SPREAD SPECTRUM COMMUNICATION SYSTEM
Assignee
MCDONNELL DOUGLAS CORPORATION A CORP. OF MARYLAND
Filed
Nov 18, 1991
Granted
Oct 14, 1997
Location
GARDEN GOVE CA US
Abstract
Digital information is convolved with a pseudorandom code and then transmitted at radio frequency in a spread spectrum signal to a receiver also containing the same pseudorandom code. Since the transmitted signal is below the noise floor for that bandwidth, it is virtually unjammable and undetectable without possession of the pseudorandom code. Successful extraction of the transmitted information depends upon precise matching of the transmitted frequency and the exact phase matching of the pseudorandom code at the receiver with the convolved pseudorandom code in the transmitted signal.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Apr 28, 1992
Rescinded
Dec 9, 1996
Duration
4 years, 7 months
Inventor
- 1MICHAEL A. RIZZO
Record Details
- Patent number
- US 5677928
- Application
- 07795165
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records