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

[nansai hu]

Ok. I add a vector sink in GRC and to observe the data in that module.

But when I run GRC there is no result shown. I need to add some other block to see or I need write some code like "prinf" in Python?

 

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

all blocks that have:

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

-josh

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
module?

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
already.
Now, I just want to use GRC to constuct a front end and connect to my own
block.

The interface bewteen these two is a power vector of FFT results and  I
use
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?

-josh

 So what is the format of that module and How clould I use it if my C++

block
have a float vector input(512 points power result of FFT).

Thanks



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