Abstract
Recently, the decision feedback channel estimation based on the minimum mean square error criterion (DF-MMSE-CE) using a fixed DF filter coefficient has been proposed to improve the channel estimation accuracy for DS-CDMA with frequency-domain equalization (FDE). In this paper, we propose adaptive DF (ADF)-MMSE-CE, in which the DF filter coefficient is adapted to changing channel conditions based on a recursive least square (RLS) algorithm. Furthermore, the channel estimate is phase corrected upon the reception of the periodically inserted pilot chip blocks. The average BER performance of DS-CDMA with MMSE-FDE using ADF-MMSE-CE is evaluated by computer simulation in a frequencyselective Rayleigh fading channel and the simulation results show that our proposed scheme is very robust against fast fading.
Original language | English |
---|---|
Pages (from-to) | 1997-2005 |
Number of pages | 9 |
Journal | IEICE Transactions on Communications |
Volume | E90-B |
Issue number | 8 |
DOIs | |
Publication status | Published - 2007 Aug |
Keywords
- Adaptive decision feedback
- Channel estimation
- DS-CDMA
- Frequency-domain equalization
ASJC Scopus subject areas
- Software
- Computer Networks and Communications
- Electrical and Electronic Engineering