| 摘要 |
PROBLEM TO BE SOLVED: To provide a real-time multi-user detection (MUD) receiver. SOLUTION: A real-time multi-user detection (MUD) receiver processes simultaneous digitally modulated interferers and transmissions in the same frequency, optimizes performance for heavily loaded and overloaded multiple access systems, and uses tree-pruning, including confidence ordering, power-ordering, and a voting procedure. On the first iteration, user indices are ordered according to received powers. On subsequent iterations, the voting system provides soft decisions or confidence values utilized as soft inputs to single-user decoders. Voting is computationally attractive and allows the bank of decoders to operate on soft values, improving performance and reducing the number of turbo MUD iterations. The bank of soft output error correction decoders produces an improved set of soft decisions or confidence values corresponding to the channel bits transmitted by each interfering user. COPYRIGHT: (C)2009,JPO&INPIT
|
