METHOD FOR JAM-RESISTANT COMMUNICATION TRANSMISSION
Assignee
SIEMENS AKTIENGESELLSCHAFT
Filed
Jun 8, 1981
Granted
Jun 27, 1989
Location
UNTERHACHING DE
Abstract
A method for jam-resistant transmission speech signals by radio which have been processed via vocoders, utilizing spread spectrum multiple access modulation (SSMA) or rapid frequency hopping (FH) provides, with respect to the danger of an inherent jamming brought about when a great number of stations simultaneously use the same frequency band for the same radio channel frequency group, activation and deactivation of the transmitter and receiver at the rate of the internal system frame clock pulse during a frame clock pulse period only when useful information is present. In this manner, in the case of simplexcommunication connections, on the average approximately 40% and, in the case of duplex operation, more than 60%, of the transmitting time can be saved, and hence, the inherent jamming of the system can be reduced in a corresponding fashion.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 27, 1983
Rescinded
Apr 20, 1987
Duration
4 years, 2 months
Inventor
- 1JOSEF BRUSCH
Record Details
- Patent number
- US 4843612
- Application
- 06274142
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records