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c6400 2D FFT using dsplib   [9 Articles]

Can I do a 2D FFT using the TI dsp library fft routines (DSP_fft16x16t)? I can't find any examples for implementing this function even for the 1D case let alone the 2D case. It w...

FFT again, have a problem

Hi, c6x developers. I've founded the FFT function "cfftr2.asm". It contains both C and asm sourse, and asm is hand optimized. But TI's FFT operates by float ar...

optimum FFT size for C6711 cache system?   [3 Articles]

I was looking at the asm code on the TI website for the optimized FFT algorithms. Is there an optimum size for an FFT to best utilize the resouces on board the proc...

Real FFT/IFFT on C6711   [11 Articles]

Hi C6x, I have a project that requires a Real FFT/IFFT algorithm. I found several DSP libraries (DY4 and Kanegineering). But I hate to have to pay $5000 to $5500 ...

FFT algorithm

hi, i'm developing a jammer simulation model using C6201 fixed point processor. can anyone send me the FFT algorithm using C language. the inputs to the FF...

FFT function   [2 Articles]

Does anyone know where can I purchase a DSP library which has the function "autoscaling radix 4 FFT"?? Most of the site has only radix 4 FFT without autoscaling, so...

mixed radix FFT

suppose some one needed a 12 point fft. Does any one design the 12 point using a mixed radix fft or do most engineers use the published radix 4 and pad the sampled inpu...

2d fft

Hi all, I'm attempting to do a 2d fft on image data (8bit chars - just luma for now) using the c6711 (idk). In the dsplib TI has several 1d fft algorithms that re...

FFT algorithm   [2 Articles]

i\'m a final year student from malaysia. Currently i\'m developing a simulation based application on Jammer Technology using C6201 DSP from TI. Can anyone send ...

FFT Implementation on DSP   [5 Articles]

Hi, does anyone has any idea how much time will a 512 point FFT typically take on 6701...the one I am using is taking approx 15ms..for a 256 point FFT it takes...

FFT. for dsp 64xx   [2 Articles]

I have a 144 point sequence I need to take a fft of. The radix 4 decimation of frequency/time takes up to many cycles. I was thinking of breaking the alg...

How to split 2N-point real sequence after N-point complex FFT   [4 Articles]

Hi all, I'm using "cfftr2.asm" for 6711 routine to perform N-point complex FFT on 2N-point real sequence. It work's fine, I can perform FFT and IFFT (with "...

How to use TI's fft library???   [7 Articles]

Hi, Can anyone tell me how to use the DSP libraries from TI? I'm especially intrested in the fft functions. I tried the steps described in the SPRU657 gen...

fft on c6x problem?   [2 Articles]

In fft radix4 code that given by TI, No overflow protection or detection is performed!! Therefore, as the numpoints N are increased, inverse fft do not make co...

FFT ON C6X   [2 Articles]

We have ordered the evaluation card of Texas. We have not find the optimized FFT routine which results gave the results of the FFT benchmarks reprted by Texas. Wher...

Real FFT   [2 Articles]

Hi group, I am developing a real time algorithm on my C6711 DSK and I have to deal with FFT's. I am using TI's function DSPF_sp_cfftr2_dit and it is working righ...

Double word aligned

Hi, I'm working with FFt function like DSPF_sp_cfftr2_dit(x,w,N) x:signal w:twiddle factor N:size of the FFT ----------------------------------...

DC after fixed-point FFT

Hello. When I get a spectrum(by FFT function from C64 library)after digital down conversion on my board(ADC(Analog Devices), DDC (Graychip GC4016), C6416), I always see a DC com...

Fixed point FFT

There was some disscussion here about the dynamic range of fixed point FFT. The simplest way around it is to scale down the data before the conversion, but has anyb...

C6701 FFT&IFFT libraries   [2 Articles]

Hello everybody again, I have been working with the libraries that Texas instruments supplies for the 6701 but the FFT and IFFT don't work properly in assembly. Th...

