The Effect of Polarization Diversity on Receiving Systems.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OHIO SCHOOL OF ENGINEERING
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The use of polarization diversity process requires the derivation of a mathematical system model to allow evaluating the effects of this process, employed by a jammer or by a threatened radar, upon jamming effectiveness. The system model consists of two orthogonal linear antennas controlled by a random process in amplitude and phase. The expected value of the received power due to interference is related to the autocorrelation of the received signal. The received power is obtained in the frequency domain from the spectral behavior of the total polarization diversity processes employed by both the jammer and radar and the spectral characteristics of the transmitting and receiving systems. The spectral behavior of the total polarization diversity process if constructed by the convolution between the polarization diversity processes of both the jammer and radar. The spectrum of the polarization diversity is spread in a convolution manner by the transmitter spectrum. This convolved spectrum contributes to the expected value of the received power only within the bandwidth of the receiving system. It is concluded that for several typical scenarios polarization diversity is an effective jamming technique. Author
- Radar Countermeasures
- Active and Passive Radar Detection and Equipment