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題名 | 用於全球衛星定位系統之盲蔽反干擾前處理器=A Blind Anti-jammer Pre-processor for GPS Receivers |
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作者 | 林垂彩; 林偉堅; 賴宜潁; Lin, Tsui-tsai; Lin, Wei-jian; Lai, Yi-ying; |
期刊 | 聯大學報 |
出版日期 | 20050600 |
卷期 | 1 民94.06 |
頁次 | 頁16-23 |
分類號 | 448.5 |
語文 | chi |
關鍵詞 | 全球衛星定位系統; 反干擾前處理器; Global positioning system; GPS; Jammer; Anti-jammer pre-processor; |
中文摘要 | 本論文中,吾人提出一具有新穎盲蔽反干擾前處理的全球衛星定位系統(Global Positioning System, GPS)接收機,藉以改善因強干擾所造成的系統效能衰降。此接收機之設計包含以下信號處理流程:首先根據接收資料相關矩陣之特徵值分散的特性發展出一反干擾前處理器,以確保相關器輸入端具有較低之干擾對信號比,接著建立最佳化合成器,藉以產生零點去濾除強干擾並形成一主波束來接收所欲信號,然後將最佳化合成器之輸出傳送至GPS相關器,以取得位元流,最後利用GPS每個子框架之已知八位元報頭(Preamble)來補償合成器對目標信號所造成的相位旋轉。 |
英文摘要 | In this paper, a novel GPS receiver incorporating with blind anti-jammer pre-processing is proposed to alleviate performance degradation due to strong jammers. The design of the receiver involves the following procedure. An anti-jammer pre-processing scheme prior to the correlators is first developed based on the eigen-value spread of the received data correlation matrix for assuring the reasonable level of jammer-to-signal ratio (JSR) in the inputs of correlators. An optimal combining is then constructed so as to produce nulls for suppressing the strong jammers and a mainbeam for receipting the signals-of-Interest (SOIs). The outputs of the optimal combiner are sent to the regular GPS correlators to restore the bit stream. Finally, the pre-determined 8-bit preambles in the first word associated with each subframe of GPS data are used to compensate the phase rotation introduced by the combiner performed on the SOIs. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。