Digital LPI Radar Detector
Ong, Peng Ghee
Teng, Haw Kiad
MetadataShow full item record
The function of a Low Probability ofIntercept (LPI) radar is to prevent its interception by an Electronic Support (ES) receiver. This objective is generally achieved through the use of a radar waveform that is mismatched to those waveforms for which an ES receiver is tuned. This allows the radar to achieve a processing gain, with respect to the ES receiver, that is equal to the time-bandwidth product ofthe radar waveform. This processing gain allows the LPI radar to overcome the range-squared advantage ofthe ES receiver in conventional situations. Consequently, a conventional ES receiver can only detect an LPI radar at very short ranges (<3 nm). The focus of this thesis was to develop an ES receiver to detect LPI radar signals with the same sensitivity as conventional pulse signals. It implements a detector which employs a technique, known as "deramping," that forms an adaptive matched filter to the linear FMCW LPI radar signal in order to achieve the processing gain that is equal to the received signal's time-bandwidth product. An experimental transmitter was built to emulate the radar signal with FMCW characteristics and transmitted through a standard gain horn. The transmitted signal is then received via a receiver horn, mixed down to an intermediate frequency (IF), sampled by an A/D convenor and digitally deramped using a Pentium II computer. It was demonstrated that the LPI radar signal can be extracted from the noise background by means of digital deramping
Approved for public release; distribution is unlimited
Showing items related by title, author, creator and subject.
Performance of FFH/BFSK systems with convolutional coding and soft decision Viterbi decoding over Rician fading channels with partial-band noise interference [electronic resource] Theodoss, Michael D. (Monterey, California. Naval Postgraduate School, 1995-12);An error probability analysis of a communications link employing convolutional coding with soft decision viterbi decoding implemented on a fast frequency hopped, binary frequency shift keying (FFH(BFSK) spread spectrum ...
Dessalermos, Spyridon. (Monterey, California. Naval Postgraduate School, 2011-06);This research concerns the development of an adaptive receiver for underwater communication. In this type of wireless link, the radio channel is replaced by an underwater acoustic channel, which is strongly dependent on ...
Performance analysis of the IEEE 802.11G waveform transmitted over a fading channel with pulse-noise interference Taxeidis, Konstantinos (Monterey California. Naval Postgraduate School, 2006-06);The performance of the most promising wireless local area network (WLAN) standards today, IEEE 802.11g, which specifies orthogonal frequency-division multiplexing in order to avoid multi-path effects and at the same time ...