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Help identify filter type

Started by Vinzz 9 months ago6 replieslatest reply 9 months ago176 views
I have a software filter that multiplies the input signal with a sine and cosine wave (I,Q). After multiply the complex output is square rooted to get the amplitude.What...

Pre-add for transposed FIR

Started by kaz 9 months ago16 replieslatest reply 9 months ago210 views
Hi All,FIR Pre-add (folded) structure is useful to save multipliers. I can see no problem with pre-add direct FIR structure as all that is needed is fold the data...

What is the relationship between z-transform and frequency response of the signal?

Started by runinrainy 9 months ago4 replieslatest reply 9 months ago294 views
Hello,I am trying to understand  intuitively the relationship of the zeros of the z-transform of a discrete time signal and it's frequency domain representation....

Keyboard Synthesizer

Started by Cedron 10 months ago7 replieslatest reply 10 months ago238 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 11 months ago2 replieslatest reply 11 months ago167 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 1 year ago17 replieslatest reply 11 months ago577 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 11 months ago2 replieslatest reply 11 months ago198 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 11 months ago9 replieslatest reply 11 months ago289 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 12 months ago3 replieslatest reply 11 months ago221 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...

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