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首页> 外文会议>14th international technical meeting of the Satellite Division of the Institute of Navigation (ION GPS-2001) >An Investigation of the Adaptive Spatial Temporal SelectiveAttenuator
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An Investigation of the Adaptive Spatial Temporal SelectiveAttenuator

机译：自适应时空选择性衰减器的研究

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The vulnerability of the GPS signal against any kind ofrninterference is known. Any interference signal near the bandrnof the GPS signal can saturate the GPS receiver and at thernsame time can deteriorate the autocorrelation properties ofrnthe GPS signal and its PRN code, which results in loss ofrnlock of the GPS signal. An adaptive spatial temporalrnselective attenuator (ASTSA) can be successfully utilized tornmitigate the undesired effects of widebandarrowbandrninterference sources.rnThe analytical development of this investigation exploits thernfundamental issues regarding a new adaptive methodology,rnthe impact of the array elements, and the number of temporalrnshifter delays for a given desired signal frequency on thernASTSA performance against one broad band jammer (BBJ)rnand one continuous wave jammer (CWJ). The new adaptivernmethodology exploits the crosscorrelation propertiesrnbetween a locally generated signal and the received signal.rnThe old adaptive technique utilizes a pointing (or steering, orrnsignature) vector to compute the desired set of multipliers,which act as terms of a finite impulse response digital filter.rnThe new adaptive methodology allows restoring the phase ofrnthe signal coming out of the ASTSA. Results from severalrnsimulation experiments are presented to assess thernperformance of the old and new adaptive techniques.rnWe suspect that this investigation could be particularlyrnvaluable for the implementation of ASTSAs or analogousrnsystems that will operate on the L5 frequency as well as forrnASTSAs which are undergoing implementation for either thernL1 or L2 frequency.
机译：GPS信号抵抗任何形式的干扰的脆弱性是已知的。 GPS信号频带附近的任何干扰信号都会使GPS接收机饱和，并且同时会使GPS信号及其PRN码的自相关特性恶化，从而导致GPS信号失锁。自适应空间时域选择性衰减器（ASTSA）可以成功地用于消除宽带/窄带干扰源的不良影响。这项研究的分析发展利用了与新的自适应方法有关的基本问题，阵列元件的影响以及时移器延迟的数量对于一个宽带干扰器（BBJ）和一个连续波干扰器（CWJ），在给定的期望信号频率上对ASTSA性能的影响。新的自适应方法利用了本地生成的信号与接收信号之间的互相关特性。旧的自适应技术利用指向（或指向或正交）矢量来计算所需的乘数集，这些乘数集用作有限脉冲响应数字滤波器的项。新的自适应方法可以恢复从ASTSA发出的信号的相位。提出了一些模拟实验的结果，以评估旧的和新的自适应技术的性能。我们怀疑，这项研究对于以L5频率运行的ASTSA或类似系统以及正在为rnL1实施的ASTSA的实施可能特别有价值。或L2频率。

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