Abstract
Communication systems use the concept of transmitting information using the electrical distribution network as a communication channel. To enable the transmission data signal modulated on a carrier signal is superimposed on the electrical wires. Typical power lines are designed to handle 50/60 Hz of AC power signal; however they can carry the signals up to 500 KHz frequency. This work aims to aid transmission/reception of an audio signal in the spectrum from 300 Hz to 4000 Hz using PLCC on a tunable carrier frequency in the spectrum from 200 KHz to 500 KHz. For digital amplitude modulation the sampling rate of the carrier and the audio signal has to be matched. Tunable carrier generation can be achieved with Direct Digital Synthesizers at a desired sampling rate. DSP Sample rate conversion techniques are very useful to make the sampling circuits to work on their own sampling rates which are fine for the data/modulated-carrier signal's bandwidth. This also simplifies the complexity of the sampling circuits. Digital Up Conversion (DUC) and Digital Down Conversion (DDC) are DSP sample rate conversion techniques which refer to increasing and decreasing the sampling rate of a signal respectively.
Highlights
This paper focuses on Design and ASIC Implementation of Digital up-converter and Down converter for communication applications at 65nm technology
Based on the work done on low power ASIC implementation of Digital Up Conversion (DUC) and Digital Down Conversion (DDC) and results achieved, the below listed conclusions are drawn:
Multi-VDD low power technique is successfully deployed on DUC and DDC designs
Summary
This paper focuses on Design and ASIC Implementation of Digital up-converter and Down converter for communication applications at 65nm technology. Digital up-conversion and downconversion are well known sample rate conversion processes in Digital Signal Processing. These techniques are widely used for converting a baseband signal to band pass signal and vice-versa to enable the transmission and reception. For the baseband signal to be transmitted, it needs to be modulated on to an IF/RF carrier frequency. The base band signal, whose sample rate might be very less compared to IF/RF carrier signal sampling rate, needs to have the sampling rate to match the IF/RF carrier signal sampling rate. In case of receivers the sample reduction helps to reduce the processing complexity of the received baseband signal.
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