Radio broadcasting system based on ZigBee protocol

A technology of wireless broadcasting and wireless reception, applied in the field of wireless communication, can solve the problems of wireless signals cannot be directly received, cannot be applied at any time, and has limited coverage, and achieves the effects of low power consumption, easy implementation and low cost.

Inactive Publication Date: 2014-12-17
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The early broadcasting system used wired broadcasting, which required poles and wires, which was extremely costly, and the coverage was limited, and the signal distortion was also serious; but now the more popular wireless broadcasting system uses wireless AM or FM technology to realize voice signal The wireless transmission avoid

Method used

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  • Radio broadcasting system based on ZigBee protocol
  • Radio broadcasting system based on ZigBee protocol
  • Radio broadcasting system based on ZigBee protocol

Examples

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Embodiment Construction

[0027] 1 Overall block diagram:

[0028] The Zigbee wireless broadcasting system consists of a voice signal processing circuit 1, a PCM encoding and multiple clock generation circuit 2, a signal transmission circuit 3, a Zigbee wireless network 4, a first wireless receiving circuit 5-1, a second wireless receiving circuit 5-2, ..., the nth wireless receiving circuit 5-n, the first PCM decoding circuit 6-1, the second PCM decoding circuit 6-2, ..., the nth PCM decoding circuit 6-n, the first voice output circuit 7-1 , the second voice output circuit 7-2, ..., the nth voice output circuit 7-n, the overall design block diagram of the system is as follows figure 1 shown:

[0029] 2 wireless broadcast networks:

[0030] Zigbee Wireless Broadcast Network:

[0031] ZigBee is a low-power local area network protocol based on the IEEE802.15.4 standard. ZigBee technology is a short-range, low-power wireless communication technology. Compared with other wireless communication technolog...

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Abstract

The invention discloses a radio broadcasting system based on ZigBee protocol radio communication and PCM coding-decoding. According to the radio broadcasting system, a voice signal processing circuit (1), a PCM coding and multi-channel clock generation circuit (2) and a signal transmission circuit (3) are sequentially connected; the signal transmission circuit (3) is used for sending a signal to a ZigBee radio network (4), the signal is transmitted to a first radio reception circuit (5-1), a second radio reception circuit (5-2), ..., an nth radio reception circuit (5-n) through the ZigBee radio network (4) respectively, the first radio reception circuit, a first PCM decoding circuit and a first voice output circuit are sequentially connected, the second radio reception circuit, a second PCM decoding circuit and a second voice output circuit are sequentially connected, and the nth radio reception circuit, an nth PCM decoding circuit and an nth voice output circuit are sequentially connected. The radio broadcasting system is automatic in networking, capable of realizing encryption transmission, high-fidelity in radio signal transmission, simple and easy to operate in installation and maintenance, high in expansion capacity, low in cost, low in power consumption, and capable of working in a license-free frequency band of 2.4GHz.

Description

technical field [0001] The present invention is a wireless broadcasting system based on Zigbee protocol, which belongs to the technical field of wireless communication. Background technique [0002] Broadcasting system is a tool for disseminating public information, widely used in factories, campuses, stations, office buildings and other public places. The broadcast system can play background music and turn into an alarm broadcast in the event of an emergency. [0003] With the development of wireless communication technology, the research and application of wireless broadcasting technology are receiving more and more attention. The early broadcasting systems used cable broadcasting, which required poles and cables, which was extremely expensive, limited in coverage, and severely distorted the signal. Now the more popular wireless broadcasting systems use wireless AM or FM technology to realize the voice signal. It avoids the trouble of pole installation and has the advant...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04W84/18
CPCY02D30/70
Inventor 张胜陈铭永吴锦飞梅阳阳钱忆张晋倪晗悦侯小湄
Owner NANJING UNIV OF POSTS & TELECOMM
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