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Differential chaos shift keying modulator and method for re-differential permutation indexing

A technology of permutation index and shift keying, which is applied in modulation carrier system, transmission monitoring, digital transmission system, etc., can solve the problem of low data transmission rate, achieve energy saving in transmission, reduce bit error rate, and improve bit error performance Effect

Inactive Publication Date: 2021-07-13
FUZHOU UNIV
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Problems solved by technology

[0004] Since the DCSK system can only transmit 1 modulation bit in one symbol period, the data transmission rate is low

Method used

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  • Differential chaos shift keying modulator and method for re-differential permutation indexing
  • Differential chaos shift keying modulator and method for re-differential permutation indexing
  • Differential chaos shift keying modulator and method for re-differential permutation indexing

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] This embodiment provides a differential chaotic shift keying modulator with differentially arranged indexes. The transmission bit stream is divided into (n+1) bits as a module, and the bit information of the i-th transmission module is written as [a i，1 , a i，2 ,...,a i，n+1 ]=[S i , a i，n+1 ], where S i =[a i，1 , a i，2 ,...,a i，n ] represents the n mapping bits of the i-th sending module, a i，n+1 Indicates the modulation bits of the i-th transmission module.

[0046] At the sending end, the chaotic signal generator generates the chaotic sequence of the β sample signal as the reference signal of the first sending module, and sends the reference signal to the permutation module, which operates according to the predefined permutation rules to obtain different permutation copies. The predefined permutation rules are to make the permuted repl...

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Abstract

The invention relates to a differential chaos shift keying modulator with re-differential permutation indexing. In a DPI-DCSK single-user transmission scheme, reference signals of (n + 1) bits transmitted each time are information bearing signals of the first (n + 1) bits at the same time, so compared with a PI-DCSK system, chaotic reference signals without bearing bit information are transmitted; according to the DPI-DCSK scheme, the problem of waste of transmission energy is solved. Compared with the traditional PI-DCSK system, the method provided by the invention has better bit error performance, effectively reduces the bit error rate and saves half of transmission energy.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a differential chaotic shift keying modulator and method for differentially arranged indexes. Background technique [0002] As an important branch of science, nonlinear science is one of the hot topics in today's academia, and it can well solve the limitations of Newtonian mechanics. Chaos is an important part of nonlinear science, known as the third revolution in physics. Chaotic signals are easy to generate, broadband, non-periodic, deterministic, noise-like, and have good autocorrelation and cross-correlation. These characteristics are very important for improving multi-user access performance, improving anti-interference ability and anti-multipath effect, which makes chaotic signals more and more widely used in spread spectrum communication systems. At the same time, chaos communication also has good development prospects in secure communication and ultra-wid...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04B1/69H04B17/336
CPCH04L27/001H04B1/69H04B17/336
Inventor 陈平平柳粟杰陈锋陈海频
Owner FUZHOU UNIV
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