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| SNR Estimation Algorithm Based on Sounding Reference Signal in LTE |
| Yue Guang-rong Tian Hao Yang Lin Li Shao-qian Hu Wu-jun |
| National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China |
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Abstract To support frequency selective scheduling in uplink, Long Term Evolution (LTE) system defines the Sounding Reference Signal (SRS) for channel quality estimation. This paper focuses on the Signal-to-Noise Ratio (SNR) estimation of the SRS. In order to deal with the shortcomings of Boumard’s method and the traditional DFT method, an improved estimation method based on DFT is proposed. This method reduces the energy leakage’s influence of useful signal on high SNR by correcting the noise estimated interval in time domain, thus more accurate SNR estimation can be obtained. Simulation results show that the estimated performance of the proposed method is better than Boumard’s method and traditional DFT method, and the average performance achieves an improvement of over 6 dB in high SNR area.
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Received: 24 June 2013
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Corresponding Authors:
Tian Hao
E-mail: sunny_th@163.com
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2014, Vol. 36 
