METHOD AND SYSTEM FOR REDUCING INTERBEAM INTERFERENCE AND MULTIPATH FADING IN BENT-PIPE SATELLITE COMMUNICATIONS SYSTEMS

摘要

A method and system of forming and processing communication links in a satel litecommunications system. The satellite communications system includes a plurality of groups of transmitters, a satellite and a plurality of destination receivers . Each transmitter is associated with only one transmitter group and transmits a communications signal. Each respective communications signal is a CDMA signal having a predetermined cod e that is associated with a transmitter. Each respective predetermined code is selecte d from a code set assigned to the group of transmitters with which the transmitter is grou ped. Each code set is different from code sets associated with the transmitters of other se lected transmitter groups so that the code sets are arranged in a code set pattern that is repe ated for selected groups of transmitters. The satellite receives the communications signals an d groups together each received communications signal having a same predetermined cod e set. The code sets of selected uplink communications signals in a group of received communications signals are fully or partially despread, filtered, and respre ad so that the group of communications signals contains communications signals from only on e code set. Each group of communications signals is then transmitted to a different dest ination receiver,or groups on different code sets to the same destination receiver. /SDOAB