Pulse or digital communications – Repeaters – Testing
Patent
1994-11-15
1996-07-23
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375216, 375302, 455 93, 455110, H04B 104, H04B 1707, H03C 300
Patent
active
055397700
ABSTRACT:
A spread spectrum modulating apparatus includes an oscillator outputting a carrier. A frequency multiplier multiplies a frequency of the carrier by a predetermined integer N1. A frequency divider divides the frequency of the carrier by a predetermined integer N2. A spread code generator uses an output signal of the frequency divider as a clock signal, and generates a spread code in response to the clock signal. A power supply feeds a dc bias voltage. An operation device executes a predetermined logic operation between the spread code and the dc bias voltage of the power supply. A switch selectively feeds an input information signal to either the oscillator or the point of connection of the power supply to the operation device, selecting between PSK and FSK as primary modulation. An output signal of the operation device and an output signal of the frequency multiplier are multiplied to execute a spectrum spreading process.
REFERENCES:
patent: 4686490 (1987-08-01), Cressey
patent: 5121407 (1992-06-01), Partyka et al.
patent: 5241562 (1993-08-01), Partyka et al.
Chin Stephen
Gluck Jeffrey W.
Victor Company of Japan Ltd.
LandOfFree
Spread spectrum modulating apparatus using either PSK or FSK pri does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spread spectrum modulating apparatus using either PSK or FSK pri, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread spectrum modulating apparatus using either PSK or FSK pri will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-719689