Ultra wide band synchronization method

Abstract

The invention discloses a synchronization method of ultra wide band communication technology and relates to an ultra wide band synchronization method. The method comprises the following steps. Firstly, peak noise serves as a threshold, and long sliding step length is used for performing cross-correlation. When a ratio of the peak noise exceeds the preset threshold, a received signal is regarded to be captured correctly. Secondly, a small peak signal is output through a correlator, a smooth envelope curve output by the correlator is generated by secondary enveloping. Thirdly, the highest point of the envelope curve output by the correlator is taken as a center so as to confirm a thin synchronization interval. Fourthly, small sliding step length undergoes correlation again on the thin synchronization interval which is confirmed, and a peak value output by correlation is obtained and corresponding time shifting of a pilot frequency sequence is calculated. The problem of accuracy in confirming the thin synchronization interval by performing cross-correlation of the small sliding step length and obtaining the peak value, and precision in time delay estimation is improved.

Description

technical field [0001] The invention belongs to the technical field of ultra-wideband wireless communication, and in particular relates to an ultra-wideband synchronization method. Background technique [0002] Ultra Wideband (UWB for short) technology is a new type of wireless communication technology that has received widespread attention in recent years, and its transmission signal bandwidth can be as high as several gigahertz (GHz). UWB technology can generally be divided into two basic implementations of the pulse system and the carrier system. The pulse system UWB transmits information through the baseband pulse sequence, which has the advantages of simple system structure, low cost, low power consumption, etc., and has a wide range of applications in the fields of wireless communication, ranging, detection, etc. Detection, energy detection, analog correlation detection and other methods, whose processing performance is limited by analog processing, generally can only...

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Problems solved by technology

The commonly used synchronization structure for UWB systems is multi-integral parallel sliding correlation synchronization. This structure can greatly reduce the acquisition time, but it also increases the hardware complexity and the number of integrators required will also be greatly increased.

When the coarse correlation with a larger sliding step can reduce the number of integrators, the reliability of the fine synchronization interval determined with the peak point as the center will decrease, and the estimated time delay will not be accurate enough. How to reduce the Ensuring the accuracy of time delay estimation while maintaining the integrator branch has become an urgent problem to be solved

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