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首页> 外文会议>2015 Global Conference on Communication Technologies >Correlator based group delay measurement for delta-DOR signals
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Correlator based group delay measurement for delta-DOR signals

机译：基于相关器的增量DOR信号群时延测量

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摘要

Very Long Base Line Interferometry (VLBI) is a technique that allows determination of angular position of spacecraft by measuring the geometric time delay between received radio signals at two geographically separated base stations. Delta Differential One Way Ranging (Delta-DOR) is an application of VLBI where delay measurements of a spacecraft radio signals are compared with delay measurements of angularly nearby quasar radio signals. Delta-DOR is a framework that can increase the accuracy of deciding the Spacecraft position in deep space when combined with other navigation techniques. Navigation and tracking of spacecraft is rudimentary until it reaches its designated orbit. The Delta-DOR correlator system gathers signals from independent antennas which are then processed to find essential data used for guidance and navigation of spacecraft. The high speed parallel correlator designed can calculate delay up to 64 lags, with a maximum integration time of 800μs. The design was synthesized using Xilinx ISE 14.1 and simulated with ISim and validated on Virtex-5 family ML510 Embedded Development platform. The correlator structure chosen is amenable for expansion to calculate larger lags in future.
机译：超长基线干涉测量法（VLBI）是一项技术，可通过测量两个地理上分离的基站在接收到的无线电信号之间的几何时间延迟来确定航天器的角位置。 Delta差分单向测距（Delta-DOR）是VLBI的一种应用，其中将航天器无线电信号的延迟测量结果与附近邻近类星体无线电信号的延迟测量结果进行比较。 Delta-DOR是一种框架，与其他导航技术结合使用时，可以提高确定航天器在深空位置的准确性。在到达指定轨道之前，对航天器进行导航和跟踪是基本的。 Delta-DOR相关器系统从独立天线收集信号，然后对其进行处理，以找到用于航天器制导和导航的基本数据。设计的高速并行相关器可以计算多达64个延迟的延迟，最大积分时间为800μs。该设计使用Xilinx ISE 14.1进行了综合，并使用ISim进行了仿真，并在Virtex-5系列ML510嵌入式开发平台上进行了验证。所选的相关器结构适合将来扩展以计算更大的滞后。

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