Digital Filters that have prescribed phase shift

Started by CharlieRader 4 months ago14 replieslatest reply 4 months ago144 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 4 months ago12 replieslatest reply 4 months ago124 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...
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 4 months ago12 replieslatest reply 4 months ago88 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...

Matlab, properly using IFFT, FIR Filter Desing

Started by transient 5 months ago16 replieslatest reply 4 months ago143 views
Hello,There is probably an easier way to do this, but I am getting stuck on trying to determine the following FIR filter design.Let's suppose that I have a transfer...

Coherent Combination and SNR improvement

Started by ibrakh1980 4 months ago5 replieslatest reply 4 months ago97 views
Hi All,First, let me start by saying, I feel very silly asking this question but here it goes:Say I have a signal post ADC, and I split that signal and baseband...

Digital down-conversion and cross-talk

Started by krishk24 4 months ago2 replieslatest reply 4 months ago90 views
Hello folksI am looking at the AD9082 for a high bandwidth application. There are 2 Numerically Controlled Osc (NCO) for each ADC core. datasheet is pasted here...

delay error due to quantization

Started by jgruber 4 months ago2 replieslatest reply 4 months ago97 views
Hi guys,I have two random signals (created by matlab randn), where the second signal represents only a delayed version (by a fraction of an integer) of the first...

Root Raised Cosine Filter

Started by jonmcleod2003 4 months ago18 replieslatest reply 4 months ago139 views
Hello.I am experimenting with a soft transmitter and receiver, using DMR modulation.My plans is this. On the transmit side, I generate dibits, filter them with an...

LTE IFFT Sampling and Nyquist Rate

Started by Zack2020 4 months ago6 replieslatest reply 4 months ago96 views
Hello,I started to work as a developer in LTE scheduling area. I was reading OFDM, IFFT procedures, my knowledge of signal processing is not that good and confused...

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