CDMA radiotelephone having optimized slotted mode and long code

Details CDMA radiotelephone having optimized slotted mode and long code CDMA radiotelephone having optimized slotted mode and long code

1994-01-05

1996-02-13

Cangialosi, Salvatore

Pulse or digital communications

Repeaters

Testing

375208, H04B 169

Patent

active

054917182

ABSTRACT:
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.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5212808 (1993-05-01), Su et al.
patent: 5237615 (1993-08-01), Snow
patent: 5247702 (1993-09-01), Su et al.
patent: 5258995 (1993-11-01), Su et al.
patent: 5267244 (1993-11-01), Messerschmitt et al.
TIA/EIA Interim Standard TIA/EIA/IS-95 Jul. 1993 pp. 6-71 to 6-75.
TR45.5.2/93.02.03.02 (Feb. 3, 1993) Status of TR45.5.2 Contributions as of Jan. 14, 1993.
TR45.5.2/93.01.13.10 (Jan. 13, 1993) Duty Cycle Power Consumption in Slotted Paging Mode, Adam Gould.
TR45.5.2/93.02.03.08 (Feb. 3, 1993) Text Modifications . . . , Adam Gould et al.
TR45.5.2/93.02.04.03 (Feb. 4, 1993) Text Modifications . . . , Adam Gould et al.

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