Title :
Performance of asynchronous long-code multicarrier CDMA systems in the presence of correlated fading and inter-carrier interference
Author :
Chien, Feng-Tsun ; Hwang, Chien-Hwa ; Kuo, C. C Jay ; Chang, Dah-Chung
Author_Institution :
Dept. of Electr. Eng., Southern California Univ., USA
Abstract :
The effect of inter-carrier interference (ICI) and aperiodic random spreading sequences on the performance of asynchronous multicarrier code division multiple access (CDMA) systems with correlated fading is investigated in this research. Random parameters including asynchronous delays, correlated Rayleigh fading and spreading sequences are averaged to determine the unconditional covariance matrix of the interference-plus-noise vector. An analytic expression for the bit error probability is obtained based on the Gaussian approximation. Then, we extend the result by considering situations where eigenvalues are not necessarily all identical or distinct. Finally, design tradeoffs among the number of sub-carriers, fading correlations, ICI and multipath effect are presented in simulation results.
Keywords :
Gaussian channels; Rayleigh channels; code division multiple access; correlation methods; covariance matrices; eigenvalues and eigenfunctions; error statistics; interference suppression; spread spectrum communication; Gaussian approximation; aperiodic random spreading sequences; asynchronous delays; asynchronous long-code multicarrier CDMA systems; bit error probability; code division multiple access; correlated Rayleigh fading; correlated fading; covariance matrix; eigenvalues; intercarrier interference effect; interference-plus-noise vector; Covariance matrix; Delay; Eigenvalues and eigenfunctions; Error probability; Fading; Gaussian approximation; Interference; Multiaccess communication; Multicarrier code division multiple access; Rayleigh channels;
Conference_Titel :
Communications, 2003. ICC '03. IEEE International Conference on
Print_ISBN :
0-7803-7802-4
DOI :
10.1109/ICC.2003.1204035
