The hardware design of a new ionospheric sounding system

Abstract

The ionospheric sounding system is a type of high-frequency over-the-horizon skywave radar developed for ionospheric research and HF channel management. The hardware system of a portable low-power multifunctional ionospheric sounding system is presented in this paper. The device can be used for typical ionospheric sounding and spectrum monitoring at monostatic and bistatic station. The system structure and the primary module are depicted in detail. Typical experimental results demonstrate that the design of this device is successful for ionospheric researching.

HF hybrid sky‐SWR system based on MIMO technology

“…By setting the appropriate for every scan cycle, signals of different frequencies will have different . After two fast Fourier transforms (FFTs), the echo signals of different frequencies are separated on the Doppler spectrum, the multi‐frequency synchronisation can be realised, and the distance and velocity information of the detected targets implied in the echo signals is obtained [20–22]. On the basis of this method, when networking is necessary, signals launched from multi‐stations can also be distinguished by using the source of the Doppler offsets even when working at the same frequency.…”

Wuhan Ionospheric Oblique Backscattering Sounding System and Its Applications—A Review

“…In 2014, Sun et al [50] introduced the linear frequency-modulated continuous waveform (LFMCW) for WIOBSS. Due to the lower Doppler sensitivity of this waveform, it can be well employed for monitoring aircraft and the ocean.…”

“…The pulse compression and coherent spectrum integration were described in detail in [46,76] when the binary phase-coded waveform and the LFMCW were adopted, respectively. Furthermore, Chen [88] introduced the constant false alarm rate (CFAR) algorithm for echo signal detection in WIOBSS, and Wang [89] developed the adaptive CFAR processor to increase the probability of detecting weak echoes.…”

“…Since the binary phase-coded waveform is sensitive to the Doppler shifts, it cannot be applied in the case of fast-flying aircraft detection unless additional Doppler compensation algorithms are added. In 2014, Sun et al [ 50 ] introduced the linear frequency-modulated continuous waveform (LFMCW) for WIOBSS. Due to the lower Doppler sensitivity of this waveform, it can be well employed for monitoring aircraft and the ocean.…”

A novel dual-channel HF radar system for ionospheric sounding

“…Electronic Information School of Wuhan University began to develop its own ionospehric sounding system in 2001, and a series of equipments have been developed [4,5,6]. In this paper, a novel dual-channel HF radar system for ionospheric sounding, which is called Wuhan Multifunctional Ionosonde with dual channels (WMI-DC), is introduced.…”