IP Library › Granted Patent US 7,394,845
Granted Patent B2
US 7,394,845 · App. 11/050,077 · Granted Jul 1, 2008

Method for interwoven spreading codes

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Quick Facts
Patent No.
US 7,394,845
App. No.
11/050,077
Granted
Jul 1, 2008
Kind
B2
Abstract

An interwoven spreading code is formed by a stretched spreading code series at a first frequency and a mirror of the stretched spreading code series at a second frequency. The interwoven spreading code can be used to spread a baseband signal. Data can be recovered through correlation of a received signal with the interwoven spreading code. The spreading code used in forming the interwoven spreading code can be a Barker code.

Claims (15)

1. A method of communication, comprising:

providing a spreading code A consisting of elements 1 . . . n;

obtaining a stretch code B, having an element i being an average of element (i-1) and element i of code A;

obtaining a code C by mirroring code B to thereby reverse positions of elements of B;

obtaining an interwoven code D by summing codes B and C; and

spreading data using the interwoven code to produce a signal transmitting the signal to a receiver.

2. The method of claim 1 wherein the interwoven spreading code is formed from code B at a first frequency and code C at a second frequency.

3. The method of claim 1 further comprising transmitting the signal.

4. The method of claim 1 further comprising receiving the signal.

5. The method of claim 4 further comprising detecting correlation peaks in the signal to extract the digital data.

6. A system for extracting digital data from a signal encoded by interwoven spreading codes, comprising:

a demodulator for providing a demodulated signal;

a correlator operatively connected to the demodulator and adapted for correlating an interwoven code to the demodulated signal;

wherein the interwoven code is obtained by providing a spreading code A consisting of elements 1 . . . n, obtaining a stretched code B having element i being an average of element (i-1) and element i of code A, obtaining a code C by mirroring code B to thereby reverse position of elements of B, and summing codes B and C to obtain the interwoven code.

7. The system of claim 6 wherein the spreading code is a Barker code.

Assignments (5)
RELEASE OF SECURITY INTEREST Recorded Jul 17, 2019
From: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
To: VISHAY DALE ELECTRONICS, INC.; DALE ELECTRONICS, INC.; VISHAY INTERTECHNOLOGY, INC.; SILICONIX INCORPORATED; VISHAY SPRAGUE, INC.; VISHAY TECHNO COMPONENTS, LLC; VISHAY EFI, INC.; VISHAY VITRAMON, INC.; SPRAGUE ELECTRIC COMPANY
Reel/Frame 049826/0312 →
SECURITY AGREEMENT Recorded Jan 21, 2011
From: VISHAY INTERTECHNOLOGY, INC.; VISHAY DALE ELECTRONICS, INC.; SILICONIX INCORPORATED; VISHAY SPRAGUE, INC.
To: JPMORGAN CHASE BANK, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 025675/0001 →
RELEASE OF SECURITY INTEREST Recorded Dec 14, 2010
From: COMERICA BANK, AS AGENT, A TEXAS BANKING ASSOCIATION (FORMERLY A MICHIGAN BANKING CORPORATION)
To: VISHAY SPRAGUE, INC., SUCCESSOR-IN-INTEREST TO VISHAY EFI, INC. AND VISHAY THIN FILM, LLC, A DELAWARE CORPORATION; VISHAY DALE ELECTRONICS, INC., A DELAWARE CORPORATION; VISHAY INTERTECHNOLOGY, INC., A DELAWARE CORPORATION; SILICONIX INCORPORATED, A DELAWARE CORPORATION; VISHAY MEASUREMENTS GROUP, INC., A DELAWARE CORPORATION; VISHAY GENERAL SEMICONDUCTOR, LLC, F/K/A GENERAL SEMICONDUCTOR, INC., A DELAWARE LIMITED LIABILITY COMPANY; VISHAY VITRAMON, INCORPORATED, A DELAWARE CORPORATION; YOSEMITE INVESTMENT, INC., AN INDIANA CORPORATION
Reel/Frame 025489/0184 →
SECURITY AGREEMENT Recorded Mar 2, 2010
From: VISHAY SPRAGUE, INC., SUCCESSOR IN INTEREST TO VISHAY EFI, INC. AND VISHAY THIN FILM, LLC; VISHAY DALE ELECTRONICS, INC.; VISHAY INTERTECHNOLOGY, INC.; SILICONIX INCORPORATED; VISHAY MEASUREMENTS GROUP, INC.
To: COMERICA BANK, AS AGENT
Reel/Frame 024006/0515 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 27, 2005
From: ALON, DANI; GAZIT, MEIR
To: VISHAY INTERTECHNOLOGY,INC.
Reel/Frame 015956/0394 →