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channeliser of Polyphase filter followed by FFT
Started by 1 year ago●22 replies●latest reply 1 year ago●1082 viewsHi,I have never done a channeliser. I can understand the classic method of "shift each channel to dc and filter/decimate" or use bandpass filter). I am trying to...
Narrowband filtering for short signals
Started by 1 year ago●6 replies●latest reply 1 year ago●272 viewsTLDR: For short signals, is extracting a narrowband signal with FIR/IIR filters a fool's errand? Specs: signal = 936 samples long, target sinusoid is 50.05 samples...
Is An Analytical Signal Only One with a Positive Frequency?
Started by 1 year ago●9 replies●latest reply 1 year ago●297 viewsQuestion for the crowd: The definition of an "analytical" signal is a complex signal that only has a positive frequency. Would you still call a signal with only...
Minimalist high performance Farrow Filters
Started by 2 years ago●11 replies●latest reply 1 year ago●294 viewsHello,I have an application where I need to resample from one sample rate to another. Pretty sure this will need a delay type or Farrow filter. The ones I am...
Far Off Topic: A Simple Geometry Problem That Had Me "Going in Circles"
Started by 8 years ago●13 replies●latest reply 1 year ago●848 viewsAt a garage sale recently I bought the book "More Marilyn, Some Like It Bright!" for one U.S. dollar. In that book the following simple geometry problem was posedThe...
Hi,I would like to create a fractional order allpass filter but i'm not sure how to do this or if it is even possible.I currently have a 10th order allpass filter...
How to design cic digital filter for sigma delta adc
Started by 2 years ago●9 replies●latest reply 1 year ago●536 viewsMy SD ADC modulator has a sampling frequency of 1.024 MHz, an input bandwidth of 1 kHz, an oversampling ratio of 512, a single-loop second-order structure, and a...
Using STO as a proxy for accurate CFO compensation
Started by 1 year ago●6 replies●latest reply 1 year ago●243 viewsHello!I have an OFDM-based system and I am trying to accurately estimate the Carrier Frequency Offset (CFO) and the Sampling Time Offset (STO).I use the "traditional"...
A question about peak detection for a transient (17ms) CW beep on channelized chunks (0.3 sec chunks) from a SDR.My current approach is to get the Power Spectral...
Issues regarding the implementation of integrator in GMSK modulator
Started by 2 years ago●11 replies●latest reply 1 year ago●317 viewsI'm trying to implement a GMSK modulator using simulink. Initially, I've passed the signal to a Gaussian filter, then it is passed to an integrator, but I'm not...
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