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The channel equalization is a technique allowing to remove the inter-symbol interference (ISI) in the SDR receiver caused by the radio-mobile channel. In this paper, present a design and implementation of modem with 16-QAM modulation, convolution, interleaved circuit, differential coding and adaptive equalizer using LMS algorithm based of SDR, using MATLAB system generator model. The results show that LMS equalizer gives a good estimation on the proposed channel model. The hardware implementation is done in FPGA board kit, which has shown a promising foundation for developing coding, modulating and other circuit of modems circuits.

The effect of using channel equalizer in the SDR Modem