The Research on PN Code Synchronization and Broadcast Based on Address Mapping
首发时间:2014-01-14
Abstract:In some application fields of indoor positioning and navigation in wide area, semi-enclosed regions such as aisles with window and lobby, need the joint location calculation among positioning signals from outdoor and indoor, to realize more precise location and better navigation signal coverage. It is the key question that how synchronize the outdoor and indoor signals with less synchronization error to reach high accuracy location calculation. This paper introduced the research on generation mechanism of two signals' synchronization error and proposed a wireless address mapping process. External codes are one to one correspondence with local address by address coding algorithm and mapped to internal codes through local addresses. Accumulation errors in code can be removed to realize excellent synchronous replicating between external and internal codes. In actual test, synchronization precision is able to achieve 0.0048 code chip which is better than current methods. It can provide well synchronization and stability for joint multi-code calculating in LBS and navigation application.
keywords: Time Synchronization Code Replication Mapping relationship Jonit calculation
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基于地址映射的扩频码同步与播发的研究
摘要:在广域室内定位导航中,为了实现更精确定位与更大范围导航信号覆盖,在某些特定的室内区域,如靠窗走廊、大堂等半封闭式区域,需要利用室外播发的定位导航信号与室内播发的定位导航信号进行联合位置解算,而如何使室外信号与室内信号间能够以较小误差同步是实现高精度位置解算的关键问题。本文通过对室内与室外信号间同步误差产生机理进行研究,进而提出一套无线地址映射机制,通过本地地址编码算法对外部扩频信号进行一一对应,并映射到内部扩频信号,从而消除码片累积误差,实现外部扩频信号与内部扩频信号的高同步播发,实测精度达到0.0048码片,远高于现有同步方法,满足LBS高精度定位与导航业务中良好稳定的时间同步需求。
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No.4580865951993138****
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基于地址映射的扩频码同步与播发的研究
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