Single channel duplex communication system

Details Single channel duplex communication system Single channel duplex communication system

1983-12-07

1984-10-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 38, H04L 514

Patent

active

044803273

ABSTRACT:
A single channel duplex transmitter/receiver utilizing digital frequency shift keying (FSK) signals. An analogue-to-digital converter frequency modulates the output of a local oscillator whose output is coupled via a mixer/combiner/splitter network to an aerial. FSK signals received from the aerial in the receiver are mixed with the local oscillator output in network to provide quadrature signals which are low-pass filtered before being demodulated in a zero IF demodulator to give a digital output. To avoid unwanted sidetone the output of the A/D converter is fed through a delay to a digital network where it is subtracted from the corresponding signals fed back through the demodulator. The digital signals are then fed to a D/A converter.

REFERENCES:
patent: Re30111 (1979-10-01), Blood
patent: 3899637 (1975-08-01), Willard et al.
patent: 4237463 (1980-12-01), Bjor et al.
patent: 4238850 (1980-12-01), Vance
patent: 4271501 (1981-06-01), Vance et al.
patent: 4320498 (1982-03-01), Justice
patent: 4393494 (1983-07-01), Belforte et al.

Affiliated with

Also associated with

Rating

Single channel duplex communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Single channel duplex communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single channel duplex communication system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1104925