WO2018068428A1 - 一种工作在ism频段的无线数字跳频对讲机 - Google Patents

一种工作在ism频段的无线数字跳频对讲机 Download PDF

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Publication number
WO2018068428A1
WO2018068428A1 PCT/CN2017/000403 CN2017000403W WO2018068428A1 WO 2018068428 A1 WO2018068428 A1 WO 2018068428A1 CN 2017000403 W CN2017000403 W CN 2017000403W WO 2018068428 A1 WO2018068428 A1 WO 2018068428A1
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hopping
frequency
frequency hopping
wireless digital
digital frequency
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PCT/CN2017/000403
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English (en)
French (fr)
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余潇
余久恒
许曾
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余潇
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Publication of WO2018068428A1 publication Critical patent/WO2018068428A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping

Definitions

  • the invention relates to a wireless digital frequency hopping walkie-talkie working in the ISM band.
  • the biggest difference between the present invention and the fixed frequency wireless digital telephone is that the wireless digital frequency hopping technology is adopted.
  • the fixed-frequency wireless digital frequency hopping communication device is often a one-to-one point-to-point communication mode, and does not have the function of broadcasting information for all users of the entire network.
  • the wireless digital frequency hopping walkie-talkie working in the ISM frequency band under the management of the synchronous "frequency hopping pattern", can allow the same network device to simultaneously listen to the same time as the ordinary wireless walkie-talkie, and can separately communicate with each other.
  • frequency hopping communication can be performed in a wide frequency band, which can effectively avoid and eliminate multipath fading, co-channel interference, adjacent frequency interference, improve radio frequency resource utilization, and enhance intranet.
  • the invention belongs to the field of public communication.
  • the wireless walkie-talkie is a wireless communication tool based on voice transmission.
  • the way of transmitting electromagnetic wave information is roughly divided into analog mode and digital mode.
  • the wireless walkie-talkie that transmits the analog signal has the characteristics of low production cost, mature technical means, easy networking and simple and convenient use. However, it is also easy to be monitored or interfered with by similar technical equipment.
  • the digital wireless walkie-talkie is built on the technical equipment of the embedded computer processing platform.
  • the security function and multi-function of the information are unmatched by the analog wireless communication equipment.
  • the communication information is digitized and compressed, and the data can be encrypted by an algorithm. Even if the data is intercepted by the same technical equipment, it is technically difficult to increase the eavesdropping or stealing the information content because the network encryption algorithm is not mastered.
  • both technical equipments have a common feature, that is, the composed communication network must be completed on a fixed frequency channel, and the channel quality is susceptible to multipath fading, co-channel interference and adjacent frequency interference, and the quality of network communication is inevitable. Will be affected, the content of the communication is more vulnerable to attack, interference or stealing.
  • wireless communication representative product we are exposed to, such as mobile communication tools (mobile phones such as GSM, CDMA, etc.) and Bluetooth short-range communication technology.
  • mobile communication tools mobile phones such as GSM, CDMA, etc.
  • Bluetooth short-range communication technology In order to solve the electromagnetic interference, the reliability of the received data and the confidentiality of the information, they all adopt the frequency hopping technology, but they only adopt the one-to-one (pairing mode or point-to-point mode) communication mode.
  • the process of frequency hopping communication is more concealed and more difficult to intercept.
  • the other party is not aware of the law of carrier frequency hopping, it is difficult to intercept the communication content even with similar technical equipment.
  • the frequency hopping communication also has good anti-interference ability, and even if some frequency points are interfered, normal communication can still be performed at other uninterrupted frequency points.
  • the invention relates to a wireless digital frequency hopping walkie-talkie with simple networking, communication confidentiality and elimination of multipath fading, co-channel interference and adjacent frequency interference, which is also a common subject of the industry elite.
  • the object of the present invention is to provide a wireless digital frequency hopping walkie-talkie working in the ISM frequency band, and the same type of intercom equipment in the networking, under the control of the same pseudo-random frequency hopping parameter, synchronous frequency hopping communication at different frequency points.
  • everyone can listen to the Internet at the same time, and can also perform mutual voice or data communication to any user in the network and a new wireless digital frequency hopping intercom for convenient networking.
  • Wireless digital frequency hopping walkie-talkies operating in the ISM band have more functions than general-purpose wireless digital walkie-talkies (hereinafter referred to as wireless digital frequency hopping walkie-talkies):
  • the working frequency is randomly changed according to the pseudo-random sequence parameters.
