基于伪随机码调相脉冲压缩体制的电离层斜向返回探测系统可得到电离层的双时响应、散射函数、多径展宽等有用信息，是一种新型的电离层探测系统。该文重点讨论该系统中接收通道的开发与实现。该接收通道的设计基于软件无线电思想，以DSP技术为核心，具有处理方式灵活、实时处理能力强、稳定性好、升级空间大等优点。雷达系统的探测实验结果表明，该接收通道可以满足电离层斜向返回探测需要。

The Ionospheric Oblique Backscattering Sounding System(IOBSS), a new type of ionosonde, which bases on the pseudo-random noise (PN) phase modulated pulse compression, can obtain much useful information such as the bi-time response, scatter function and multi-path extension. This paper especially introduces the research and realization of the receiving channel in the IOBSS. The design of the receiving channel adopts the thought of software radio, and utilizes the DSP technology as the core of whole system, which provides the channel the advantages of flexible processing methods, real-time digital processing, great stability and easiness of upgrading. The sounding results indicate that the receiving channel is fit for the ionospheric oblique backscattering sounding.

TN957.5

国家自然科学基金资助项目（40474060）.