating function (MGF) of the decision variable and a saddlepoint approximation method are exploited to analyze the BER performance of MC-SS-CLDD. The results of analysis and simulation indicate that, if the coherent bandwidth of the channel does not exceed the occupied bandwidth of two subcarriers, MC-SS-CLDD exhibits a better performance in making the system resistant to frequency-selective fading in the case of narrower channel coherent bandwidth.
Keywords :
OFDM modulation; code division multiplexing; differential detection; error statistics; fading channels; multipath channels; spread spectrum communication; BER performance; MC-SS-CLDD; channel coherent bandwidth; code division multiplexing; decision variable moment generating function; frequency domain spread spectrum systems; frequency-selective fading; multicarrier spread spectrum chip-level differential detection; multipath fading channels; orthogonal frequency division multiplexing; saddlepoint approximation method; Bandwidth; Bit error rate; Fading; Fluctuations; Frequency domain analysis; Intersymbol interference; Performance analysis; Phase detection; Spread spectrum communication; Transceivers;
Conference_Titel :
Wireless Communications and Networking Conference, 2005 IEEE
Print_ISBN :
0-7803-8966-2
DOI :
10.1109/WCNC.2005.1424503
