Spread spectrum parameter agile method based on random signals

Abstract

The invention provides a spread spectrum parameter agile method based on random signals. The method comprises the following steps: a legal sender acquires channel information and sends a locally generated initial random signal to a legal receiver; the legal sender generates a first random signal according to the channel information and the initial random signal; the legal receiver uses the received signal as a second random signal; the received signal comprises the initial random signal and the channel information; the legal sender and the legal receiver respectively quantize the first randomsignal and the second random signal by using the same quantization method to generate a first random sequence and a second random sequence; both the legal communication parties carry out consistency negotiation according to the first random sequence and the second random sequence, and consistent sequences are separately generated locally; and both the legal communication parties separately generate spread spectrum codes locally according to the consistent sequences. According to the spread spectrum parameter agile method based on random signals in the invention, the time-varying spread spectrum codes are generated by using the randomness of receiving signals so as to reach the purpose of spread spectrum parameter agility, thereby improving the secrecy and safety of spread spectrum communication.

Description

technical field [0001] The invention relates to the technical field of spread spectrum communication, in particular to a random signal-based spread spectrum parameter agility method. Background technique [0002] Spread spectrum includes direct sequence spread spectrum, frequency hopping, ultra-wideband and other spread spectrum technologies. The so-called spread spectrum communication is an information transmission method, and the frequency bandwidth occupied by the transmitted signal is much larger than the minimum bandwidth necessary for the transmitted signal. Although spectrum resources (such as spectrum resources) are very precious, communication requirements under specific conditions can be met through spectrum expansion. For example, spread spectrum communication spreads the information in a frequency band much larger than the signal bandwidth, and compresses the power spectral density of the spread spectrum signal below the noise threshold. It is very difficult fo...

AI Technical Summary

Problems solved by technology

However, in many scenarios (such as the Internet of Things with massive low energy storage, low computing performance, and frequent switching of adjacent nodes), the pre-allocation, storage, and update of spreading codes face unprecedented challenges, which limits the application of spread-spectrum communication.

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