frequency offset

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Frequency offset estimation using 802.11a short preamble

by Krishna Sankar on March 3, 2008

plot of frequency offset estimate using 802.11a short preamble

From the previous post on OFDM (here), we have understood that an OFDM waveform is made of sum of multiple sinusoidals (also called subcarriers) each modulated independently. In this post, let us try to understand [...]

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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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