Abstract
With easy-to-be-disposed architecture and premium navigation performances, polar-coordinate navigationsystem (PCNS) is still widely utilized by modern military navigation systems. Unfortunately, PCNS has very poor electronic counter-counter measures (ECCM) performances, due to the lack of electronic warfare (EW) considerations during its initial system design. To solve this problem, an improved PCNS (Imp-PCNS) is proposed in this paper to introduce ECCM capabilities to PCNS. The low probability of intercept (LPI) waveforms are utilized instead of regular pulses to reduce the probability of hostile interception. Both the bandwidth and the transmitted power of LPI are designed to generate the signals submerged under the thermal noises at the front ends of enemy receivers. Finally, a kinematic bearing method is proposed to dramatically reduce the possibility of intercept. The principle of kinematic bearing is analyzed in detail. An undistorted observed geometric position (OGP), which is independent ofthe deviation of observing angle, is achieved by controlling the rotation of the antenna array of PCNS beacon. Defence Science Journal, 2013, 63(1), pp.114 -118 , DOI:http://dx.doi.org/10.14429/dsj. 63.2519
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