chunmei.kang1's articles:

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using FFT as a channelizer #2 2 46 (10/21/2009 4:55:51 PM) comp.dsp Hi, I am learning multi-channel DDC techniques using FFT. My design is referenced to http://www.pentek.com/tutorials/15_4/digdown.cfm Something in this design I do not understand. The FFT will split the input... gobruins

using FFT as a channelizer 0 33 (10/20/2009 11:48:01 PM) comp.dsp Hi, I am learning multi-channel DDC techniques using FFT. My design is referenced to http://www.pentek.com/tutorials/15_4/digdown.cfm Something in this design I do not understand. The FFT will split the input... gobruins

Timing recovery design in PSK demodulation 5 22 (5/27/2009 9:46:00 PM) comp.dsp Hi, We are building a multichannel Q/8PSK demodulation system, we have completed the carrier recovery design, and in the process of designing a timing recovery loop to build a stable symbol clock. We have a co... gobruins

Noise figure measurement 13 30 (3/31/2009 3:42:04 PM) comp.dsp we are trying to measure the noise figure for our receiver, but seems the receiver output noise power is too low to measure. Here is the receiver configuration: RF+ADC+DDC(digital down converter) the total RF ... gobruins

2D FFT window function 3 33 (3/6/2009 1:04:13 PM) comp.dsp I have some questions about length of windowing functions applied to 1D and 2D FFT. For a N point 1D FFT, it is very straightforward, I can generate a N point window function, and multiply it with the signal be... gobruins

chunmei.kang1's replies:

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2D FFT window function 3 33 (3/6/2009 1:04:13 PM) comp.dsp I have some questions about length of windowing functions applied to 1D and 2D FFT. For a N point 1D FFT, it is very straightforward, I can generate a N point window function, and multiply it with the signal be... chunmei.kang1 (12)

Noise figure measurement 13 30 (3/31/2009 3:42:04 PM) comp.dsp we are trying to measure the noise figure for our receiver, but seems the receiver output noise power is too low to measure. Here is the receiver configuration: RF+ADC+DDC(digital down converter) the total RF ... chunmei.kang1 (12)

using FFT as a channelizer #2 2 46 (10/21/2009 4:55:51 PM) comp.dsp Hi, I am learning multi-channel DDC techniques using FFT. My design is referenced to http://www.pentek.com/tutorials/15_4/digdown.cfm Something in this design I do not understand. The FFT will split the input... chunmei.kang1 (12)