KEYWORDS: Field programmable gate arrays, Digital signal processing, Digital filtering, Signal processing, Global system for mobile communications, Linear filtering, Data communications, Electronics, Receivers, Phase shifts
In radio receivers, Digital Down Converters (DDC) are used to translate the signal from Intermediate Frequency
level to baseband. It also decimates the oversampled signal to a lower sample rate, eliminating the need of a high end
digital signal processors. In this paper we have implemented architecture for DDC employing CORDIC algorithm, which
down converts an IF signal of 70MHz (3G) to 200 KHz baseband GSM signal, with an SFDR greater than 100dB. The
implemented architecture reduces the hardware resource requirements by 15 percent when compared with other
architecture available in the literature due to elimination of explicit multipliers and a quadrature phase shifter for mixing.
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