Abstract
The passive radar is a hot research topic. A multi-channel wideband passive radar experimental system is designed and the digital television terrestrial broadcasting (DTTB) signal is chosen to carry out the target detection experiment of civil aviation aircraft. The polarization and spatial filtering methods are used to solve the strong direct path interference suppression problems brought by the receiving system location; combined with the characteristics of DTTB signal, the block length selection interval in the block batch processing method for range-Doppler images calculation is given; the clutter suppression performance is compared through the experimental data receiving from different bistatic polarization channels, the conclusion is different from the monostatic radar and it can guide the passive radar experiment.
Highlights
Passive radar, using transmissions of opportunity, has the potential advantages of anti-stealth and anti-jamming
Using the Digital Television Terrestrial Broadcasting (DTTB) signal as the radiation source of the passive radar can achieve the longer detecting distance and higher range resolution, so it has been widely studied in several research institutions
As well known that the DTTB signal is transmitted with the horizontal polarization, and it is found that there is 10 dB difference between the received signals by horizontal and vertical polarized antenna in the reference channel, so the vertical polarized antenna is used for reducing the direct path interference
Summary
Passive radar, using transmissions of opportunity, has the potential advantages of anti-stealth and anti-jamming. The digital broadcasting system, such as DVB-T, is widely used in the world It has the advantages of wide range and remote distance of signal coverage, easy to obtain and easy processing. This signal covers a wide area and has a wide bandwidth, so the use of this signal as a radiation source can obtain better detection ability and higher range resolution. A wideband passive radar receiving system can be adapted to different scenarios if the working frequency can be set freely and the signal processing software can be re-constructed. The DTTB signal is chosen to carry out the detection experiment of civil aviation aircraft based on this experimental system
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