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External impulsive interference (IMI) will severely degrade the performance of an Over-the-horizon radar (OTHR), and detection and suppression of IMI in strong clutter environment is the prerequisite for the target detection. This paper proposes a novel method based on the signal subspace properties, aiming at effectively detecting IMI with easy or without clutter suppression. Selective survey on...
Backscatter signal from OTHR receiver may contain strong noise and interference background, among which the meteor echo is a typical and strong Impulsive interference. This meteor echo may inject transient but great power into the receiver, arise the noise floor in the range-Doppler map and decrease SNR. So it must be suppressed before target tracking. Many solutions are presented for meteor echo...
Some radio equipments work in high-frequency of 3 MHz-30 MHz to detect target. In this band, the real data has indicated that there is obvious meteor trail interference. The interference has adverse effect on the range and Doppler information detection of the target which may lead to these equipments not working normally. Based on the scatter feature of meteor trail, combined with such signal processing...
This paper combines time-reversal space-time block coding (TR-STBC) which is for frequency-selective channel, with orthogonal frequency multiplexing (OFDM) to derive a new MIMO-OFDM system. Compared with the system which adopts STBC proposed by Alamouti, this one adopting TR-STBC exchanges the positions of OFDM modulator/demodulator and Space-time coder/decoder to reduce the computation complexity...
This paper derives a new MIMO-OFDM system. This system adopts time-reversal space-time block coding (TR-STBC) to replace STBC proposed by Alamouti. When TR-STBC is combined with orthogonal frequency multiplexing (OFDM), the computation complexity is lower than other MIMO-OFDM schemes. Through simulation, this scheme has better performance than the one which adopts STBC proposed by Alamouti and it...
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