Questions tagged [decimation]
Decimation is a technique for reducing the number of samples in a discrete-time signal.
134 questions
0 votes
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64 views
Help with Python assignment on signal processing
I'll try and detail as much as possible, please ask me if any info is missing in your opinions. in this assigment i created the basic rect signal a[n] such that over the domain [-1000,1000] it's 1 ...
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2 votes
2 answers
316 views
Best Algorithm for Real-Time Decimation by 512 using 9 Half-Band FIR Cascade or Multi-Stage IIR+FIR?
I am implementing a real-time signal processing pipeline that requires decimating a complex-valued signal by 512 efficiently. The primary challenge is ensuring that the decimation and filtering ...
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1 vote
1 answer
4k views
Understanding Polyphase Filter Banks
I'm studying Polyphase Filter Banks (PFB) but am having some difficulty grasping the concept. Let me clarify my understanding. Suppose we have a signal ranging from DC to 1.25 GHz, and each channel ...
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1 vote
1 answer
173 views
Equivalent group delay of a cascade system using multiple stages of IIR filters + downsampling
I'm trying to determine the equivalent group delay that a "broad band" signal (i.e not a tone) will experience while going through a cascade of IIR filters + decimation. The code below shows ...
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1 vote
2 answers
206 views
Farrow filter - Effect of Delta Delay
Looking at the Farrow structure we see that the closer the specific FIR block to the output, the less effect the Delta has on it. When the output of H4 isn't effected at all by the value of the Delta ...
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0 votes
1 answer
540 views
ADC output rate, undersampling and decimation
I have an ADC working with a sample rate of 960 Msps, my signal being located at the 3rd Nyquist region (I am undersampling). Input signal bandwidth is centered at 1200 MHz with a bandwidth of 120 MHz....
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0 votes
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69 views
I'm struggling to understand the FIR Filter and its application
I'm new to GNU Radio, and I was watching this video However, I didn't quite understand the purpose of the FIR Filter. I know what decimation or downsampling is because I have the book "Digital ...
- 15
1 vote
0 answers
65 views
DSP library for Software Defined Radio
Can anyone recommend a good C library for SDR? To be more specific I just need a function in C to compute coefficients for CIC compensation filter (I need to do it in real time, so Matlab is not an ...
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