Differential chaotic shift keying modulation and demodulation device based on code subscript modulatio

A modulation and demodulation and chaotic technology, which is applied in the field of differential chaotic shift keying modulation and demodulation devices, can solve the problems of bit energy loss, low data transmission rate and low energy efficiency, and achieve energy saving, increase data transmission rate, increase The effect of large bandwidth
CN106209712AInactive Publication Date: 2016-12-07XIAMEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN UNIV
Publication Date
2016-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to digital modulation and demodulation of wireless communications, more particularly to a differential chaotic shift keying modulation and demodulation device based on the code subscript modulation. The modulation and demodulation device is provided with a modulator and a demodulator, wherein the modulator is provided with a chaotic carrier generator G; a delay unit D1; a multiplier a; a multiplier b; a bit-to-symbol converter f; a bit-to-symbol converter g; a Walsh code selector S; a square-wave generator e and a modulator transfer switch Q1; and the demodulator includes a receiver R; a delay unit D2; M square-wave generators S<1>, S<2>, ..., S<M>; M first-path multipliers M<1, 1>, M<1, 2>, ..., M<1, M>; M second-path multipliers M<2, 1>, M<2, 2>, ..., M<2, M>; M accumulators Ac<1>, Ac<2>, ..., Ac<M>; M absolute value pickers Ab<1>, Ab<2>, ..., Ab<M>; a comparator C; a demodulator transfer switch Q2; a resolver h and a symbol-to-bit converter k.
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Description

technical field

[0001] The invention relates to digital modulation and demodulation of wireless communication, in particular to a differential chaotic shift keying modulation and demodulation device based on code subscript modulation. Background technique

[0002] Differential Chaotic Shift Keying (DCSK: Differential Chaotic Shift Keying) is a kind of digital modulation and demodulation technology with chaotic signal as the carrier. The wide spectrum of chaotic signals makes DCSK an excellent spread spectrum communication technology and an alternative to traditional spread spectrum technology. DCSK technology has strong competitiveness in anti-multipath interference and low-cost ultra-wideband communication systems, and has good application prospects in the field of short-distance wireless communication.

[0003] The existing differential chaotic shift keying modulator includes chaotic carrier generator, delay unit, bit-to-symbol converter, multiplier and switch; the demodu...

Claims

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