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Single-side-band-multiplex-signal-radio-relay

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Single side band multiplex signal radio relay

Details

Inventors: Shiki, Haruo;
Assignee: Nippon Electric Co., Ltd. (Tokyo, JP)
Primary Examiner: Griffin; Robert L.
Assistant Examiner: Ng; Jin F.
Attorney, Agent or Firm: Sughrue, Rothwell, Mion, Zinn and Macpeak

A radio relay for transmitting single side band (SSB) multiplex signals is disclosed. The receiving (or transmitting) frequencies on the up link and the down link at a repeater station are made different from each other for the purpose of reducing interference crosstalk between the transmission signals. More particularly, a shift frequency corresponding to the difference between the receiving frequency and the transmitting frequency on the up link or the down link at a repeater station A is selected in sequence from any one of the reference shift frequency fc and a plurality of shift frequencies deviated from the reference shift frequency according to the relation fc + n.sub.i x .DELTA.f, where n.sub.i is a positive or negative integers and .DELTA.f is a radix deviation frequency.

DETAILED DESCRIPTION It is one object of the present invention to provide a radio relay that is free from the aforementioned disadvantages caused by an SSB multiplex signal radio relay system employing a dispersal method.
According to one feature of the present invention, there is provided a single side band multiplex signal radio relay characterized in that a shift frequency corresponding to the difference between the receiving frequency and the transmitting frequency on the up link or the down link at a repeater station and is selected in sequence from any one of the reference shift frequency fc and a plurality of shift frequencies deviated from the reference shift frequency according to the relation fc + n.
sub.
i x .
DELTA.
f where n.
sub.
i is a positive or negative integer and .
DELTA.
f is a radix deviation frequency, whereby the receiving (or transmitting) frequencies on the up link and the down link at the repeater station are made different from each other.

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