Comparative analysis for various parametric attributes for an optimized DUC/DDC
In present digital communication system, sample rate conversion plays a crucial role in every aspect. Multirate signal processing can be realized by using Digital up/down converters. In this paper, an optimized model for digital up/down converter is analysed on the basis of various parametric attributes such as different interpolation/decimation factors, cascading of filters, adding delay element and number of sections in the CIC filter (N). The input signal in the range of 300–4000 Hz is sampled at 100 kHz. Further, the sampled signal is passed on to CIC filters along with a CIC compensator. The signal is either upsampled or downsampled by a factor of 12. Then, the up/down sampled signal is modulated with a high frequency carrier signal of 600 kHz generated using a direct digital synthesizer. The obtained output signal is an up/down sampled signal. The output is analysed for different parametric aspects to achieve an improvised Digital up/down converter. These filters are designed and simulated using MATLAB Simulink 2014a.