Spread spectrum base station

• US 20050169350A1
• Filed: 03/28/2005
• Published: 08/04/2005
• Est. Priority Date: 11/16/1990
• Status: Abandoned Application

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Moore, Timothy F. III, Garodnick, Joseph, Schilling, Donald L., Lomp, Gary
• Application Number:
  US11/091,061
• Publication Number:
  US 20050169350A1
• Time in Patent Office: Days
• US Class Current: 375/142
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/7075 with code phase acquisition
• CPC Class Codes: H04W 52/221 using past power control commands
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/52 using AGC [Automatic Gain Control] circuits or amplifiers

Abstract

A spread spectrum base station comprises an automatic gain control (AGC) circuit having an input configured to receive a received spread spectrum signal and gain control the received spread spectrum signal to produce a gain controlled signal. A correlation circuit has an input configured to receive the gain controlled signal and correlate the gain controlled signal with a code to produce a despread signal. A power measurement and comparator circuit is configured to receive the despread signal and a control level of the AGC circuit. The circuit processes at least the despread signal and the control level to produce a processed signal and compares the processed signal with a threshold to produce a comparison signal. The comparison signal is used to produce a power command. A multiplexer multiplexes the power command with a signal for transmission over an antenna.

Claims

1. A spread spectrum base station comprising:

an automatic gain control (AGC) circuit having an input configured to receive a received spread spectrum signal and gain control the received spread spectrum signal to produce a gain controlled signal;

a correlation circuit having an input configured to receive the gain controlled signal and correlate the gain controlled signal with a code to produce a despread signal;

a power measurement and comparator circuit configured to receive the despread signal and a control level of the AGC circuit and processing at least the despread signal and the control level to produce a processed signal and comparing the processed signal with a threshold to produce a comparison signal, the comparison signal used to produce a power command; and

a multiplexer for multiplexing the power command with a signal for transmission over an antenna.

2. A method comprising:

receiving a spread spectrum signal;

gain controlling the received spread spectrum signal by an automatic gain control (AGC) circuit to produce a gain controlled signal;

correlating the gain controlled signal with a code to produce a despread signal;

processing at least the despread signal and a control level of the AGC circuit producing a processed signal;

comparing the processed signal with a threshold to produce a comparison signal;

producing a power command using the comparison signal; and

multiplexing the power command with a signal for transmission over an antenna.