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Proof of Correlation Theorem for DFT

Started by bitrandre 1 month ago4 replieslatest reply 1 month ago107 views
Goodmorning to everyone. I was trying to understand the proof of the cross-correlation theorem for the DFT given in the dsprelated website. It defines the cross-correlation between...

Upward Compressor Soft Knee Equation

Started by rjmiller927 1 month ago4 replieslatest reply 1 month ago87 views
I am working on a Python function to perform audio dynamic range compression using an upward compressor (https://en.wikipedia.org/wiki/Dynamic_range_compre...)....

equalizer algorithm used for differential qpsk & fractionally spaced equalizer

Started by ntniitm 1 month ago1 replylatest reply 1 month ago71 views
I am trying to build an application which uses Differential BPSK /Differential QPSK modulated on to a chirp signal. (S2C method). The modulation is multiplication...

Blind De Reverberation

Started by jalopez14 1 month ago5 replieslatest reply 1 month ago75 views
I am currently doing some research into automatically removing reverb from audio files related to cleaning up speech. Is there any pointers you guys can share?...

Auto-Correlation based Carrier Frequency Recovery

Started by julein 1 month ago2 replieslatest reply 1 month ago102 views
Hello all,I'm using an auto-correlation based frequency recovery algorithm in the receiver to extract and correct the carrier frequency offset between the transmitter...

Digital Filters that have prescribed phase shift

Started by CharlieRader 1 month ago14 replieslatest reply 1 month ago133 views
Almost sixty years ago I needed an all-pass recursive digital filter with two outputs, such that the phase difference between the outputs was a very good approximation...

Question regarding CIC filter

Started by aminnoura 2 months ago12 replieslatest reply 1 month ago119 views
I read nice discussions on this forum about CIC filters and that's why I also joined. I am not expert in DSP. I am programmer and I need to write a CIC filter for...

Why low number of subcarriers is needed for high path loss scenarios​ ?

Started by cogwsn 2 months ago8 replieslatest reply 2 months ago67 views
In one of the papers related to 5G numerology, I read this statement: "Low number of subcarriers is needed for high path loss scenarios because higher number of...
Hello everyone!I successfully designed the wideband frequency hopped OFDM+BPSK system where I use multiple DUCs and DDCs to achieve up and down-conversion to and...

One raised cosine filter vs two cascaded root raised cosine filters

Started by jonmcleod2003 2 months ago12 replieslatest reply 2 months ago87 views
If I send a random series of symbol impulses (+3.0, +1.0, -1.0, -3.0) through a raised cosine filter (alpha = 0.2, 31 taps), the output contains a filtered, delayed...

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