Novel decoding technique for the synchronous and quasi-synchronous multiple access adder channel

Abstract

A novel technique that allows efficient trellis decoding for the M-choose-T synchronous multiple access (MA) adder channel is investigated. Decoding in the M-choose-T system is performed in two operations, identifying the set of active users in the channel and decoding the received data according to which set of users are active. The results show that a sufficient performance improvement is achieved without the need for additional information regarding the active users. The application of the proposed technique to the quasi-synchronous MA adder channel is also analysed. The modified decoding procedure shows a further improvement when compared to the conventional hard decoding technique.