Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 2 years ago10 replieslatest reply 5 months ago821 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...

OFDM Constellation.

Started by SenSen 1 hour ago7 replieslatest reply 16 minutes ago20 views
Currently testing Blind Demodulation methods on recorded OFDM signal. The recordings were done with coax cables. While the estimated Frequency and Time shifts were...

Explanation about MRC behavior when one branch fails to detect the signal

Started by cogwsn 1 day ago3 replieslatest reply 1 day ago39 views
I am working on hardware implementation of Maximal Ratio Combiner for OFDM based system. Consider a two antenna receiver performing MRC over received signals y1...

How to cancel REALLY heavy echo?

Started by dudelsound 6 days ago8 replieslatest reply 1 day ago66 views
HiI am designing the echo-cancelling/removal algorithm of a speakerphone device and am trying to get ideas on how to improve the performance.I know, physics are...

Machine learning and detection in noise

Started by techn0mad 1 week ago4 replieslatest reply 2 days ago92 views
I've been tinkering with a problem involving detecting a set of tones in the presence of noise. I've looked at Goertzl and matched filter approaches, but I've had...

Learning FPGA

Started by stephaneb 2 weeks ago15 replieslatest reply 2 days ago848 views
A few months ago, this community tackled the first FPGA FAQ titled When (and why) is it a good idea to use an FPGA in your embedded system design?.  Your contributions...

Hot DSP Topics 2018

Started by stephaneb 6 days ago5 replieslatest reply 5 days ago351 views
It's been more than 20 years since I submitted my EE master thesis about implementing a "feedforward" active noise cancellation algorithm (nlms) for headphones on...

CMSIS CFFT bit reversal table -how to generate?

Started by mjbcswitzerland 2 weeks ago5 replieslatest reply 1 week ago54 views
Hi All The ARM CMSIS  FIXED POINT FFTs uses a bit reversal table at the end of the FFT calculation to transpose the output bins to their linear ordering....

How to set filter specification for Decimation process

Started by gabrics 1 week ago10 replieslatest reply 1 week ago71 views
Hi, i'm new to DSP so i'd like to understand something about decimation. This is what i have : a sinusoidal signal,about 200MHz sampled with a 500 MSPS ADC then...

High-cost communications in the old days -- telegrams

Started by neirober 2 months ago10 replieslatest reply 2 weeks ago81 views
I've been reading a P.G. Wodehouse book (Right-Ho, Jeeves) that has several fictional telegrams in it.  For example:Fink-Nottle, Brinkley Court, Market Snodsbury,...

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