Spread spectrum base station notch filtering transmitted signals

• US 20020126647A1
• Filed: 02/28/2002
• Published: 09/12/2002
• Est. Priority Date: 05/15/1991
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Schilling, Donald L.
• Granted Patent: US 6,711,145 B2
• Time in Patent Office: Days
• US Class Current: 370/344
• CPC Class Codes: H04B 1/71 the interference being narrowband interference
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels

Abstract

A spread spectrum base station generates a plurality of spread spectrum signals. The spread spectrum signals encompass a selected frequency spectrum. Frequencies within the selected frequency spectrum having a high microwave power are detected. The spread spectrum signals are notch filtered at the detected frequencies. The notch filtered spread spectrum signals are transmitted.

Claims

1. A spread spectrum base station comprising:

means for generating a plurality of spread spectrum signals, the spread spectrum signals encompassing a selected frequency spectrum;

means for detecting frequencies within the selected frequency spectrum having a high microwave power;

means for notch filtering the spread spectrum signals so that a transmitted version of the spread spectrum signals is notch filtered at the detected frequencies; and

means for transmitting the notch filtered spread spectrum signals.

2. The base station of claim 1 wherein the notch filtering is performed at intermediate frequency.

3. The base station of claim 1 wherein the notch filtering is performed at radio frequency.

4. A spread spectrum base station comprising:

a plurality of mixers for mixing data signals with codes to generate a plurality of spread spectrum signals;

a sensor for detecting frequencies within a selected frequency spectrum having a high microwave power;

a plurality of notched filters for notch filtering the spread spectrum signals so that a transmitted version of the spread spectrum signals is notch filtered at the detected frequencies; and

an antenna for transmitting the notch filtered spread spectrum signals.

5. The base station of claim 4 wherein the notch filtering is performed at intermediate frequency.

6. The base station of claim 4 wherein the notch filtering is performed at radio frequency.