Filtering signals with non-uniform sampling rate (staggered PRF)

3 次查看（过去 30 天）
Vitaly Krepak
Vitaly Krepak 2015-7-14
回答： Honglei Chen 2015-7-14
There is an example Ground Clutter Mitigation with Moving Target Indication (MTI) Radar for Phased Array Toolbox. There is used staggered PRF for Doppler ground clutter filtering. And there is somehow calculated such filtering frequency response:
% Calculate the magnitude frequency response for the three-pulse canceller
pf1 = @(f)(1-2*exp(1j*2*pi/prf(1)*f)+exp(1j*2*pi/prf(2)*f));
pf2 = @(f)(1-2*exp(1j*2*pi/prf(2)*f)+exp(1j*2*pi/prf(1)*f));
sfq = (abs(pf1(f)).^2 + abs(pf2(f)).^2)/2;
Cannot you tell me, how was it done? What should I read to understand, how the formula was made?

请先登录，再回答此问题。

回答（1 个）

Honglei Chen
Honglei Chen 2015-7-14
The idea is that the total filter response is the combination of the two individual pulse cancellers. The equation actually plots the power response instead of the magnitude response. The factor of 2 is there to preserve the power. This being said, the subscript may have been messed up in the last term of the two equations. I just tried switching the two indices and even though the result is different, the shape is approximately the same, i.e., only one null across all frequencies.
HTH

类别

在 Help Center 和 File Exchange 中查找有关 Matched Filter and Ambiguity Function 的更多信息

标签

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by