  • the equipment in the network synchronizes the frequency hopping according to the “frequency hopping pattern”. As long as the “frequency hopping pattern” of the network is not mastered, the communication content and data will not be Stealed and monitored by similar technical equipment outside the network.
  • the voice signal is converted into a digital signal by the vocoder.
  • the encryption processing of the rolling key of the network is added, and the security level of the information of the network can be increased.
  • the networking mode is the master and slave mode. That is to say, the frequency hopping pointer, synchronization parameters, call rolling encryption key and management data are generated and sent by the host.
  • the slaves listen online and speak online. Control management. When the slave talks online, the frequency hopping synchronization information can be transmitted on behalf of the host.
  • Both the master and the slave can send and listen to the information in the network in the form of broadcast.
  • the system has the function of restricting an extension in the network to broadcast or exchange information with other users in the network through the host.
  • the host can specify that a slave is upgraded to a host, and the former host exits management.
  • the wireless digital frequency hopping walkie-talkie working in the ISM band of the present invention is provided with an alarm key. After the slave presses the alarm key, the device will no longer listen to or receive information and calls within the network. The slave exits the alarm mode and can only be confirmed and released by the host. The host presses the alarm button to automatically exit the host location and automatically upgrades from the specified slave to the host instead of its management function.
  • the host can directly control the slave to exit the network, and the device that is prohibited from exiting the network receives the communication data and the call within the network.
  • the host can open the PTT button of any slave to monitor the ambient background sound of the controlled slave.
  • the wireless digital frequency hopping walkie-talkie working in the ISM band of the present invention is specially provided with an extension knob, which is mainly used for quickly finding the called extension or selecting to send voice or information by broadcasting.
  • Figure 1 is a block diagram of a wireless digital frequency hopping walkie-talkie operating in the ISM band.
  • composition of a wireless digital frequency hopping walkie-talkie structure working in the ISM band in FIG. 1 is (hereinafter referred to as a wireless digital frequency hopping walkie-talkie):
  • wireless digital frequency hopping walkie-talkie wireless digital frequency hopping walkie-talkie
  • Wireless digital frequency hopping walkie-talkie case It is the base and casing for accommodating and installing all kinds of wireless digital frequency hopping walkie-talkie; 2. Antenna of wireless digital frequency hopping walkie-talkie: It is used to transmit and receive radio signals.
  • Power amplifier connected to the antenna, the main function is to amplify the voice or data signal transmitted by the ISM band wireless transceiver and radiate the output through the antenna; 4.
  • the ISM band wireless transceiver the wireless transceiver receives The frequency-hopping frequency of the transmission mode and the ISM frequency band is controlled by the MCU control management chip, and mainly processes the signal received by the antenna, and the amplified data stream is transmitted to the MCU control management chip for processing; 5.
  • the MCU control management chip when When the machine is confirmed as the host, the pseudo-random sequence code of the frequency hopping will be generated, and the frequency hopping control of the ISM band wireless transceiver of the network is completed according to the sequence code; and the frequency hopping pointer is sent to the slave; the vocoder is transmitted by the vocoder. Digital signal and pass The ISM band wireless transceiver transmits; displays the corresponding network information and data on the liquid crystal display, and indicates the current working state of the machine through the LED light tube; 6.
  • the vocoder digitally converts and compresses the voice signal transmitted by the MIC microphone And transmitted to the MCU control management chip transmission, at the same time, the MCU control management chip, the compressed digital voice signal received from the ISM band wireless transceiver is restored to the voice analog signal by decompression processing, and then passed through the SPK speaker.
  • Function setting button, alarm button, number button and PTT button function setting button and number button, is a wireless digital frequency hopping walkie-talkie controlled by the MCU control management chip through the keyboard, and performs function setting and Select the sending data phrase and the selection information to send the object, the PTT button is used to send the message. Or the button of the data information, the alarm key is a button used to protect the network from attack; 9.
  • Key input interface, serial communication interface The key input interface is used to input the network-related frequency hopping parameters and the rolling encryption algorithm.
  • the input interface, the input data is stored in the MCU control management chip E2PROM.
  • the serial communication interface is a data channel for downloading data and connecting to other networks for the background; 10.
  • MIC input interface, headphone output interface, PTT input interface a universal interface for connecting an external earphone, a microphone group or a Bluetooth walkie-talkie adapter; , power management circuit: connect the battery of the wireless walkie-talkie, manage the battery charging process and provide power for the wireless digital frequency hopping walkie-talkie electrical circuit; 12, battery: provide energy for the wireless digital frequency hopping walkie-talkie; 13, battery charging interface : Connect the battery of the wireless digital frequency hopping walkie-talkie to charge the battery and provide power protection during charging; 14. Power switch, volume knob: used to turn off or turn on the power of the wireless digital frequency hopping walkie-talkie and adjust the volume of the speaker output; 15.
