This letter presents an analysis of asynchronous multicarrier code-division multiple-access (MC-CDMA) systems with a guard period (GP) in the form of a cyclic prefix over frequency-selective multipath fading channels, which results in closed-form bit-error rate performance. Furthermore, it confirms that the frequency diversity of MC-CDMA systems is identical to the path diversity. The analytical approach proposed here is extended to the case without a GP. The derived analytical results show that a GP is required for MC-CDMA systems in order to mitigate not only the effect of intersymbol interference and intercarrier interference, but also the desired signal power degradation.
Bibliographical noteFunding Information:
Paper approved by J. Wang, the Editor for Modulation, Detection, and Equalization of the IEEE Communications Society. Manuscript received April 14, 2003; revised January 11, 2004. This work was supported by the Basic Research Program of the Korea Science and Engineering Foundation under Grant R01-2002-000-00153-0(2002).
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering