Determine the original size of the FFT used in OFDM?

Started by SenSen 3 months ago4 replieslatest reply 3 months ago68 views
Given an unknown OFDM symbol consisting of 9144 samples, interested to know the size of the FFT used in the TX/Number of bins. Downsampling to 512,256,128,64,32...

Resolution vs Sampling Speed

Started by groger 4 months ago8 replieslatest reply 3 months ago113 views
Hello:I'm asking this as a bit of a newbie (do embedded prg as well) and did not take DSP at secondary level, and have some exposure to it. I know there's DSP functions...

Using stored channel for decoding data

Started by cogwsn 3 months ago1 replylatest reply 3 months ago49 views
Suppose I am operating in an environment where Tx and Rx are static and channel does not change between them. In this case if I have channel estimate between Tx...

Windowing before FFT on packets of IQ datastream

Started by wa1x 3 months ago7 replieslatest reply 3 months ago93 views
I am working on writing my own SDR software.  I have receiver hardware that delivers IQ data decimated down about ten khz coming in in packets of 480 complex samples...

MCU signal processing PDM to PCM

Started by Makodan 4 months ago11 replieslatest reply 3 months ago78 views
I would like to measure background noise - speech loudness in a room with a wireless sensor (with STM32F1 + wifi module). I bought a MEMS microphone (MP34DT01)....

OFDM Constellation.

Started by SenSen 4 months ago17 replieslatest reply 4 months ago122 views
Currently testing Blind Demodulation methods on recorded OFDM signal. The recordings were done with coax cables. While the estimated Frequency and Time shifts were...

Cyclic prefix concept in LTE

Started by Sharan123 2 years ago17 replieslatest reply 4 months ago428 views
I am trying to understand cyclic prefix concept that is used in LTE. Referring to the figure above, there are 3 copies of the symbol received by the receiver. So,...

Starting point for non-gaussian estimation

Started by sysizlayan 4 months ago4 replieslatest reply 4 months ago75 views
Hi,I am currently working on a device which uses a sensor whose noise characteristic is uniformly distributed. In detail, the sensor has quantization error. The...

Gaussian noise generation using non-pseudo random number generators

Started by nelsona 4 months ago7 replieslatest reply 4 months ago92 views
Hello,Is it possible to generate a digital noise signal with a Gaussian random distribution without using a pseudo random number generator?For instance, the following...
My question concerns on the accuracy of the localization system which relies on measuring the TDoA of the signal using 4 beacons spaced between 20 m (SBL for underwater...

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