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Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems

Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems,Huseyin Arslan,Sharath Reddy

Noise Power and SNR Estimation for OFDM Based Wireless Communication Systems   (Citations: 7)
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In this paper, noise power and signal-to-noise ratio (SNR) estimations for OFDM based wireless communication sys- tems are studied. Noise power estimation, which takes into account the color and variation of noise statistics over OFDM sub-carriers into account, is considered. Instead of averaging the instantaneous noise samples estimates over all of the OFDM sub-carriers, dividing the total number of sub-carriers into several sub-groups and averaging the sub-carriers separately within each sub-group is proposed. Also, these averaged estimates over each sub-group are fur- ther averaged across several OFDM symbols in time to en- hance the performance of the noise power estimates. The proposed solution provides many local estimates, allow- ing tracking of the variation of the noise statistics across OFDM sub-carriers, which is particularly of use in sub- band adaptive modulation OFDM systems. The perfor- mance of the proposed method is evaluated via computer simulations. It is observed that the proposed solution can estimate local statistics of the noise power when the noise is colored. When the noise is white, the proposed algorithm works as good as the conventional noise power estimation schemes, showing the robustness of the proposed method.
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    • ...Several SNR estimator algorithms have been proposed in the past[l][2][3][4] , while these methods can't meet three criteria of good SNR estimator at the same time...

    Yongxu Zhuet al. Implementation of high precision and low cost SNR estimator for wirele...

    • ...Therefore, instead of implementing fixed information rate for all levels of channel quality, variable rates of information transfer can be used to maximize system resource utilization with high quality of user experience [2]...
    • ...The suggested method can be used Additive White Gaussian Noise (AWGN) channel and for color dominated channel, in which the noise power varies across the frequency spectrum [2]...

    Rana Shahid Manzooret al. Implementation of FFT using discrete wavelet packet transform (DWPT) a...

    • ...Therefore, instead of implementing fixed information rate for all levels of channel quality, variable rates of information transfer can be used to maximize system resource utilization with high quality of user experience [2]...
    • ...This estimator proposed by S. Reddy in [2] was originally formulated to investigate the performance of the estimator in colored noise dominated channel, in which the noise power varies across the frequency spectrum...

    Rana Shahid Manzooret al. A novel noise power and SNR estimation in WiMAX systems

    • ...Several SNR estimation algorithms have been suggested in the past [1],[2],[3],[4],[5] and have been successfully implemented previously in OFDM systems by making use of the pilot symbols that are inserted in the OFDM symbol...
    • ...This estimator proposed by S. Reddy in [2] was originally formulated to investigate the performance of the estimator in colored noise dominated channel, in which the noise power varies across the frequency spectrum...

    Rana Shahid Manzooret al. Front-end estimation of Noise Power and SNR in OFDM systems

    • ...Therefore, instead of implementing fixed information rate for all levels of channel quality, variable rates of information transfer can be used to maximize system resource utilization with high quality of user experience [2]...
    • ...Many SNR estimation algorithms have been suggested in the last ten years [1]-[6] and also successfully implemented in OFDM systems using the pilot symbols [1,2,5]...
    • ...SNR estimator, presented in the past, performed SNR estimation using pilot symbols at the back-end of the receiver in the OFDM system [2]...
    • ...The suggested method can be used Additive White Gaussian Noise (AWGN) channel and for color dominated channel, in which the noise power varies across the frequency spectrum [2]...

    Rana Shahid Manzooret al. Dwpt Based FFT and ITS Application to SNR Estimation in OFDM Systems

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