| CDMA系统中载频频偏估计的新方法 |
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| 引用本文： | 马章勇,赵春明,尤肖虎.CDMA系统中载频频偏估计的新方法[J].电路与系统学报,2002,7(4):49-52. |
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| 作者姓名： | 马章勇 赵春明 尤肖虎 |
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| 作者单位： | 东南大学,移动通信国家重点实验室,江苏,南京,210096 |
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| 基金项目： | 863-317-03-01-02-04-20/MII-C3G-02-04-0022项目，东大通信技术公司资助 |
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| 摘 要： | 本文针对存在载频频偏的CDMA系统，提出了一种新的估计该固有频偏的方法，先从理论上分析了CDMA信号经过广义平稳非相干散射信道（WSSUS）时载频频偏估计的最大似算法；根据CDMA系统设有连续导频的特点，对该算法进行改进，大大降低了计算的复杂度，并易于工程实现。仿真结果表明，该算法能够精确地载频频偏。
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| 关 键 词： | CDMA 载频频偏 最大似然 Rake接收机 |
| 文章编号： | 1007-0249(2002)04-0049-04 |
| 修稿时间： | 2001年8月6日 |
A Novel Scheme of Estimating Carrier Frequency Offset in CDMA |
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| MA Zhang-yong,ZHAO Chun-ming,YOU Xiao-hu.A Novel Scheme of Estimating Carrier Frequency Offset in CDMA[J].Journal of Circuits and Systems,2002,7(4):49-52. |
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| Authors: | MA Zhang-yong ZHAO Chun-ming YOU Xiao-hu |
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| Abstract: | A novel scheme of estimating the carrier frequency offset in CDMA system with the continuous pilot channel is proposed. The algorithm is derived from the maximum-likelihood(ML) rule in the wide-sense stationary un-correlative scattering channel(WSSUS). Considering the characteristic of CDMA with continuous pilot channel, a useful scheme is obtained by simplifying the algorithm .The simulation results show that the scheme can estimate the carrier frequency offset accurately and is very simple to apply in practice. |
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| Keywords: | CDMA carrier frequency offset maximum-likelihood(ML) Rake receiver |
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