Pilot-aided chip-interleaved DS-CDMA transmission over time-varying channels

被引：13
|
作者：
Na, YX [1 ]
Saquib, M
Win, MZ
机构：
[1] Univ Texas, Wireless Commun Res Lab, Richardson, TX 75083 USA
[2] MIT, Informat & Decis Syst Lab, Cambridge, MA 02139 USA
来源：
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS | 2006年 / 24卷 / 01期
基金：
美国国家科学基金会;
关键词：
channel estimation; chip-interleaving; code-division multiple-access (CDMA); multipath channel; Rake receiver; time-varying;
D O I：
10.1109/JSAC.2005.858873
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Time-varying multipath fading associated with the wireless link limits the capacity of a wireless system. In order to adapt to this adverse radio environment efficiently, we investigate the use of a pilot-aided fade-resistant transmission scheme for the uplink of a chip-interleaved code-division multiple-access (CDMA) system. We analyze the tradeoff between the number of diversity branches and the channel estimation error. We derive the optimum ratio of pilot signal energy to information signal energy. Our numerical study indicates that the proposed system is capable of outperforming the conventional CDMA system depending on the transmitter energy and channel condition.
引用
收藏
页码：151 / 160
页数：10
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