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FMCW RF up-convserion doesn't land at the designated carrier

Started by ninjatuna123 11 months ago3 replieslatest reply 11 months ago188 views
I created a simple FMCW sweep using MATLAB in baseband, BW = 100MHz:sweepTime = 1e-3; % 1 ms sweep BW = 1e8; %100 MHz; fs = 2e8;% 200 MHz sample rate % FMCW waveform:...

Dither question, TPDF vs periodic oscillator

Started by PiterDeVries 11 months ago3 replieslatest reply 11 months ago204 views
Assuming my DAC is 1 million samples per second 12-bit, with the goal of increasing the effective number of bits beyond 12 bit at the expense of reduced sample...

Bandwidth of the Goertzel algorithm

Started by Cuencano 12 months ago18 replieslatest reply 11 months ago357 views
I needed to determine the 3 and 6 dB points of the Goertzel algorithm. While I found many posts here that addressed bandwidth indirectly, they didn’t specifically...

Efficient triaxial sampling of a single frequency signal

Started by hkortier 12 months ago11 replieslatest reply 12 months ago242 views
I have a single frequency (100kHz) magnetic wave (known power) signal measured by three, orthogonally sensitive, placed sensors (coils in x,y,z direction). The...

OFDM receiver IQ processing

Started by jekain314 1 year ago9 replieslatest reply 12 months ago369 views
The OFDM receiver front end operates on a real signal from the antenna. The receiver's IQMixer both downconverts the received signal to baseband and transforms the...

Carrier frequency offset (CFO) in OFDM with the real part of IFFT

Started by ziwukim 1 year ago10 replieslatest reply 1 year ago343 views
In the IEEE 1902.2 narrow-band OFDM PLC standard, the IFFT is performed but only the real parts are taken for the transmission while discarding the imaginary parts...

Help with Shannon-Nyquist Reconstruction Artifacts in Interactive DSP Tool

Started by Theau 1 year ago4 replieslatest reply 1 year ago263 views
Hello DSPrelated community,I'm developing an interactive web application for learning DSP concepts as part of a university project (project overview: https://thierrydutoit.github.io/iDSP/)....

A Query about "Improvements to the Sliding DFT Algorithm"

Started by etheory 1 year ago7 replieslatest reply 1 year ago345 views
Hi all! My first post here! Long time lurker first time poster. This one is kinda specifically directed at @RickLyons but happy for anyone to answer. I am reading: https://www.researchgate.net/publication/352874961......

Circular convolution

Started by RoelVugts 1 year ago10 replieslatest reply 1 year ago497 views
When performing an FFT, modifying the magnitude spectrum in some arbitrary way, and then applying an inverse FFT, how should I handle circular convolution? How can...

Instantaneous frequency direction of human speech

Started by kman 1 year ago7 replieslatest reply 1 year ago240 views
For SSB (Single Side Band) modulation I use Prosch’s [1] IIR all-pass filters as per below:For a single Cosine tone, with a frequency from the range above, the...

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