Single-channel LTE radar system based on communication/radar integration

Abstract

The present invention discloses a single channel LTE radar system based on communication / radar integration. The system comprises an up link, a down link and a radar signal processing unit of a radar receiver, wherein a reconstructed direct wave signal is generated via the up link comprising a channel coding module, a scrambling module, a digital modulation module, a layer mapping module, a pre-coding module and an OFDM symbol generation module orderly and is sent to the radar signal processing unit, and the down link comprises a timing synchronization module, a frequency offset estimation module frequency correction module combining a frequency offset estimation module, an OFDM demodulation module, a channel estimation module, an equalization module, a PBCH reception module, a PCFICH reception module, a PDCCH reception module and a PDSCH reception module. The single channel LTE radar system based on communication / radar integration of the present invention fully utilizes the mobile communication signal information, enables a passive radar system to be simplified and a reception terminal to be changed from a dual-antenna system into a single-antenna system, also enables the signal processing precision to be improved.

Description

technical field [0001] The invention relates to a passive radar receiver signal processing technology in the field of mobile communication, in particular to a single-channel passive radar system. Background technique [0002] Passive radar (also known as passive radar, external radiation source radar) is essentially a dual (multi) base radar. Passive radar itself does not emit electromagnetic waves, but uses external radiation sources to detect and track targets, so it has good concealment and "four resistances" (anti-jamming, anti-low-altitude penetration, anti-radiation missiles, and anti-stealth) capabilities . In recent years, research on the use of mobile communication signals as sources of passive radar illumination has been in the ascendant. GSM signal, WiFi signal, WiMAX signal, UMTS signal and other mobile communication signals have been used as passive radar illumination sources for analysis. LTE is one of the latest mobile communication technologies, providing b...

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Problems solved by technology

[0006] Among these two target signal processing systems, the coherent system requires dual antennas to simultaneously receive the direct wave signal and the target echo, which not only increases the complexity of the system, but also reduces the processing accuracy because the direct wave signal is bound to be interfered by noise ; The accuracy of the non-coherent system will also be reduced because the direct wave signal is not reconstructed

[0007] There is no single-channel passive radar system based on communication / radar integration in the prior art

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