WIRELESS DIGITAL FREQUENCY-HOPPING TWO-WAY RADIO WORKING IN ISM BAND

摘要

The present invention relates to a wireless digital frequency-hopping two-way radio working in an ISM band. The wireless digital frequency-hopping two-way radio uses digital frequency hopping technology. The working frequency of the wireless digital frequency-hopping two-way radio randomly changes according to pseudo-random sequence parameters, so that multi-path fading, co-channel interference and adjacent channel interference can be effectively prevented and eliminated, and a wireless frequency resource utilization rate can be increased. A device inside a network carries out synchronous frequency-hopping working according to a "frequency-hopping pattern", and as long as a "frequency-hopping pattern" in this network is not kept in hand, contents of communication and data cannot be stolen or monitored by technical devices of the same kind outside the network. The process of frequency-hopping communication, compared with fixed frequency communication, is more covert and is also difficult to intercept. As long as a counterpart does not know the rule of carrier frequency hopping, it is difficult even for the technical devices of the same kind to intercept the contents of communication. Meanwhile, frequency-hopping communication also has a good anti-interference capability, and even though part of frequency points are interfered with, normal communication can be still carried out on other interference-free frequency points. The wireless digital frequency-hopping two-way radio working in the ISM band involved in the present invention mainly comprises: 1. a wireless digital frequency-hopping two-way radio housing; 2. a wireless two-way radio antenna; 3. a power amplifier; 4. an ISM band wireless transceiver; 5. an MCU control management chip; 6. a vocoder; 7. a liquid crystal display screen and an LED working status indicator lamp; 8. a function setting key, an alarming key, number keys and a PTT key; 9. a secret key input interface and a serial communication interface; 10. an MIC input interface, an earphone output interface and a PTT input interface; 11. a power management circuit; 12. a battery; 13. a battery charging interface; 14. a power switch and a volume knob; 15. a microphone (MIC); 16. a speaker (SPK); 17. an extension knob, etc. A networking mode of the wireless digital frequency-hopping two-way radio is a master-slave mode. A frequency hopping pointer, synchronization parameters, a rolling encryption and decryption secret key for communication, and management data are all generated and sent by a master, and slaves are used for listening and talking on line, and are all controlled and managed by the master. When being used for talking on line, the slaves can replace the master to transmit frequency-hopping synchronization information. Technical devices in the same network all have broadcast type sending and answering functions. The wireless digital frequency-hopping two-way radio working in the ISM band involved in the present invention is especially provided with the extension knob, and is mainly used for quickly seeking a called extension or selecting to send voices or information in a broadcast mode.