Spread spectrum communication device

Details Spread spectrum communication device Spread spectrum communication device

1992-07-17

1994-01-11

Barron, Jr., Gilberto

Pulse or digital communications

Repeaters

Testing

H04L 2730

Patent

active

052788644

ABSTRACT:
A spread spectrum communication device according to the present invention includes a transmitter and a receiver, and suppresses demodulation errors to a minimum value, even if there exit a plurality of narrow band disturbing signals. In the transmitter, a first PN (pseudo noise) code from a fist PN code generator and a second PN code having a delayed phase coming from a shift register are inputted to a multiplexer and switched according to an exclusive logic sum of data and a disturbing signal. The multiplexer output is modulated by a modulator so that it can be transmitted. In the receiver, a correlation output from a correlator is detected by a detector and a detection output thereof is digitalized by a voltage comparator. A correlation pulse thus obtained is applied to two AND gates. Two time window pulses are each applied to two multiplexers nd are switched by a control signal, the outputs of the multiplexers being respectively applied to these AND gates. Pulses from these AND gates are counted by an up-counter and a down-counter in a demodulating circuit to demodulate the data.

REFERENCES:
patent: 5048052 (1991-09-01), Hamatsu et al.
patent: 5105436 (1992-04-01), Mori et al.
patent: 5115448 (1992-05-01), Mori
patent: 5132986 (1992-07-01), Endo et al.
patent: 5144641 (1992-09-01), Akazawa et al.
patent: 5195105 (1993-03-01), Hashimoto et al.

Affiliated with

Also associated with

Rating

Spread spectrum communication device 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 communication device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spread spectrum communication device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1636575