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ground wave 【電學】地波。

ground wire

Combine with the project “ hf ground wave radar supervise sea status “ of state 863 project , retrieving wind direction from hf radar doppler spectrum and the showing of wind field , current field , wave field are researched in this paper . the problem of how to represent the sea surface parameters by computer is concerned , too 本文結合863 - 818 - 01 - 02課題“高頻地波雷達海洋環境監測技術” ,研究了由高頻雷達海面回波提取風向信息和海面風場、浪場、流場信息的計算機表征方法及其數據傳輸反演和表征的若干問題。

The work presented in this paper is carrying out to the theory research of dbf . the work includes : research of dbf algorithms , dbf antenna system composition and realization . the application of dbf algorithms used in high frequency ground wave radar for near ocean inspection and ocean situation remote sensor is also presented . at last , we give a effective scheme to implement broad - band constant beamwidth digital beam - former 本文的主要工作是圍繞數字波束形成技術的理論研究,內容包括:數字波束形成算法的研究,數字波束形成天線的系統構成和實現,以及將數字波束形成算法應用于高頻地波雷達近海監測和海態遙感,最后給出了一種寬帶恒定束寬數字波束形成器的設計方案。

High frequency radar is also a high frequency ground wave super resolution radar used on the seaside , and meantime it is one of projects of national 211 for building subject . this paper based on high frequency radar and modern signal processing describes the component of the high frequency radar on function and hardware . the signal that the radar system used mostly decides the capability and the complex of the radar 雷達系統所用的信號體制、信號形式決定了在很大程度上決定了雷達的性能指標,雷達系統的復雜度,本文主要研究基于軟件高頻雷達的多體制信號的數字化產生與接收,目的在于產生一種或者多種能夠軟件高頻雷達所適用的信號,并且這種信號不會給小型化的系統處理帶來過高復雜性。

The dissertation aimed at designing a new signal processor basing on the development of hardware and the signal process of high frequency ground wave over - the - horizon radar . after that , basal signal software of dsp , a important part of processing card , is designed 本課題目的就是根據當今數字信號處理器件的發展和高頻地波雷達的信號處理過程,提出信號處理機的系統設計方案,然后對其中信號處理板中的主要處理部件dsp進行基礎軟件的開發。

Abstract : the more detailed mathematial derivation and analysis of watson transformation in diffraction theory of ground wave is made by two different method . in derivation necessary and approximate conditions requred to make the transformation are specially discussed 文摘:采用兩種不同的方法對地波繞射理論中的瓦特松變換問題做了較詳細地數學推導,并著重討論了做瓦特松變換的要求的必要條件與近似條件。

Based on the research mentioned above , the paper introduces the method of how to realize basal software , combing the processing of high frequency ground wave over - the - horizon radar signal and the capability of dsp 在此基礎上,本論文又針對工程實現的具體要求,結合高頻地波超視距雷達信號的信號處理方法與dsp性能,敘述了信號處理機的基礎軟件編程的具體實現。

To the principle of single - station high - frequency ground wave detection radar , simple pulse wave was chosen , but this wave has many limitations , so continuous signal wave was preferred 從雷達信號波形選擇來看,對于單站高頻地波超視距雷達體制,最初采用簡單脈沖波形。但這種波形存在著許多缺點,最終采用連續波信號體制。

High frequency ground wave radar for near ocean inspection and ocean remote sensor is a method that use ocean echo wave dopier spectrum to deduce the parameters of ocean situation 高頻地波雷達近海監測和海態遙感技術是一種利用海洋回波多普勒譜反演海態參數的方法。

Then , i design a new signal processor basing on the development of hardware and the signal process of high frequency ground wave over - the - horizon radar 接著,根據當今數字信號處理器件的發展和高頻地波雷達的信號處理過程,提出信號處理機的系統設計方案。

During the near three decades , high - frequency ground wave radar detecting for sea has been regarded for its high performance by many countries 近三十年來,高頻地波對海探測雷達因其本身所特有的優點而引起了許多國家的高度重視。

In this project high frequency ground wave soft radar ( hfgwsr ) uses software radio technology to control radar functional mode 本課題項目中的軟件高頻地波雷達利用軟件無線電技術,實現對雷達工作狀態的控制。

Signal processor is a important part of high frequency ground wave over - the - horizon radar 信號處理機是高頻地波超視距雷達的關鍵部件之一。