초록 ▼

Known are direct-sequence spread spectrum systems (1) such as CDMA mobile radio systems applying short pseudo-noise sequences for encoding and decoding of data. A DS-SS communication system is provided in which less pseudo-noise sequences are used while at the same time providing efficient locking a

Known are direct-sequence spread spectrum systems (1) such as CDMA mobile radio systems applying short pseudo-noise sequences for encoding and decoding of data. A DS-SS communication system is provided in which less pseudo-noise sequences are used while at the same time providing efficient locking at the receiver side. To this end, a majority of the channels (BCH, PCH, AGCH, TCH, ACCH) in a cell (Z1, Z2) of a mobile radio system (1) share one long pseudo-noise sequence (PNL). At reception side, in a mobile radio station (MS1, MS2) or the like, efficient calculation of current sequence phases for current received channels is achieved by applying vector-matrix calculations to a received sequence state (x.sub.i) and received sequence offset (ofset) that are transmitted by a base station (BS1, BS2). The vector-matrix calculations apply precalculated and stored sequence offset transformation matrices (A).

대표청구항 ▼

[ I claim:] [1.] A direct-sequence spread spectrum communication system comprising at least one primary radio station and a plurality of secondary radio stations, the primary radio station and the secondary radio stations being arranged for communication with each other via control channels and traf

[ I claim:] [1.] A direct-sequence spread spectrum communication system comprising at least one primary radio station and a plurality of secondary radio stations, the primary radio station and the secondary radio stations being arranged for communication with each other via control channels and traffic channels, characterized in that at least in a cell at least a majority of the channels share at least one long pseudo-noise sequence, generated by at least one linear feedback shift register, the channels being distinguishable within the at least one long pseudo-noise sequence, and in that for locking on a current channel using a long pseudo-noise sequence, a phase of the current channel within the long pseudo-noise sequence at receiver side is derived from state information about the linear feedback shift register transmitted via a control channel.