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The Real Implementation of NLMS Channel Equalizer into the System of Software Defined Radio

Keywords: Channel equalizer , modular system PXI , NLMS algorithm , software defined radio.

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Abstract:

This paper deals with modern wireless transmission systems. It focusses on real implementation of NLMS channel equalizer into the system of software defined radio. The authors aimed to conduct a real measurement (BER vs. Eb/No) using modern modular PXI measuring apparatus. This sophisticated measuring system is built by vector-signal generator RF VSG NI PXI-5670 and vector-signal analyzer RF VSA NI PXI-5660. The results of experiments suggest that the channel equalizer with implemented NLMS algorithm has better results (balance between simplicity and performance) than conventionally most used LMS algorithm. This holds true if feasible computational complexity with respect to real time processes is assumed.

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