Frequency conversion method and base station in radio optical fusion communication system

Frequency conversion method and base station in radio optical fusion communication system

  • CN 1,934,806 A
  • Filed: 02/21/2005
  • Published: 03/21/2007
  • Est. Priority Date: 02/26/2004
  • Status: Active Application
First Claim
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1. , a kind of method that is used for changing frequency at the radio optical fusion communication system that comprises a base station and a long-range antenna station, wherein said base station generates a modulated radio signals, with the signal electric light that generates convert a light signal to and preserve modulating mode simultaneously, and via the signal of a fiber path to long-range antenna station transmission conversion, the light signal that the conversion of long-range photoelectricity ground, antenna station receives with extract modulated radio signals and via antenna by this signal of wireless radio transmission, described base station comprises that one first light source and a secondary light source are to generate the light signal of different frequency, an intermediate-freuqncy signal generating apparatus that is used to generate the modulation signal of midband, a modulator, it uses intermediate-freuqncy signal will be modulated into a Single Side Band With Carrier (SSB) or double-side band (DSB) modulated optical signal that does not suppress from the light signal of first light source, and optical mixer unit, it is used for modulated optical signal is mixed to obtain an optical transmission signal mutually with light signal from secondary light source, this method comprises the steps:

  • to control from least one frequency in the light signal of first and second light sources, so that the difference on the frequency between described light signal is the required frequency of described modulated radio signals, thereby switching is by the channel of the modulated radio signals of long-range antenna station extraction.

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