  • the MIC microphone is an airborne microphone on a wireless digital frequency hopping walkie-talkie for inputting a voice signal to be transmitted.
  • SPK speaker an airborne speaker on a wireless digital frequency hopping walkie-talkie for outputting a received voice signal.
  • extension knob mainly used to quickly find the called extension or choose to broadcast Send a voice or message.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明涉及的一种工作在ISM频段的无线数字跳频对讲机，采用了数字跳频技术，其工作频率按伪随机序列参数随机改变，可以有效避开和消除多径衰落、同频干扰、邻频干扰，提高无线频率资源利用率，网内设备按照"跳频图案"同步跳频工作，只要不掌握本网"跳频图案"，通信内容和数据就不会被网外同类技术设备所窃取和监听。与固定频通信相比，跳频通信的过程比较隐蔽也难以被截获。只要对方不清楚载频跳变的规律，即使是同类技术装备也很难截获通信内容。同时，跳频通信也具有良好的抗干扰能力，即使有部分频点被干扰，仍能在其他未被干扰的频点上仍进行正常的通信。本发明涉及的一种工作在ISM频段的无线数字跳频对讲机，主要由：1、无线数字跳频对讲机机壳；2、无线对讲机天线；3、功率放大器；4、ISM频段无线收发器；5、MCU控制管理芯片；6、声码器；7、液晶显示屏及LED发光管工作状态指示灯；8、功能设置键、告警键、数字键和PTT键；9、密钥输入接口、串行通信接口；10、MIC输入接口、耳机输出接口、PTT输入接口；11、电源管理电路；12、电池；13、电池充电接口；14、电源开关、音量旋钮；15、MIC麦克；16、SPK扬声器；17、分机旋钮等组成。其组网方式是主、从方式，跳频的指针、同步参数、通话滚动加密解密密钥和管理数据，均由主机产生并发送，从机在线听和在线讲，均受主机控制管理。从机在线讲话时，可代主机传送跳频同步信息，同网技术设备，均具有广播式发送与接听功能。本发明涉及的一种工作在ISM频段的无线数字跳频对讲机特别设有分机旋钮，主要用来快速寻找被呼叫的分机或选择以广播方式发送语音或信息。

Description

一种工作在ISM频段的无线数字跳频对讲机
说明书
技术领域：
本发明涉及一种工作在ISM频段的无线数字跳频对讲机。本发明与采用固定频率无线数字讲机最大的区别在于，采用的是无线数字跳频技术。而固定频率无线数字跳频通信装置，往往都是一对一的点对点通信模式，不具备对全网所有用户进行广播式信息交流功能。本发明的工作在ISM频段的无线数字跳频对讲机，在同步“跳频图案”的管理下，能与普通无线对讲机一样，允许同网设备在线同时收听，又能分别相互单独对讲通信。在复杂的电磁环境中，能在在很宽的频带范围内进行跳频方式通信，可以有效避开和消除多径衰落、同频干扰、邻频干扰，提高无线频率资源利用率，增强网内通话和数据的保密性，并可远距离对网内的对讲设备进行控制管理的。本发明属公共通信领域。
背景技术：
随着科技的发展和社会的需求，为了方便人们在生活中相互间的沟通、交流和互动，智能手机、平板电脑、个人可穿戴设备、智能家居系统等各种网络设备的推出，满足了人们不同的需求。
无线对讲机，是以传递语音为主的无线通信工具。从电磁波信息传递的方式大体分为模拟方式和数字方式。传递模拟信号的无线对讲机，具有生产成本低、技术手段成熟、容易组网和使用简单方便的特点。但也容易被使用同类技术设备被监听或干扰。
数字式无线对讲机，是建立在以嵌入式计算机处理平台的技术装备，对信息的保密功能和多功能特性，是模拟式无线通信设备所不能比拟的。通信的信息是被数字化和压缩处理的，并可以用算法对数据进行加密，即使被同技术装备截获数据，也会因为不掌握本网加密算法，增加窃听或窃取信息内容技术难度。
