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Non-sinusoidal time domain orthogonal demodulation signal synchronization method

A technology for modulating signals and signal synchronization. It is applied in the communication, electrical components, transmission systems and other directions between multiple stations. It can solve problems such as synchronization difficulties, and achieve the effect of good synchronization performance and simple structure.

Active Publication Date: 2013-10-09
中国人民解放军海军航空大学航空作战勤务学院
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Problems solved by technology

[0008] The purpose of the present invention is to provide a signal synchronization method to solve the problem of difficult synchronization of multi-channel orthogonal PSWF modulation signals due to the multi-amplitude autocorrelation characteristics of band-pass PSWF, and to achieve accurate and fast synchronization

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  • Non-sinusoidal time domain orthogonal demodulation signal synchronization method
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  • Non-sinusoidal time domain orthogonal demodulation signal synchronization method

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Embodiment

[0044] Design requirements: In the 100kHz ~ 100.3kHz communication channel, based on the time-domain orthogonal PSWF pulse group, the non-sinusoidal time-domain quadrature modulation method is used to transmit information. The communication channel is divided into 5 sub-channels, and the spectrum of adjacent sub-channels The overlap is 50%, the sub-channel bandwidth is 100Hz, and the synchronization method proposed by the present invention is adopted to design an auxiliary sequence to realize signal synchronization.

[0045] Using the synchronization method proposed by the present invention, the above-mentioned design requirements can be implemented according to the following steps.

[0046] ①Single-peak baseband PSWF pulse design.

[0047] It can be seen from the design requirements that the communication sub-channel spectrum bandwidth is 100Hz, that is, B 0 = 100Hz. In the 0-100Hz baseband frequency band, the algorithm based on eigenvalue decomposition is used to solve the...

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Abstract

The invention provides a non-sinusoidal time domain orthogonal demodulation signal synchronization method based on an auxiliary sequence. The method comprises the following steps that: the data is transmitted based on the frame format; a sender adopts a barker code with good autocorrelation characteristic to modulate prolate spheroidal wave functions (PSWF) with a single-peak characteristic; a sinusoidal carrier modulates the functions and moves the spectrum thereof into a communication sub-channel, and then pluses the same to the sinusoidal carrier with 90 degrees of phase shift so as to form the auxiliary sequence; and a receiver first extracts a new auxiliary sequence with the single-peak characteristic from the received auxiliary sequence, and captures synchronous signals. The synchronization method solves the problem of difficult synchronization caused by the multi-peak auto-correlation characteristic of non-sinusoidal time domain orthogonal demodulation signals, offers effective technical support to realize high-efficiency non-sinusoidal communication, and has important value.

Description

technical field [0001] The present invention relates to a signal synchronization method in radio communication, in particular to a signal synchronization method based on an auxiliary sequence. Background technique [0002] The concept of non-sine wave communication has a history of more than 40 years since it was proposed in the 1960s. Its proposal breaks the inherent mode of traditional design of communication system based on sine function and broadens the field of communication research. Despite this, non-sine wave communication has not been popularized and applied, and it has only been used in baseband communication systems and ultra-wideband communication systems so far. [0003] In the original non-sinusoidal wave communication system, the generation and control of non-sinusoidal functions are constrained, and the non-sinusoidal functions used usually contain rich low-frequency components and even DC components, so that the non-sinusoidal wave modulation signal has a l...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04B7/26H04B1/7077
Inventor 王红星赵志勇陈昭男
Owner 中国人民解放军海军航空大学航空作战勤务学院
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