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摘要:
Coherent detection in OFDM systems requires accurate channel state information (CSI) at the receiver. Channel estimation based on pilot-symbol-assisted transmissions provides a reliable way to obtain CSI. Use of pilot symbols for channel estimation, introduces overhead and it is desirable to keep the number of pilot symbols as minimum as possible. This paper introduces a new tight bound for the number of pilots in channel estimation using adaptive scheme in OFDM systems. We calculate the minimum number of necessary pilots using two approaches. The first approach for the number of pilots is obtained based on Doppler frequency shift estimation and the second approach is acquired based on channel length estimation using second order statistics of received signal. Finally we obtain the tight bound for the number of pilots using attained values.
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篇名 The Tight Bound for the Number of Pilots in Channel Estimation for OFDM Systems
来源期刊 通讯与网络(英文) 学科 工学
关键词 DOPPLER Frequency Shift Second Order Statistics Channel Estimation PILOT OFDM
年,卷(期) 2012,(2) 所属期刊栏目
研究方向 页码范围 146-150
页数 5页 分类号 TN91
字数 语种
DOI
五维指标
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研究主题发展历程
节点文献
DOPPLER
Frequency
Shift
Second
Order
Statistics
Channel
Estimation
PILOT
OFDM
研究起点
研究来源
研究分支
研究去脉
引文网络交叉学科
相关学者/机构
期刊影响力
通讯与网络(英文)
季刊
1949-2421
武汉市江夏区汤逊湖北路38号光谷总部空间
出版文献量(篇)
427
总下载数(次)
0
总被引数(次)
0
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