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Fibre radio atm network and services

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Reducing interference in mobile communications

An advanced receiver for joint data detection applicable to mobile communications is under development.

Digital Economy

Current mobile communication systems which use Code Division Multiple Access suffer from two limitations. The base-station receiver has banks of single-user demodulators that require complex power control arrangements along with special spreading sequences to cope with multiple-access interference. Joint demodulation should be a better solution. Computer simulation has shown that a receiver scheme based on joint data detection and interference cancellation promises to outperform conventional systems. The bit error rate is far lower and the system is robust to multiple-access interference. The scheme has been realised under laboratory conditions with two transmitters and a two-user base-station receiver. The number of users needs to be extended, but the fully developed system should be capable of implementation with current technology.

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