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Re: [Discuss-gnuradio] how to use Log Power FFT module in python

From: Josh Blum
Subject: Re: [Discuss-gnuradio] how to use Log Power FFT module in python
Date: Wed, 16 Dec 2009 16:18:52 -0800
User-agent: Thunderbird (X11/20090817)

all blocks that have:

1) a float input/sink port
2) a vector length set to fft_size


nansai hu wrote:
My question is I can't find any module in GRC can be conncet to Log Power
FFT module in right format.
Could you tell me which module in GRC can be use to receive Log Power FFT

2009/12/16 Josh Blum <address@hidden>

nansai hu wrote:

I want to do some function in frequency domain and just writen a C++ block
Now, I just want to use GRC to constuct a front end and connect to my own

The interface bewteen these two is a power vector of FFT results and  I
a Log Power FFT module in GRC.

My question is Log Power FFT module in GRC seems that have a very strange
output format(not stream or vector),

It outputs stream, where each element in the stream is a vector of floats
with length fft_size.

the output signature of the block is fft_size*sizeof(float)

specifically, what problem are you having?


 So what is the format of that module and How clould I use it if my C++
have a float vector input(512 points power result of FFT).



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