Low Complexity Frequency-Domain Despreading for Cyclic- Prefix CDMA Systems
Journal
IEEE Communications Letters
Journal Volume
8
Journal Issue
6
Pages
339-341
Date Issued
2004-06
Author(s)
P. H. Lin
Abstract
In this letter, a frequency-domain despreading method for the cyclic-prefix code-division multiple-access (CP-CDMA) system is introduced. Using the orthogonality transformation property of the discrete Fourier transform (DFT), we can despread the received CP-CDMA signals in the frequency domain. Moreover, we propose an efficient architecture for the proposed frequency-domain despreader. Comparison with the conventional time-domain despreading approach shows that the proposed architecture can save a large amount of computation. The proposed scheme is therefore suitable for efficient implementation of CP-CDMA receivers that adopt frequency-domain equalization and despreading. © 2004 IEEE.
Type
journal article