first order

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First order digital PLL for tracking constant phase offset

by Krishna Sankar on June 10, 2007

first_order_pll

Considering a typical scenario where there might exist a small phase offset between local oscillator between the transmitter and receiver. Figure 1 : Transmitter receiver with constant phase offset In such cases, it might be desirable [...]

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Sigma delta modulation

by Krishna Sankar on April 3, 2007

In an earlier post, it was mentioned that delta modulator without the quantizer is identical to convolving an input sequence with . Let us first try to validate that thought using a small MATLAB example [...]

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Zero-order hold and first-order hold based interpolation

by Krishna Sankar on March 25, 2007

In problem 9.14 of DSP-Proakis, the objective is to analyze the effect of zero-order interpolation and first-order interpolation to double the number of samples in the sinusoidal while keeping the sampling frequency unchanged. My take: [...]

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