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Bidirectional common frequency and broadcasting system for wireless same-frequency link mode

A wireless link, wireless frequency technology, applied in the field of broadcast communication, to achieve the effect of great flexibility and saving investment

Inactive Publication Date: 2007-10-24
广州银晃通讯设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The purpose of the present invention is to provide a two-way co-frequency and co-broadcasting system for wireless links. The self-developed co-frequency wireless link solves the technical problem that a large number of link frequencies must be networked

Method used

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  • Bidirectional common frequency and broadcasting system for wireless same-frequency link mode
  • Bidirectional common frequency and broadcasting system for wireless same-frequency link mode
  • Bidirectional common frequency and broadcasting system for wireless same-frequency link mode

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Embodiment Construction

[0030] Referring to the accompanying drawings, specific embodiments of the present invention will be described in detail.

[0031] The following is an analysis of the structure and working principle of foreign co-channel and co-broadcasting systems learned from relevant materials.

[0032] Figure 1 is a simulcast system composed of wired links. The system mainly includes simulcast base station, signal selection device, wired link and other parts.

[0033] Each simulcast base station is equipped with an ultra-stable crystal, and the ultra-stable crystal is used to provide a reference to lock the radio frequency of the simulcast base station, so that the frequency error between each simulcast base station is controlled within the specified range, so as to avoid the occurrence of simulcast junction areas beat interference phenomenon.

[0034] The signal selector is used to select the best signal from multiple signal receiving sources and perform the switching and forwarding pro...

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Abstract

The wireless same-frequency same-broadcast system comprises: only one wireless frequency as the link frequency for signal connecting with BS, and another wireless frequency as the BS working frequency for completing signal coverage. This invention applies both GPS lock frequency and signal decision technology, uses the GPS clock instead of ultra-stable crystal as the frequency reference, ensures dialogue quality and accuracy, and free to configuration scale and application.

Description

technical field [0001] The invention relates to a wireless communication technology, in particular to a broadcast communication method for expanding the coverage of a two-way wireless communication system (wireless intercom). Background technique [0002] Wireless intercom system (FM modulation mode) is widely used in public security, transportation and other departments. A conventional wireless intercom system generally consists of a repeater and a user terminal. The repeater is set at a higher position, and the coverage of the wireless communication network is increased through the receiving and forwarding of the repeater. [0003] With the rapid development of social economy and the expansion of urban areas, the requirements for departmental jurisdiction and communication range have also expanded. However, the noise in today's wireless communication environment is deteriorating day by day, and the coverage of repeaters is shrinking continuously. Two factors make it dif...

Claims

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Application Information

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IPC IPC(8): H04B7/26H04B1/54H04Q5/24H04M1/725
Inventor 陈开元
Owner 广州银晃通讯设备有限公司
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