real-time digital acoustic communication system using CDMA full report
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11-04-2010, 02:07 PM

A CDMA (Code Division Multiple Access) based communication system allows the users to share an available frequency spectrum. The users are allocated different codes that are recognizable for the preferred receivers. This solution has several advantages, among other it gives increased robustness to interference. The CDMA project and implimentation will investigate the benefits and losses of using CDMA communication system on an acoustic channel between two computers. The focus of the project and implimentation will be to study how a higher data rate will affect the robustness to interference. During the project and implimentation course 1999 a project and implimentation named Interference Rejection in an Acoustic Communication System, developed a communication system on an acoustic channel. Year 2000 a project and implimentation named Acoustic Communication system with two-branch diversity took place. These two project and implimentations have influenced the objectives of the CDMA project and implimentation and they are the most important frames of reference.

Presented By:
Björn Beckius
Jonas Granlund
Krister Estmer
Sofia Ladjemi
Stefan Einerman
Ulf Bragnell

The goal of this project and implimentation is to implement a real-time digital acoustic communication system using CDMA. The system should work reliably in a multi-path environment. The system should allow different coding gain to illustrate the trade-off between data rate and robustness to narrow band signal interference. The transmitted data will be pictures and text. The results from the two earlier project and implimentations are described further under System Overview (5.3). The result that the CDMA project and implimentation should achieve is lower error probability with the same bit data rate as The project and implimentation will be finished 2000-05-31 with demonstration and oral presentation. In addition, the final report and documentation will be available at this time. The group is determined to follow the time plan of the project and implimentation.

read full report and implimentationplan.pdf
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