Spectrum sharing between FDM/FM and radar systems using pulse blanking
Abstract
The results of an analysis to evaluate the effects of radar pulse interference on an FDM/FM carrier are presented. It is shown that in general it is difficult to develop simple analytic expressions to quantify the degree of interference. It is noted that when the radar peak power is much greater than the FDM/FM carrier power, the interfering signal effectively blanks the output of an FM demodulator when the carrier frequencies are equal. When the frequencies are not equal, the demodulator output consists of interfering pulses with amplitudes related to the frequency difference between the two carriers. Here, intentional blanking of the demodulator output can reduce the degree of interference. It is concluded that when the ratio of the peak radar power to the mean carrier power is large and the radar duty factor is low, pulse blanking appears to be a means to enhance spectrum sharing.
- Publication:
-
NTC 1979; National Telecommunications Conference, Volume 2
- Pub Date:
- 1979
- Bibcode:
- 1979ntc.....2...22B
- Keywords:
-
- Channel Noise;
- Frequency Division Multiplexing;
- Frequency Modulation;
- Pulse Radar;
- Radio Frequency Interference;
- Synchronism;
- Carrier Frequencies;
- Collocation;
- Signal To Noise Ratios;
- Voice Communication;
- Communications and Radar