目前，器件性能是實現理想軟件無線電的主要限制因素，隨著微電子技術及大規模
集成電路的發展，實用軟件無線電正向理想化逐步邁進。本文介紹了數字接收機ICS554 的結構及特點。給出了其在軟件高頻雷達系統中的應用實例，其中包括系統硬件原理圖，數字接收機模塊的軟件設計思想及其工作流程圖。并且測試了其性能，實測結果表明該數字接收機工作穩定、性能良好，目前已經應用于軟件高頻雷達系統之中。
關鍵詞：軟件無線電；ICS554；模數轉換；數字下變頻；高頻雷達
Abstract：At present, the component performance is the main limiting factor of realizing ideal
software radio, with the development of microelectronics technology and large-scale integrated circuit, practical software radio is marching gradually towards idealization. This article introduced the structure and the characteristic of the digital receiver ICS554. Giving its application example in the software high frequency radar system, including the system hardware schematic diagram, the digital receiver module software design concept and the work flow chart. And has tested its performance, the actual result indicated that this digital receiver works stably, its performance is good, at present it has already applied in the software high frequency radar system.
Keywords：Software Radio; ICS554; ADC; DDC; High-Frequency Radar