Channel width agile communication method

A channel width agile and secure communication method, comprising:

• step 1 (S101):
• at analog/Radio Frequency (RF) transmitting end of a wireless communication system, analog-to-digital converting original signal to digital signal, and then channel-encoding the digital signal to increase redundancy and reduce errors, and then immediately modulating the encoded digital signal into transmission symbol, and then transmitting communication information;
• step 2 (S102):
• by means of a channel generation circuit provided at the analog/RF transmitting end of the wireless communication system, generating a channel with a variable channel width, changing the channel width occupied by the transmitted information according to a variation law, wherein the variation law of the channel width is a channel agile spectrum, the channel agile spectrum is used to perform a first encryption on the communication information, and then a frequency hopping is used to perform a second encryption thereon;
• and then transmitting the information encrypted by the channel agile spectrum and the frequency hopping through the analog/RF transmitting end of the wireless communication system, and then transmitting it to an analog/RF receiving end of the wireless communication system through air or other transmitting end medium;
• step 3 (S103):
• by means of a channel detection circuit provided at the analog/RF receiving end of the wireless communication system, detecting the channel width corresponding to the transmitted information, and then generating a receiving channel with a corresponding width;
• step 4 (S104):
• receiving the communication information according to the channel agile spectrum determined by two parties in advance, then identifying the processed signal by means of demodulation and decoding, and finally obtaining the information transmitted from the other party.