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| Blind Channel Estimation for UWB Systems Based on the Cyclic Convolution Property of the Receive Signal’s Expectation |
| Zhu Xing-tao Liu Yu-lin Zhao Xiang |
| DSP Lab, Chongqing Communication College, Chongqing 400035, China |
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Abstract In this paper, a novel blind channel estimation algorithm based on tap detecting is proposed for the chip-rate discrete channel of the TH-PPM Ultra Wide-Band(UWB) communications. In this algorithm, the cyclic convolution property of the receive signal’s expectation is used to model the question of channel estimation, and the sparse and cluster structure of UWB channel is used to avoid non-important zero taps’ estimation which promoted the performance of the algorithm. Simulation results demonstrated that the mean square error of the UWB-TDLS is 5.5dB’s lower than UWB-LS in the situation of low signal to noise ratio(0-15dB), while it is 3.5dB lower in the situation of high signal to noise ratio(>15dB), moreover the UWB-TDLS also has better signal-error-ratio performance than UWB-LS.
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Received: 17 May 2007
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Corresponding Authors:
Zhu Xing-tao
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2008, Vol. 30 