但者两种技术装备都有一个共同特点，就是组成的通信网络必须在一固定的频率信道上完成，信道质量则易受多径衰落、同频干扰和邻频干扰影响，网络通信质量不可避免会受影响，通信的内容更容易受到攻击、干扰或窃取。
我们接触到的另一类无线通信代表产品，例如：移动通信工具(移动手机如GSM、CDMA方式等)和蓝牙近距离通信技术。为了解决电磁干扰、接收数据的可靠和信息的保密性，它们都采取了跳频技术，但它们只采用了一对一(配对方式或点对点方式)的通信模式。
与固定频通信相比，跳频通信的过程比较隐蔽也更加难以被截获。只要对方不清楚载频跳变的规律，即使是同类技术装备也很难截获通信内容。同时，跳频通信也具有良好的抗干扰能力，即使有部分频点被干扰，仍能在其他未被干扰的频点上仍进行正常的通信。
发明一种具有无线数字对讲机那样组网简单、通信保密和并具有可消除多径衰落、同频干扰、邻频干扰影响的无线数字跳频对讲机，也是业内精英们所共同瞻目的课题。
发明内容：
本发明的目的，是提供一种工作在ISM频段的无线数字跳频对讲机，组网内的同类对讲设备，在同一伪随机跳频参数的管控下，在不同频点同步跳频通信。大家能同时在线收听，又能分别对网内任何用户进行相互的语音或数据通信和方便组网的新型无线数字跳频对讲。
工作在ISM频段的无线数字跳频对讲机比通用无线数字对讲机具有更多的功能(以下叙述简称：无线数字跳频对讲机)：
1、采用数字跳频技术，工作频率按伪随机序列参数随机改变，网内设备按照“跳频图案”同步跳频工作，只要不掌握本网“跳频图案”，通信内容和数据就不会被网外同类技术设备所窃取和监听。
2、语音信号经声码器转换为数字信号在发送中，加入本网滚动密钥的加密处理，更能加大本网信息的保密等级。
3、组网方式是主、从方式，也就是说，跳频的指针、同步参数、通话滚动加密密钥和管理数据，均由主机产生并发送，从机在线听和在线讲，均受主机控制管理。从机在线讲话时，可代主机传送跳频同步信息。
4、主机和从机，均能以广播的形式发送和收听网内信息，系统具有通过主机限制网内某分机通过广播方式或与网内其他用户单独通话或交流信息功能。
5、主机可以指定某从机升级为主机，前主机则退出管理。
6、本发明的工作在ISM频段的无线数字跳频对讲机均设有告警键，从机按告警键后，该设备不会再收听或接收网内信息和通话。从机退出告警模式只能由主机确认并解除。主机按动告警键，自动退出主机位置，自动由指定的从机升级为主机替代其管理功能。
7、主机能直接控制从机退出网络，并禁止退出网络的设备接收网内的通信数据和通话，主机可以打开任何从机的PTT键，监听被控制的从机所在位置的环境背景声音。
8、本发明的工作在ISM频段的无线数字跳频对讲机特别设有分机旋钮，主要用来快速寻找被呼叫的分机或选择以广播方式发送语音或信息。
附图说明：
[根据细则26改正16.11.2016]　
图1是一种工作在ISM频段的无线数字跳频对讲机结构图
[根据细则26改正16.11.2016]　
图1中一种工作在ISM频段的无线数字跳频对讲机结构的组成分别为(以下叙述简称：无线数字跳频对讲机)：
1、无线数字跳频对讲机机壳；2、无线对讲机天线；3、功率放大器；4、ISM频段无线收发器；5、MCU控制管理芯片；6、声码器；7、液晶显示屏及LED发光管工作状态指示灯；8、功能设置键、告警键、数字键和PTT键；9、密钥输入接口、串行通信接口；10、MIC输入接口、耳机输出接口、PTT输入接口；11、电源管理电路；12、电池；13、电池充电接口；14、电源开关、音量旋钮；15、MIC麦克；16、SPK扬声器；17、分机旋钮等组成。
具体实施方案(以下叙述简称：无线数字跳频对讲机)：
