Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 6 months ago4 replieslatest reply 4 months ago314 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...

Subharmonic distortion?

Started by dszabo 22 hours ago9 replieslatest reply 6 hours ago59 views
So I measured something the other day that I couldn't quite get my head around.  I've convinced myself that I should be able to explain it, so I wasn't going to...

sum of sinusoids

Started by Sharan123 2 days ago16 replieslatest reply 8 hours ago117 views
I would like to know the consequence of adding 2 sinusoids of different frequencies. I assume that the result is not a pure sinusoid. I have tried a octave example...

ZigBee Preamble

Started by cogwsn 2 months ago4 replieslatest reply 10 hours ago91 views
Hello, In ZigBee (802.15.4), is there a preamble like WiFi (STS, LTS). I have not studied much details, but from first view it looks like there are sequence of...

Xcorr versus Correlation through toeplitz matrix

Started by msalmanrashed 16 hours ago42 views
Hi all I am working on correlations and came across a query. If we calculate xcorr of M signals of length N each, we get an output matrix of size (2N-1)xM^2. however,...

Semi-blind OFDM channel estimation.

Started by SenSen 1 week ago11 replieslatest reply 2 days ago66 views
Hello. I am currently working on a semi-blind #OFDM channel estimation. After analyzing the recorded signal(sampling frequency is known), and deriving the following...

Cross talk in ADC channel due to noise on PCB

Started by fatimak 3 days ago5 replieslatest reply 2 days ago73 views
Hi,    I am working on a board with 4 Dual-Channel ADC ADS42LB69 and though the ADC has a 100 dB channel isolation the cross talk on the channels due to PCB noise...

Spectrum Sensing HW.

Started by SenSen 2 weeks ago7 replieslatest reply 6 days ago93 views
I am interested to use an existing hardware to perform a spectrum sensing/monitoring in the frequency range of 2.2-2.6[Ghz]. Taking into account that the 802.11ac...

Filtering of amplitude spectrum

Started by bachhavpramod 1 week ago7 replieslatest reply 7 days ago91 views
Hello,I want to perform moving average on the amplitude spectrum of a speech signal frame (abs(fft(sig))) in the particular frequency range (e.g. 4-8kHz, Fs=16kHz)....

Back to back CIC filters

Started by flutekick 1 week ago27 replieslatest reply 1 week ago93 views
Hi,If I have to design a decimation filter for a 4-bit sigma-delta ADC, decimation factor say 6, I plan to split the filter into 2 stages of CIC filtering (first...

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