CDMA communication system

Details CDMA communication system CDMA communication system

1997-08-27

2000-08-01

Cangialosi, Salvatore

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

370441, H04B 7216

Patent

active

060977159

ABSTRACT:
In a CDMA communication system, a base station includes a spreader 11 for spreading a frequency of a standby control signal by using a short code, a differential coder 12 for differential-coding the spread standby control signal and adders 13a and 13b for adding the differential-coded signal to an I channel signal and a Q channel signal, respectively, and a terminal station includes a differencial detector 14 for differencial-detecting a receiving signal and a matched filter 15 for inverse-spreading a differencial-detected baseband signal, wherein a complete intermittent operation of the terminal station in a standby state is realized and a power consumption of the terminal station is reduced by transmitting the standby control signal containing an information indicative of the terminal station and an intermittent interval from the base station to the terminal station.

REFERENCES:
patent: 5339330 (1994-08-01), Mallinckrodt
patent: 5809061 (1998-09-01), Shea et al.

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