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FFT ARM  

FFT ARM is project number 350050
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Status:

Selected Providers: fritz194

Budget: $250-750

Created: 11/28/2008 at 4:06 EST

Bid Count: 10

Average Bid:
$ 610

12/08/2008 at 4:06 EST

Project Creator: knarf
Employer Rating: (No Feedback Yet)

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Description

Given a base frequency of 50Hz, which will include 'normal' harmonics (e.g. 100, 200Hz), we need to detect an embedded 58 Hz frequency. The 58 Hz may be as much as 70dB below the base frequency.

We require a C function (standard C) to run on an ARM processor which will take a pointer to an array of ADC values (14 bit integers justified to 16 bits), perform an FFT of your choice and write the relative amplitudes (rms values) back into the array.

The whole project can be developed on a PC BUT bear in mind, no system calls to the OS (we'll need to port it), typical RAM constraint will be 32K and most importantly no floating point processing (!). Real time updating in the order of once every 0.5 sec, so plenty of processing time available (at 50 Mhz).

The same scenario will be needed for 60Hz, 120 Hz and 380 Hz.

In a nutshell we need a spectrum analyser from say 40-400Hz with a few particular frequencies of interest (58 Hz, 68 Hz etc).

Job Type

Messages Posted:5 View project clarification board Post message on project clarification board

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fritz194

 

750

4 days

11-28-2008 06:19 EST

10/1010/1010/1010/1010/1010/1010/1010/1010/1010/10
(1 reviews)

sounds easy

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pvccpr1965

 

750

15 days

11-28-2008 06:10 EST

(No Feedback Yet)

Pls. Chk PM

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vidhant

 

400

3 days

11-28-2008 23:14 EST

(No Feedback Yet)

The coding will be in C, along with the description

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softtcoder

 

700

30 days

11-28-2008 09:40 EST

(No Feedback Yet)

I am interested.

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meddev

 

750

60 days

11-28-2008 10:08 EST

(No Feedback Yet)

Hi, Expert c/c++ coding/design, willing to deliver what's required and more. Kind regards

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Gorthaur

 

400

10 days

11-28-2008 11:34 EST

(No Feedback Yet)

Hello, can do this job. Have physic\math education, 4 years C/C++ developing.Can implement FFT by fixed point calculations.Best regards, Denn

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FarooqAdiAndCo

 

750

10 days

11-28-2008 15:11 EST

(No Feedback Yet)

hi, I am an engineer did master in system on chip from lund university i think so i will get it done in 5 days so when to start

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vasika

 

500

7 days

12-03-2008 09:45 EST

(No Feedback Yet)

Hello, I have experience with fixed point math, and digital signal processing on a TI c64xx architecture. can do this in a week.

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mitsar

 

350

5 days

12-02-2008 09:23 EST

(No Feedback Yet)

I have 4 years of programming for embedded devices based on ARM processor using C. I also have expirience in low level code optimization. Ram constraints wll be fulfilled. Can do this job in in 5 days.

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tigerthinker

 

750

7 days

12-02-2008 09:45 EST

(No Feedback Yet)

Dear Sir: I am a senior research engineer with Phd degree. Frankly speaking, I do not have arm experience. However, I know many advanced algorithms of system identification and signal process. And this project can be done by only using very simple calculation + - * /. If I were chosen to do this project, the resulted C code can run at any platform for sure.

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