Parth Vakil (@vakilp)

Parth is an Electrical Engineer at Naval Research Lab in Washington DC. He graduated with a Masters in Electrical Engineering with a concentration in DSP from University of Maryland. He has been working in the field of communications, networks and signal processing for the last 5 years.

Instantaneous Frequency Measurement

Parth Vakil ● February 4, 2008●21 comments

Measuring carrier frequency quickly and with minimal data matters in radar and signal characterization. Parth Vakil explains the delay-and-multiply instantaneous frequency measurement technique, shows how analytic signals and multiple delays resolve the 2π ambiguity, and demonstrates noise, phase-wrapping, and interferer effects using MATLAB code. He also outlines practical mitigations like phase unwrapping and channelization.

Modelling a Noisy Communication Signal in MATLAB for the Analog to Digital Conversion Process

Parth Vakil ● October 30, 2007●13 comments

Practical signal modeling treats receiver noise as a fixed power source, not something tied to the transmitted waveform. Parth demonstrates why using MATLAB's awgn(sig,SNR,'measured') can misrepresent an analog front end and provides a short function that scales your signal so the added AWGN produces the desired receiver noise variance. This prepares realistic inputs for upcoming ADC simulations.

Hello and Introduction

Parth Vakil ● September 14, 2007●1 comment

Parth Vakil introduces a personal DSP journal built to capture techniques he has worked through and to share them with the community. He plans to focus on how methods behave in practice, with just enough math to point readers toward the right references. Digital receivers will be one of the first topics, along with occasional MATLAB functions and FPGA code.

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