Forums Update, Tips and Tricks - Please Read!

Started by stephaneb 7 years ago14 replieslatest reply 4 months ago2555 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...

Keyboard Synthesizer

Started by Cedron 1 week ago7 replieslatest reply 6 days ago152 views
Yep, turn your computer keyboard into a music keyboard.  Almost four full octaves.https://forum.gambas.one/viewtopic.php?t=1651This is a project that implements...

Learning Data Transmission for HF Channel

Started by Mannai_Murali 2 weeks ago2 replieslatest reply 2 weeks ago120 views
I am trying to learn data transmission through HF Channel for various multi path and fading conditions.I will be designing and coding for simulation.I am planning...

An Online Mathematics Reference Book

Started by Rick Lyons 3 months ago17 replieslatest reply 2 weeks ago511 views
Some of the "ol' timers" here may remember the valuable and popular book titled "CRC Standard Mathematical Tables" published by the Chemical Rubber Co., in Cleveland...

meaning of M(QN) notation

Started by jbrower 2 weeks ago2 replieslatest reply 2 weeks ago144 views
Hi all-Does anyone know what M(QN) notation means ? For example 15(Q16) ?I'm familiar with QN, QN.M, but not with a leading number followed by parens. I suspect...

arm_fir_decimate cycles

Started by ErcSic71 1 month ago9 replieslatest reply 1 month ago160 views
Hi All,I need to convert a (fixed point) stereo 16bit/32kHz stream into stereo 16bit/16kHz (on a Cortex M4). For this I have successfully used the CMSIS-DSP function arm_fir_decimate_q15()....

IFFT of Non causal signal?

Started by r13yadav 1 month ago3 replieslatest reply 1 month ago164 views
Hi,I have a frequency domain data (that is non-causal). How can I calculate the IFFT in MATLAB so that I can visualize the impulse response behavior of t<0.Thanks...

How can I estimate the 2 parameters of this signal?

Started by weetabixharry 1 month ago18 replieslatest reply 1 month ago157 views
I have a digital signal of fixed length (e.g. 100 samples). Somewhere within this signal is a contiguous region characterized by "low variance". The remainder of...

Rice channel + AWGN with lower BER than AWGN alone ??

Started by roblkc3 3 years ago7 replieslatest reply 2 months ago216 views
Hello!I am playing with the Matlab simulation of an OFDM-based modem I have created, and I am facing a weird problem: I have my frames pass through the "usual encoding/mapping/modulation/IFFT",...

FFT-Based Equation Error Method - JOS

Started by molem7b5 5 months ago4 replieslatest reply 2 months ago220 views
Hi,  I'm currently trying to implement the FFT-based equation method for filter design outlined by JOS, details of which can be found here. Specifically, I'm...

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