6711 DSK FFT with RF3 HELP!!   [2 Articles]

Hi all We need to do some real-time processing trials using the DSK 6711. I have got the RF3 reference, and the benchmark FFT. I am having major problems getti...

1Hz FFT   [4 Articles]

My requirement is to in the end deliver FFT's at 1Hz resolution. I have a functional system using the TI radix-4 assembly FFT and TI C6701. My sample rate is 7.6MHz...

DSP_fft in 6416

Hi, I try to find fft of impulse sequnce. But my fft output is not correct when i compare with matlab. Actually, fft of impulse should be one in all frequeny. My bug code given ...

fft of IIR filter?????????????   [2 Articles]

Hi all, how can i plot the fft of IIR filter's impulse response in ccs. Any response in this regard would be helpful. Thanks wajahat ...

Question about the FFT on C6711   [3 Articles]

Question about the FFT on C6711 Hello everybody, I'm implementing a FFT on a TMS320C6711. The  code provided by TI (you can find it at ftp...

FFT-Radix2 implementation problem

I got source code of FFT (radix2) from site TI. I used 16 (or 32)-point FFT. When i set input values to (1 0 ; 1 0 ; ... 1 0), output values were (16 0 ; 0 0 ; .....

q:large size fft ?   [11 Articles]

hi all: i need to do lager size fft(more than 64K);cause the dsplib do not surport it,i made the code myself(time is not critical).And test it with sine wave(which is generated by...

fft processor   [5 Articles]

Hello, I'm looking for a processor that can perform a 1024-point FFT on a 50ms time window in real-time. I need guidance on how to go about selecting a processor that will do th...

4-bit FFT for C6711

Hallo everybody! Does anyone have a FFT-algorithm, that works for data with 4096 samples. We will use it on C6711. Hopefully with advantage of the radix4 algorith...

URGENT HELP REQUIRED REGARDING IMPLEMENTING FFT ALGO IN DSP KIT   [3 Articles]

hi can any one tell me how to implement fft algo on 6711. its urgent and plz tell me from scratch ...

question on cycles needed for FFT   [6 Articles]

Hello, For implementing 64point FFT on C6201 after optimization I found it takes around 900 cycles at minimum but I need it to become around 600 cycles. D...

FFT on C6711 DSK & audio daughter card   [2 Articles]

Dear all, I'm trying to implement an FFT on the C6711. I'm using the Audio daughter card TMDX326040A (PCM3003) to send data to the DSK and they are con...

[Fwd: Re: FFT on C6711 DSK & audio daughter card]

Nic- Ok great! Ever wonder why there's not a Debug 4301 EE class taught in school? -Jeff -------- Original Message -------- Subject: Re: [c6x] FFT o...

FFT in c6713   [4 Articles]

There's any way to make a real FFT in C6713. I was watching DSPF files, all this files provided by TI does it with Complex Numbers. Regards, -- ~# Guillem Hernandez Sola ~# ...

Understanding FFT and IFFT   [3 Articles]

Greetings, I would like to implement some MPEG/audio-like codec on C6711. Still I'm too newbie at the topix and I'd have some questions about (I)FFT. I've exam...

FFT in CCS

Hi, I need help to get the output in CCS using the example fftsinetable from Chassaing's book , I know that I can get the fft from CCS directly but I want to see the output...

buffer overflow

Hi I am trying to run my simulink code on dsp 6711 kit. I am calculating fft of input ( real time signal).When I use 128 point fft I can succesfully run my ...

FFT in practice   [3 Articles]

Hi. I would like to use an FFT algorithm on my 6711, e.g. radix2 or r4fft from the 62xDSP library. I assume this is a very common task. How should theses functio...

Re: q:large size fft ?   [3 Articles]

Diao Yi Ping > i need to do lager size fft(more than 64K);cause the dsplib do not > surport it,i made the code myself(time is not critical).And test it > with sine wave(whi...

A question about cfftr2_dit.asm   [2 Articles]

hi all: I have a question about cfftr2_dit. I download cfftr2_dit.asm from ftp.ti.com to compute FFT. According to it's description, there will need 20716 inst...