Data over GSM voice

Closed Posted Jun 1, 2009 Paid on delivery
Closed Paid on delivery

We need a system which can interract with a GSM mobile/modem and via audio channel to be able to send data (it's like a modem on a carrier).

The problem is that the GSM voice channel isn' a simple carrier - the audio is entered in a codec.

We need to transfer data with a bandwidth of 300-400 bytes/sec - actually the audio is at codec's input with resolution of 8000 frames/sec - 16 bit width.

The system we need must be on this voice carrier because in many countries the CSD line service isn't available (this service has a bandwidth of 9600bits/sec) - we need fewer BUT on the voice channel.

The GPRS also isn't a good solution for us because requires session establishing, the service isn;t so cheap in many countries/providers and especially at prepaired sim cards.

The final solution must be provided like a PC software which can send/receive data connected to a GSM phone/modem - 2 PC's and 2 phones which are involved in a voice call.

The connection with PC can be made through the soundcard or better via Bluetooth - on a SCO connection - like used in HFP profile.

Audio Services Electronics Engineering Matlab and Mathematica Wireless

Project ID: #444166

About the project

12 proposals Remote project Active Aug 1, 2009

12 freelancers are bidding on average $521 for this job

bbk

Hello, I can make your project. Best Regards, Alexandr.

$550 USD in 60 days
(18 Reviews)
5.1
engmatlab

Dear Sir, i am very interested with your project, i can do it based on MATLAB-GUI. i am study with master degree of wireless communication and work more than five years on MATLAB. i can finish at time, sinc More

$450 USD in 10 days
(5 Reviews)
3.1
yamukha

I can provide hardware solution at $250. And software solution at $400. The actual problem - echo and GSM voice chanel itself. It was developed using specific human characteristics in voice recognition (not for recog More

$250 USD in 70 days
(1 Review)
2.3
yusuf1234

i will provide it on time.

$250 USD in 1 day
(0 Reviews)
0.0
DigitalProdigy

The project is a logical communication systems problem. Please reply, i'll send a simple simulation model im Matlab and then can decide on the details of the project if the buyer is interested. Looking forward Thanks More

$600 USD in 10 days
(0 Reviews)
0.0
fwriter2

Sir, I can give you the working solution.. I have worked on the similar project and have made enough research including IEEE presentation on the topic. Besides, I can write another research project for you. For add More

$750 USD in 1 day
(0 Reviews)
0.0
usamacpp2

Please check PMB

$400 USD in 10 days
(0 Reviews)
0.0
WirelessXp

I can give you better solution, include software and hardware. And I've engaged in 2G/3G development 6 years. Look forward to your reply.

$500 USD in 30 days
(0 Reviews)
0.0
ybellavance

I am an electronics engineer specialising in Digital Signal Processing. I could probably make the codec myself. Im presently working on an audio engineering project.

$750 USD in 7 days
(0 Reviews)
0.0
mohitesr

i need more details about the project. i have worked on similar things previously. if you are opting for me, Kindly let me know.

$350 USD in 15 days
(0 Reviews)
0.0
reaz03

Please check my PMB

$750 USD in 15 days
(0 Reviews)
0.0
alchemistt

Number of days for completion can be less than 45 but will not more than that...

$300 USD in 45 days
(0 Reviews)
0.0