其中：1、无线数字跳频对讲机机壳：是容纳、安装无线数字跳频对讲机所有结构组成的基础和壳体；2、无线数字跳频对讲机的天线：是用来发射和接收无线电信号的辐射体；3、功率放大器：与天线连接，主要功能是将由ISM频段无线收发器传送来的语音或数据信号进行功率放大，并通过天线辐射输出；4、ISM频段无线收发器：无线收发器的收、发方式和ISM频段的跳频工作频点受MCU控制管理芯片管控，主要处理由天线接收的信号，放大处理后的数据流，传递给MCU控制管理芯片处理；5、MCU控制管理芯片：当本机被确认为主机时，将产生跳频的伪随机序列码，按照其序列码，完成对本网络ISM频段无线收发器跳频管控；并向从机发送跳频指针；将由声码器传递的数字信号，并通过 ISM频段无线收发器发送；在液晶显示器上显示相应的网络信息和数据，并通过LED发光管表示当前的本机工作状态；6、声码器：将MIC麦克传送的语音信号进行数字化转化并压缩，并传送给MCU控制管理芯片传送，同时，也将MCU控制管理芯片，从ISM频段无线收发器接收到的被压缩的数字语音信号，通过解压缩处理还原为语音模拟信号放大后，通过SPK扬声器或耳机插孔输出；7、液晶显示屏及LED发光管工作状态指示灯：受控于MCU控制管理芯片，是显示无线对讲机用户数据设置过程、网络状态、本机工作状态的窗口和显示通过MCU控制管理芯片接收到的数据；8、功能设置键、告警键、数字键和PTT键：功能设置按键和数字键，是通过键盘对MCU控制管理芯片控制的无线数字跳频对讲机，进行功能设置和选择发送数据短语和选择信息发送对象的，PTT按键是用来发送语音或数据信息的按键，告警键是用来保护网络免受攻击的按键；9、密钥输入接口、串行通信接口：密钥输入接口是用来输入组网相关的跳频参数和滚动加密算法的输入接口，输入数据存放在MCU控制管理芯片E2PROM中。串行通信接口，是为后台下载数据和连接其他网络的数据通道；10、MIC输入接口、耳机输出接口、PTT输入接口：是用来连接外接耳机、话筒组或蓝牙对讲机适配器的通用接口；11、电源管理电路：连接无线对讲机的电池，管理电池充电过程和为无线数字跳频对讲机各用电电路提供用电的保障；12、电池：为无线数字跳频对讲机提供能源；13、电池充电接口：连接无线数字跳频对讲机的电池，为电池充电和提供充电时的用电保护；14、电源开关、音量旋钮：用来关断或打开无线数字跳频对讲机的电源和调节扬声器输出的音量；15、MIC麦克是无线数字跳频对讲机上的机载麦克，用来输入要传递的语音信号；16、SPK扬声器：是无线数字跳频对讲机上的机载扬声器，用来输出接收到的语音信号；17、分机旋钮：主要用来快速寻找被呼叫的分机或选择以广播方式发送语音或信息。

Claims (5)

  1. 一种工作在ISM频段的无线数字跳频对讲机，其主要结构由：(1)、无线数字跳频对讲机机壳；(2)、无线对讲机天线；(3)、功率放大器；(4)、ISM频段无线收发器；(5)、MCU控制管理芯片；(6)、声码器；(7)、液晶显示屏及LED发光管工作状态指示灯；(8)、功能设置键、告警键、数字键和PTT键；(9)、密钥输入接口、串行通信接口；(10)、MIC输入接口、耳机输出接口、PTT输入接口；(11)、电源管理电路；(12)、电池；(13)、电池充电接口；(14)、电源开关、音量旋钮、分机旋钮；(15)、MIC麦克；(16)、SPK扬声器；(17)、分机旋钮等组成。
  2. 如权利1所述的一种工作在ISM频段的无线数字跳频对讲机，其主要技术特征为：采用数字跳频技术，工作频率按伪随机序列参数随机改变，网内设备按照“跳频图案”同步跳频工作，只要不掌握本网内“跳频图案”，通信内容和数据就不会被网外同类技术设备所窃取和监听，其传输的语音信号经声码器转换为数字信号在发送中，加入滚动密钥的加密处理，更能加大本网信息的保密等级。
  3. 如权利1、2所述的一种工作在ISM频段的无线数字跳频对讲机，其组网方式为主机、从机方式，跳频的指针、同步参数、通话滚动加密解密密钥和管理数据，均由主机产生并发送，从机在线听和在线讲，均受主机控制管理，从机在线讲话时，可代主机传送跳频同步信息，同网技术设备均具有广播式发送与接听功能。
  4. 如权利1、2、3所述的一种工作在ISM频段的无线数字跳频对讲机，主机具有控制允许全部或部分从机收听广播信息和限制网内某分机与网内其他用户单独通话或交流信息功能。
  5. 如权利1、2、3所述的一种工作在ISM频段的无线数字跳频对讲机特别设有分机旋钮，主要用来快速寻找被呼叫的分机或选择以广播方式发送语音或信
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