Sigma-Delta Modulation Based Adaptive Channel Equalizer Based on Wiener–Hopf Equations
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Recenlty, short word length DSP systems are proposed and reported that they outperform compared to their counterpart multi-bit systems in the sense of area-performance-power analysis. In this continuation, this paper presents the application of sigma-delta modulation (SDM) in the design of adaptive channel equalizer using the Wiener filter for wireless and underwater acoustic communication (UWA). To validate the application, various aspects of design are taken into consideration and comparison is carried out with contemporary (i.e., multi-bit) approach. Besides, FPGA based implementation of SDM based design and conventional approach is also carried out to endorse the proposed algorithm to be used in hardware based implementation. The results given in terms of area -perfromance analysis show that proposed algorithm works as desired and it opens the way of using the sigma-delta modulation in adaptive signal processing domain for UWA that has remained a quite challenging task ever before.
KeywordsSigma-delta modulation Short word length systems Acoustic communication Wiener–Hopf FPGA
This research work is supported by the Higher Education Commission (HEC), Pakistan under the National Research Program for Universities (NRPU) grant Number 8521 and National Center for Robotics and Automation (NCRA) joint lab titled “Haptics, Human Robotics and Condition Monitoring Systems (HHCMS) Lab” established at Mehran University of Engineering and Technology, Jamshoro.
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