Data over GSM voice

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.

Taidot: Äänipalvelut, elektroniikka, tekniikka, Matlab ja Mathematica, Langaton

Näytä lisää: data gsm voice, data gsm, modem gsm voice, data voice gsm, gsm data voice, data voice, send data gsm, gsm voice channel, data gsm voice channel, gsm voice channel data, gsm voice data, data send gsm voice, send data voice call, data gsm phone voice, windows mobile send data gsm, data voice modem, data transfer gsm voice, voice over service, voice over or voice over, voice over for phone system

Tietoa työnantajasta:
( 0 arvostelua ) Bucharest, Romania

Projektin tunnus: #444166

12 freelanceria on tarjonnut keskimäärin %project_bid_stats_avg_sub_26% %project_currencyDetails_sign_sub_27% tähän työhön


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

$550 USD 60 päivässä
(18 arvostelua)

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 Lisää

$450 USD 10 päivässä
(5 arvostelua)

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 Lisää

$250 USD 70 päivässä
(1 arvostelu)

i will provide it on time.

$250 USD 1 päivässä
(0 arvostelua)

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 Lisää

$600 USD 10 päivässä
(0 arvostelua)

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 Lisää

$750 USD 1 päivässä
(0 arvostelua)

Please check PMB

$400 USD 10 päivässä
(0 arvostelua)

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 30 päivässä
(0 arvostelua)

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 7 päivässä
(0 arvostelua)

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 15 päivässä
(0 arvostelua)

Please check my PMB

$750 USD 15 päivässä
(0 arvostelua)

Hi, We are a software devlopement company Parikshalabs Pvt. Ltd Gurgaon (INDIA) [login to view URL] Our Mission is to establish a world-class software R&D service provider that leverages our deep competence in tec Lisää

$750 USD 120 päivässä
(0 arvostelua)

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

$300 USD 45 päivässä
(0 arvostelua)