Sub-symbol parallel interference cancellation

H - Electricity – 04 – B

Patent

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H04B 1/10 (2006.01) H04B 1/12 (2006.01) H04B 1/707 (2006.01) H04B 7/216 (2006.01) H04B 15/00 (2006.01)

Patent

CA 2514455

Reduction of multiple access interference, in one example for asynchronous CDMA systems using long codes. In one aspect, parallel interference cancellation (PIC) implements a decoupled estimate, preferably non-linear and applied at chip intervals. According to another aspect, interference is cancelled using a technique that estimates bits for a symbol by interpolating signature waveforms for users to a common sampling lattice of the received data. According to another aspect, multi-stage, hybrid multi-stage, and reconfigurable recursive multi-stage multi-user detection architectures and corresponding processes are provided.

L'invention concerne la réduction de l'interférence d'accès multiple, dans un exemple de systèmes asynchrones AMRC utilisant des codes longs. Dans un aspect, l'élimination d'interférence parallèle (PIC) applique une estimation découplée, de préférence non linéaire et appliquée à des intervalles de puces. Selon un autre aspect, l'interférence est éliminée à l'aide d'une technique qui estime des bits pour un symbole en interpolant des formes d'onde de signature pour des utilisateurs dans un réseau d'échantillonnage commun des données reçues. Selon un autre aspect, l'invention concerne des architectures de détection multi-étage, multi-étage hybrides et multi-utilisateur ou multi-étage, récursives et reconfigurables ainsi que des procédés correspondants.

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