Title:
CDMA MODEM
Document Type and Number:
WIPO Patent Application WO1997002675
Kind Code:
A3
Abstract:
The invention provides a spread spectrum communication system for maintaining an initial transmit power level of a communication station during periods of inactivity. The system comprises a first station (501) and a second station (502), the initial transmit power level of which is maintained, wherein the first station generates an automatic power control signal by comparing a measured noise power level in a communication channel and an estimated system transmit power level and the second station occasionally transmits a spread spectrum signal whilst in an inactive state and receives the automatic power control signal to adjust an initial transmit power level thereof.
Inventors:
LOMP GARY
OZLUTURK FATIH
SILVERBERG AVI
OZLUTURK FATIH
SILVERBERG AVI
Application Number:
PCT/US1996/011059
Publication Date:
April 03, 1997
Filing Date:
June 27, 1996
Export Citation:
Assignee:
INTERDIGITAL TECH CORP (US)
International Classes:
G06F13/374; H03K3/84; H03H17/02; H04B1/707; H04B1/7075; H04B1/708; H04B1/7085; H04B1/709; H04B1/7093; H04B1/711; H04B7/005; H04B7/216; H04B7/26; H04B15/00; H04B17/00; H04J13/00; H04J13/10; H04K1/00; H04L1/00; H04L5/14; H04L7/00; H04L7/033; H04L25/02; H04L27/20; H04L27/233; H04L27/30; H04N1/333; H04W52/04; H04W52/14; H04W52/24; H03H17/06; H04B1/7077; H04B1/7115; H04B1/712; H04J11/00; H04J13/12; H04J13/16; H04L27/00; (IPC1-7): H04J13/04
Foreign References:
| US5416797A | 1995-05-16 | |||
| DE3743731A1 | 1989-07-13 | |||
| US5414729A | 1995-05-09 | |||
| US5347536A | 1994-09-13 | |||
| US5349606A | 1994-09-20 | |||
| EP0668662A1 | 1995-08-23 | |||
| US5519736A | 1996-05-21 |
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