| 摘要 |
A multiple-access digital radio communication network and method with communication uplinks between user terminal transmitters and central nodes that are connected with fixed communication links. User terminal transmitters are assigned to beam/node regions corresponding to an associated central node and their location within the central node antenna beam coverage area. User terminal transmitters assigned to one beam/node coverage region use multiple access channels that are mutually orthogonal for transmitting digital message information. These multiple access channels are reused in adjacent and other beam/node coverage regions. Error-correction coding (25), interleaving (26), and a modulator (29) are used in the user transmitter to increase resistance to potential interference from user terminal transmitters in other beam/node coverage regions. At a central node, an uplink receiver (21) provides digitized beam/node signals to a multiuser detector (23) and via the fixed communication links to multiuser detectors at adjacent central nodes. At the multiuser detector an adaptive processor (32) such as an equalizer or sequence estimator is used to combine beam/node signals from the present central node and adjacent central nodes to produce combined signals each associated with a particular user terminal transmitter. The combining in the adaptive processor reduces interference from user terminal transmitters associated with different beam/node coverage regions but with the same multiple access channel. Deinterleaving (34) and error-correction decoding (35) of the combined signal is used to complete the recovery of the digital message information.
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