Abstract—This paper describes the external noise jamming of monopulse radar receiver when White Gaussian Noise (WGN) and Phase Noise (PN) signals are injected into the receiver. Initially, it is assumed that the receiver is locked onto the desired radar echo signal frequency in the presence of external noise signal as the noise power is too less to break the frequency lock of the receiver. It is shown that the Gaussian noise power required for jamming the receiver depends upon how the power is interpreted. In this paper, the Gaussian noise power is interpreted in symbol rate bandwidth, sampling frequency bandwidth, in single-sided and double-sided power spectral density. In the case of phase noise jamming, the phase noise mask (dBc/Hz) required for break-lock in the receiver is studied. It is verified that phase noise power required for jamming the receiver is less when frequency offset from the radar echo signal is large. The simulation result shows that phase noise mask of -72 is required when the frequency offset from the echo signal is 10 MHz. The effectiveness of external noise jamming is carried out through computer simulation using AWR (Visual System Simulator) software.
Index Terms—Gaussian noise, monopulse receiver, noise jamming, phase noise, power spectral density.
Hari Krishna Paik is with the Department of EIE in V. R. S. Engg.
College, Kakinada, India (e-mail: pavan_paik2003@yahoo.co.in)
N. N. Sastry is with the R&D Wing in V. R. S. Engg. College, Vijayawada, India
I. Santi Prabha is with the Department of ECE and also is with the Empowerment of Women & Grievances in JNTU, Kakinada, India
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Cite: Hari Krishna Paik, N. N. Sastry, and I. Santi Prabha, "Effectiveness of External Noise Jamming in Missile Borne Monopulse Radar Receivers," International Journal of Engineering and Technology vol. 6, no. 4, pp. 269-272, 2014.
