Apparatus and method for converting a frequency division multipl

Details Apparatus and method for converting a frequency division multipl Apparatus and method for converting a frequency division multipl

1991-12-02

1995-04-11

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 50, 359123, H04J 400, H04J 1400

Patent

active

054065534

ABSTRACT:
Apparatus for converting a frequency division multiplex (fdm) signal to a time domain multiplex (tdm) signal in which a voltage control oscillator whose output is a staircase of reference frequencies is mixed by a mixer with a received fdm signal. Each received frequency is output in turn at a common intermediate frequency from a bandpass filter thereby forming a tdm signal after passing through a demodulator and low pass filter. The conversion may take place in the optical domain by mixing optical reference frequencies with an optical fdm signal in, for example, a coherent heterodyne optical receiver.

REFERENCES:
patent: 4075429 (1978-02-01), Takahata et al.
patent: 4182935 (1980-01-01), Chocon
patent: 4237551 (1980-12-01), Narasimha
patent: 4510598 (1985-04-01), Gockler et al.
patent: 4726010 (1988-02-01), Ali et al.
patent: 4916705 (1990-04-01), Glance
Electronics Letters, vol. 22, No. 12, Jun. 5, 1986, "Crosstalk Due To Three-Wave Mixing Process, etc.", Shibata et al, pp. 675-677.

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