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Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 8 years ago14 replieslatest reply 1 month ago3015 views
It's been a few months since the launch of the new forums.  Here are a few thoughts. The thumbsup and beer buttons    If there is one thing that could have a...

channeliser of Polyphase filter followed by FFT

Started by kaz 12 hours ago6 replieslatest reply 5 hours ago81 views
Hi,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...

How to design cic digital filter for sigma delta adc

Started by ahhh 7 months ago9 replieslatest reply 1 week ago274 views
My 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...

Far Off Topic: A Simple Geometry Problem That Had Me "Going in Circles"

Started by Rick Lyons 6 years ago12 replieslatest reply 2 weeks ago668 views
At 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...

Using STO as a proxy for accurate CFO compensation

Started by robhhh6 3 weeks ago6 replieslatest reply 2 weeks ago109 views
Hello!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"...

Detecting Peaks (Part Deux)

Started by bigalnz 4 weeks ago9 replieslatest reply 4 weeks ago209 views
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 Souparnika512 4 months ago11 replieslatest reply 1 month ago151 views
I'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...

FPGA dev kit

Started by Robert Wolfe 1 month ago4 replieslatest reply 1 month ago228 views
Hello,I've been wanting to get my feet wet in FPGA DSP, after many years strictly firmware (C, C++, assembly), including since a good deal of DSP seems to be migrating...

Setting prominence in signal.find_peaks

Started by bigalnz 2 months ago3 replieslatest reply 1 month ago135 views
I am rocessing a radio signals on a Rpi5 with a Software Defined Radio (SDR) in python and need to adaptively set the prominence parameter of scipy signal.find_peaks.The...

Quantizing the feedback coefficient in the Goertzel algorithm

Started by gretzteam 2 years ago3 replieslatest reply 1 month ago239 views
The value of the feedback coefficient in the Goertzel algorithm it given by:c = 2*cos( 2*pi*k/N); where k is the bin number and N is the number of points.Here...

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