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Chaos coordinating communication method based on UKF (unscented Kalman filter)

A collaborative communication and chaos technology, applied in baseband system components, digital transmission systems, electrical components, etc.

Inactive Publication Date: 2013-01-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, terminal equipment often only has one antenna

Method used

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  • Chaos coordinating communication method based on UKF (unscented Kalman filter)
  • Chaos coordinating communication method based on UKF (unscented Kalman filter)
  • Chaos coordinating communication method based on UKF (unscented Kalman filter)

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Embodiment

[0051] A chaotic cooperative communication method based on UKF, comprising the following steps:

[0052] (1) if figure 1 As shown, in the first time slot, user 1 sends the carrier signal it uses to user 2 and the base station at the same time, and user 2 also sends the carrier signal it uses to user 1 and the base station at the same time; suppose the base station in the first time slot receives the carrier signal used by user 1 The carrier signal of The received carrier signal of user 2 is

[0053] in is the L+1 order impulse response between user 1 and base station, x 1 (k) is the carrier used by user 1, w 1d (k) is the additive Gaussian white noise of user 1; in is the L+1 order impulse response between user 2 and the base station, x 2 (k) is the carrier used by user 2, w 2d (k) is the additive Gaussian white noise of user 2;

[0054] (2) if figure 2 As shown, in the second time slot, user 1 amplifies the received carrier signal of user 2 and forwards it to...

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Abstract

The invention discloses a chaos coordinating communication method based on a UKF (unscented Kalman filter). On the basis of a chaos difference phase shift keying (PSK) communication system, a UKF algorithm is applied to estimate a carrier signal, and the estimated carrier signal is taken as a reference signal and a subsequently transmitted user information signal after being demodulated. According to the UKF algorithm, a noise component in the reference signal is decreased, bit error property is effectively improved, additionally, according to a changing speed of a channel, a frame number ratio of an appropriate reference signal to the user information signal is selected, and the frame number of required transmitting signals is reduced.

Description

technical field [0001] The invention relates to a chaotic cooperative communication method, in particular to a UKF-based chaotic cooperative communication method. Background technique [0002] Chaotic communication has many advantages over traditional communication because of its sensitivity to initial conditions, seemingly random behavior, and continuous broadband power spectrum. Chaos communication is divided into two types: coherent communication and non-coherent communication. Although coherent communication such as chaotic phase shift keying (Chaos Shift Keying, CSK) has good bit error performance, it requires chaotic synchronization, which is very difficult in the actual communication environment. Difficult to achieve. Differential chaos shift keying (DCSK) is a classic technology in non-coherent communication, which does not require chaos synchronization, but its bit error performance is obviously inferior to that of CSK communication system. Therefore, many scholar...

Claims

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Application Information

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IPC IPC(8): H04L27/00H04L25/02
Inventor 胡志辉谢宗伯冯久超
Owner SOUTH CHINA UNIV OF TECH
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