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Simple structure mm wave demodulation method and system of radio-on-fibre communication

A technology of a wireless communication system and a demodulation method, which is applied in the field of hybrid optical fiber-wireless communication communication systems, can solve the problems of increasing the cost of base stations, increasing the cost of mobile terminals, etc., and achieve the effect of cost saving and cost reduction

Inactive Publication Date: 2007-07-18
HUNAN UNIV
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Problems solved by technology

This increases the cost of the mobile terminal
In addition, in the uplink, the millimeter wave received from the mobile terminal must also be demodulated, and then modulated onto the optical carrier through the optical modulator, so the demodulation of the millimeter wave in the uplink must also use a The local oscillator signal source of the same frequency as the received millimeter wave also increases the cost of the base station

Method used

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  • Simple structure mm wave demodulation method and system of radio-on-fibre communication
  • Simple structure mm wave demodulation method and system of radio-on-fibre communication

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Embodiment Construction

[0054] The present invention will be described in detail below in conjunction with specific experimental examples and accompanying drawings.

[0055] As shown in Fig. 1, it is an existing millimeter wave demodulation scheme. It includes: an antenna 1 for receiving millimeter wave wireless signals, a local oscillator millimeter wave source 2 for generating millimeter waves with the same frequency as the radio millimeter waves received by the antenna, and a mixer 3 for combining the local oscillator millimeter waves with the The wireless millimeter wave signal received by the antenna is mixed, and the baseband data signal is demodulated. The low-pass filter 4 is used for filtering the baseband data signal.

[0056] As shown in Figure 2, the millimeter-wave demodulation scheme and the millimeter-wave receiver of the present invention include an antenna 111 for receiving radio millimeter-wave signals, and a power splitter 6 for dividing the received millimeter-wave signals into t...

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Abstract

This invention discloses a simple millimeter demodulation plan and a system in ROF communication system, which divides the millimeter signals of the up link sent by a user mobile terminal and received by the antenna into two parts, one part delays less than a data bit period, the other does not generate time delay, signals of the two parts are mixed to demodulate millimeter data, which can be used in total duplex fiber radio communication system and receiving millimeter waves by user mobile terminals.

Description

(1) Technical field [0001] The invention belongs to the technical field of hybrid optical fiber-wireless communication (Radio-over-Fiber, abbreviated as ROF) communication system. (2) Background technology [0002] The communication frequency adopted by the next-generation ultra-wideband wireless communication technology will extend to the millimeter wave band. However, there are two important factors that limit the development of millimeter-wave communication. One is that the transmission loss of millimeter-wave signals in the air is too large, so the transmission distance is too short. The other factor is that millimeter-wave communication devices are too expensive, which is not conducive to personal communication. communication. A fiber-over-fiber communication system (Radio-Over-Fiber, ROF for short) can solve the above problems. The ROF system includes a central station (Central Station, abbreviated as CS), an optical fiber link and a base station. The central statio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B14/02H04B10/12H04B7/00H04B10/2575H04B10/60
Inventor 余建军陈林
Owner HUNAN UNIV
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