Performance of Asynchronous Long-Code Multicarrier CDMA Systems in the Presence of Frequency Offsets and Correlated Fading

Feng-Tsun Chien, Chien H. Hwang, C. C. Jay Kuo

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations

Abstract

The effects of frequency offsets and aperiodic random spreading sequences on the performance of asynchronous multicarrier code division multiple access (CDMA) systems with correlated fading are investigated in this research. Random parameters including asynchronous delays, correlated Rayleigh fading and spreading sequences are averaged to determine the covariance matrix of the interferenceplus-noise vector. An analytic expression for the average signal-to-interference-plus-noise ratio (SINR) is obtained. Furthermore, average bit error probability (BEP) based on the Gaussian approximation is also derived. We show that the system degrades significantly if the frequency offset of the desired user is present, while the system is insensitive to interferers' frequency offsets. In consequence, it is crucial to estimate and compensate the desired user's synchronization imperfection. Finally, design tradeoff among the number of sub-carriers, fading correlations, and inter-carrier interference (ICI) are presented in simulation results.

Original languageEnglish
Pages1079-1083
Number of pages5
StatePublished - 1 Dec 2003
EventIEEE Global Telecommunications Conference GLOBECOM'03 - San Francisco, CA, United States
Duration: 1 Dec 20035 Dec 2003

Conference

ConferenceIEEE Global Telecommunications Conference GLOBECOM'03
CountryUnited States
CitySan Francisco, CA
Period1/12/035/12/03

Fingerprint Dive into the research topics of 'Performance of Asynchronous Long-Code Multicarrier CDMA Systems in the Presence of Frequency Offsets and Correlated Fading'. Together they form a unique fingerprint.

Cite this