Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 4 months ago4 replieslatest reply 2 months ago262 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...

Adjustment of window length with sliding/moving RMS method for frequency drifts

Started by johnny_smith911 1 day ago15 replieslatest reply 5 hours ago44 views
I'm using a sliding RMS mechanism to compute RMS of a signal, i.e. with a window size of N, I add the squared value of the new sample x(n) to the running total while...

Filter design

Started by Sharan123 2 days ago14 replieslatest reply 13 hours ago103 views
Pardon me if my question is very basic.I would like to know why in the design of an Filter in Matlab, one has to specify sampling frequency.It looks like the cut-off...

Frequency multiplication in the digital domain

Started by dbarber 3 weeks ago11 replieslatest reply 23 hours ago98 views
I need some DSP advice on how to. I have an input sine waveform that varies in the range from 10Hz to 100kHz. I need to multiply the frequency of the input sine...

Interpolation and filter gain

Started by LabPe43 3 days ago5 replieslatest reply 2 days ago77 views
I came across an application note from xilinx dated back to October 29, 2008 titled "3GPP LTE Digital Front End Reference Design" from Helen Tarn, Ed Hemphill and...

ZigBee Preamble

Started by cogwsn 3 days ago2 replieslatest reply 2 days ago58 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...

Measuring Allan Variance of atomic clock

Started by bmcgee22 4 days ago13 replieslatest reply 2 days ago53 views
I need to measure the Allan Variance of 2-3 atomic clocks for a remote application, so can't use the traditional test equipment.  We need to collect the data over...

Any fancy idea for an algorithm ?

Started by LucasLsr 5 days ago14 replieslatest reply 3 days ago97 views
Hi everyone ,I'm looking for ideas in order to implement an algorithm that would be able to compare these 2 plots, these are 3D data. I work with Matlab.Of course...

AM/PM of a RF power amplifier

Started by Lucky_12 1 week ago4 replieslatest reply 3 days ago52 views
The AM/PM characteristic of a RF power amplifier graphs the phase difference of the input and the output signal in dependance of the amplitude of the input signal. I...

Biquad IIR filter for Phase inverting?

Started by vcelkamaja 4 days ago1 replylatest reply 3 days ago47 views
Is it possible to invert phase by using biquad? (2nd order IIR) Rather than swapping speaker terminals in crossover, I would prefer to do in SW. I have found formulas...

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