Utility of Bit Reversal as (I)FFT Function Parameter

Started by dszabo 4 months ago8 replieslatest reply 4 months ago86 views
As a follow up to a post I made on stackexchange [here][1].  In reference to the CMSIS/DSP Float32 FFT implementation, found [here][2], starting on line ```1162```....

LTE Uplink Timing

Started by Mannai_Murali 4 months ago3 replieslatest reply 4 months ago71 views
In LTE Uplink timing is calculated at Base Station using cross correlation of PRACH when UE joins the network.Can I use Demodulation reference signal of two successive...

fractional delay filter for non real time applications ?..

Started by alexsunny123 4 months ago6 replieslatest reply 4 months ago94 views
Hello,Hi guys,I would like to create fractional delay filter that can be applied on a signal for non real time applications. My approach is to apply a linear phase...

Power mapping from analogue domain(dBm) to digital domain

Started by kaz 4 months ago7 replieslatest reply 4 months ago123 views
Hi All, A standard says “-152dBm RF power should map to 1 LSB digital domain (at final stage). In our case by the digital domain I mean the following stages:...

The size of an FIR filter for PDM-PCM conversion

Started by caduk84 9 months ago15 replieslatest reply 4 months ago349 views
I have been trying to understand how the conversion from PDM to PCM happens so that I could interface with a microphone. I have been doing some research online and...

Low-pass filter image data

Started by Tim Wescott 4 months ago11 replieslatest reply 4 months ago112 views
I have some image data that I want to smooth out, but I want it to smooth out nicely to the edges.Fourier transforms wouldn't do this without windowing -- if you...

Multi-filter Parks McClellan algorithm

Started by woodpecker 4 months ago13 replieslatest reply 4 months ago119 views
Hi everyone,  There are of course, many situations where the design of a single linear-phase FIR filter may be accomplished using the Parks McClellan algorithm....

Autocorrelation of OFDM Signal ?..

Started by alexsunny123 4 months ago3 replieslatest reply 4 months ago109 views
Hello,I have captured OFDM I-Q data at IF. I have down-converted to it to base-band and then simply performed autocorrleation. I was trying to find a clear peak...

hardware FFT coefficients .vs. np.numpy.fft.rfft

Started by Justinm 4 months ago13 replieslatest reply 4 months ago185 views
We have a FPGA system which takes input from an ADC and calculates a FFT. The system identifies the location of our frequencies of interest and sends the coefficients...

PMCW Radar for cars

Started by adaptivefilter 4 months ago5 replieslatest reply 4 months ago209 views
Hello.Does anybody working in the automotive radar sector know and can tel me if Phase Modulated Continuous Wave Radar is gaining popularity for mm-wave car radars...

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