Title :
A comparison of two blind equalization algorithms for broadband indoor wireless communications
Author :
He, Lin ; Malkemes, Robert ; Reed, Charles, Jr. ; Amin, Moeness G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Villanova Univ., PA, USA
Abstract :
A performance comparison of the constant modulus algorithm (CMA) and the stop-and go algorithm (SGA) for blind adaptive equalization is presented. The performance evaluation is provided under indoor wireless channels using both transient and steady-state behaviors of the mean square error (MSE). A channel model is developed based on spectral observations of the unlicensed U-NII frequency band. The channel is time-varying and exhibits frequency selective fading. A receiver is implemented as two feed forward equalizers with one decision feedback equalizer. While the CMA is successful in achieving good performance, the SGA is much superior and more robust in low signal-to-noise ratio environments
Keywords :
adaptive equalisers; blind equalisers; broadband networks; decision feedback equalisers; fading channels; feedforward; indoor radio; mean square error methods; noise; radio networks; radio receivers; time-varying channels; CMA; DFE; MSE; SGA; SNR; blind adaptive equalization; blind equalization algorithms; broadband indoor wireless communications; channel model; constant modulus algorithm; decision feedback equalizer; feed forward equalizers; frequency selective fading; indoor wireless channels; mean square error; signal-to-noise ratio; spectral observations; steady-state behavior; stop-and go algorithm; time-varying channel; transient behavior; unlicensed U-NII frequency band; Adaptive equalizers; Blind equalizers; Decision feedback equalizers; Fading; Feeds; Frequency; Mean square error methods; Robustness; Signal to noise ratio; Steady-state;
Conference_Titel :
Signal Processing and its Applications, Sixth International, Symposium on. 2001
Conference_Location :
Kuala Lumpur
Print_ISBN :
0-7803-6703-0
DOI :
10.1109/ISSPA.2001.950191
