抄録
The bit error rate (BER) performance of DS-CDMA in a frequency-selective fading channel can be significantly improved by the use of frequency-domain equalization (FDE). Accurate estimation of the channel transfer function is necessary for FDE. Direct application of pilot-assisted channel estimation (CE) degrades the BER performance, since the frequency spectrum of the pilot chip sequence is not constant over the spreading bandwidth. In this paper, we propose a pilot-assisted frequency-domain CE based on minimum mean square error (MMSE) criterion. The BER performance with MMSE-CE in a frequency-selective Rayleigh fading channel is evaluated by computer simulation. It is found that MMSE-CE always provides a good BER performance irrespective of the choice of pilot chip sequence. For a spreading factor SF of 16, the E b /N 0 degradation with MMSE-CE from the ideal CE case is as small as 0.4 dB at BER=10 -4 (a 0.28 dB loss due to the pilot insertion is included).
| 本文言語 | English |
|---|---|
| ページ（範囲） | 447-451 |
| ページ数 | 5 |
| ジャーナル | IEEE Vehicular Technology Conference |
| 巻 | 61 |
| 号 | 1 |
| 出版ステータス | Published - 2005 10月 18 |
| イベント | 2005 IEEE 61st Vehicular Technology Conference -VTC 2005 - Spring Stockholm: Paving the Path for a Wireless Future - Stockholm, Sweden 継続期間: 2005 5月 30 → 2005 6月 1 |
ASJC Scopus subject areas
- コンピュータ サイエンスの応用
- 電子工学および電気工学
- 応用数学