FPGA implementation of a TVWS up- and down converter using non-power-of-two FFT modulated filter banks

Anis, Vianney and Guo, Jincheng and Weiss, Stephan and Crockett, Louise H. (2019) FPGA implementation of a TVWS up- and down converter using non-power-of-two FFT modulated filter banks. In: 27th European Signal Processing Conference, 2019-09-02 - 2019-09-06.

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    Abstract

    This paper addresses an oversampled filter bank (OSFB) approach to up- and down-convert any or all of the 40 channels in the United Kingdom's TV white space (TVWS). We particularly consider the use of non-power-of-two fast Fourier transforms (FFTs), which provides a greater choice of design parameters over existing OSFB implementations. Using a field-programmable gate array (FPGA) software defined radio (SDR) platform, we compare two different 40-point FFT-based implementations of the system - one fully parallelised, one serialised- with an existing design using a radix-two 64-point FFT in terms of implementation cost and power consumption.