TY - GEN
T1 - Optimization of SNR estimation in decibel domain over communication channels
AU - Luo, Tao
AU - Ko, Young Chai
PY - 2004
Y1 - 2004
N2 - A novel signal estimator is proposed to estimate the signal value in decibel (dB) domain. The basic idea of the proposed estimator is to combine the averages of the linear domain and log domain with certain weights on averaging of each domain. In this paper, we show that the proposed method can cancel the bias resulting from the linear/log domain estimators alone and we obtain the analytical forms for the optimum combination weights for static and single path fading case. We apply the proposed method to average signal-to-noise ratio (SNR) estimation in WCDMA systems where samples are no longer i.i.d. In that case, while the optimum estimator does not work well, the proposed method is very robust to the channel models in terms of number of multipath and different Doppler spreads: the proposed method provides a much larger linearity range of average SNR compared with the most widely used sample mean estimator.
AB - A novel signal estimator is proposed to estimate the signal value in decibel (dB) domain. The basic idea of the proposed estimator is to combine the averages of the linear domain and log domain with certain weights on averaging of each domain. In this paper, we show that the proposed method can cancel the bias resulting from the linear/log domain estimators alone and we obtain the analytical forms for the optimum combination weights for static and single path fading case. We apply the proposed method to average signal-to-noise ratio (SNR) estimation in WCDMA systems where samples are no longer i.i.d. In that case, while the optimum estimator does not work well, the proposed method is very robust to the channel models in terms of number of multipath and different Doppler spreads: the proposed method provides a much larger linearity range of average SNR compared with the most widely used sample mean estimator.
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M3 - Conference contribution
AN - SCOPUS:21444461284
SN - 0780386396
T3 - Proceedings of 2004 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2004
SP - 822
EP - 827
BT - Proceedings of 2004 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2004
A2 - Ko, S.J.
T2 - Proceedings of 2004 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2004
Y2 - 18 November 2004 through 19 November 2004
ER -