초록 ▼

A radiotelephone (10) capable of operation within a CDMA radiotelephone system. The radiotelephone includes a receiver (30) for receiving a paging channel transmission; a system time pseudonoise (PN) generator (18); and despreading circuitry (20, 22, 24 26, 28), having an input coupled to the receiv

A radiotelephone (10) capable of operation within a CDMA radiotelephone system. The radiotelephone includes a receiver (30) for receiving a paging channel transmission; a system time pseudonoise (PN) generator (18); and despreading circuitry (20, 22, 24 26, 28), having an input coupled to the receiver, for despreading the paging channel transmission received during at least a portion of the assigned slot. The assigned slot is predetermined to have a duration that is three times the duration of a rollover period of the system time pseudonoise (PN) generator (26.667 msec) and four times the duration of one frame (20 msec), or 80 msec. The use of predetermined masks for initializing the PN generators, and in particular a Long Code PN generator (32), is also described.

대표청구항 ▼

A direct sequence, spread spectrum Code Division Multiple Access (CDMA) radiotelephone system, comprising: a plurality of base stations each having a base station coverage area, each of said plurality of base stations transmitting a paging channel having a plurality of repeating paging channel slots

A direct sequence, spread spectrum Code Division Multiple Access (CDMA) radiotelephone system, comprising: a plurality of base stations each having a base station coverage area, each of said plurality of base stations transmitting a paging channel having a plurality of repeating paging channel slots each of which is comprised X frames, each of said plurality of base stations including means for assigning at least one paging channel slot to radiotelephones located within the coverage area of the base station; and individual ones of said radiotelephones comprising control means for operating said radiotelephone within the CDMA radiotelephone system, an individual one of said radiotelephones comprising, a receiver for receiving the paging channel transmission from at least one of said plurality of base stations; a system time pseudonoise (PN) generator means; a multi-finger correlator, having an input coupled to said receiver, for despreading a paging channel transmission received during at least a portion of an assigned paging channel slot, wherein the assigned paging channel slot is predetermined to have a duration that is Y times the duration of a rollover period of said system time pseudonoise (PN) generator; and means for periodically activating at least portions of said radiotelephone to receive and despread a paging channel transmission received during at least the portion of the assigned paging channel slot.