Title :
Performance analyses of communications receivers employing wavelet-domain minimum mean-squared error equalizers
Author :
Vaz, Canute ; Daut, David G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rutgers, State Univ. of New Jersey, Piscataway, NJ, USA
Abstract :
In this paper the strategy of Minimum Mean-Squared Error (MMSE) equalization of Discrete Wavelet Transform (DWT) coefficients of received signals is applied in communications receivers. Specifically, the performance of such wavelet-based receivers under a diverse range of conditions is systematically evaluated with the use of Monte Carlo simulations. To determine the robustness of this new type of receiver processing strategy multipath fading channels, four different wavelets, and 16-symbol Quadrature Amplitude Modulation (16-QAM) are used. All faded signals are corrupted with Additive White Gaussian Noise (AWGN). For each case the system performance is quantified by Symbol Error Rates (SERs) obtained from the Monte Carlo simulations. The resulting SER curves show that the performance of DWT-based MMSE equalization is similar to the method implemented in discrete time-domain. Hence, DWT-based MMSE equalization is an effective and practicable technique that can be used in communications receivers. In particular the method can be used in agile radio receivers built upon a wavelet-domain signal processing platform.
Keywords :
AWGN; Monte Carlo methods; discrete wavelet transforms; equalisers; fading channels; least mean squares methods; quadrature amplitude modulation; radio receivers; 16-QAM; 16-symbol quadrature amplitude modulation; AWGN; DWT coefficients; DWT-based MMSE equalization; Monte Carlo simulations; SER curves; additive white Gaussian noise; agile radio receivers; communications receivers; discrete time-domain; discrete wavelet transform; faded signals; multipath fading channels; received signals; symbol error rates; wavelet-based receivers; wavelet-domain minimum mean-squared error equalizers; wavelet-domain signal processing; Discrete wavelet transforms; Equalizers; Filter banks; Low pass filters; Receivers; Time domain analysis; MMSE; Wavelet transform; channel equalization; communications receiver;
Conference_Titel :
Signal Processing and Communication Systems (ICSPCS), 2011 5th International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4577-1179-4
Electronic_ISBN :
978-1-4577-1178-7
DOI :
10.1109/ICSPCS.2011.6140875