The effect of a pulsed interference signal on an adaptive array
Abstract
The performance of a least mean square (LMS) adaptive array in the presence of a pulsed interference signal is examined. It is shown that a pulsed interference signal has two effects: (1) it causes the array to modulate the desired signal envelope (but not its phase); and (2) it causes the array output signal-to-interference-plus-noise ratio (SINR) to vary with time. The desired signal modulation is evaluated as a function of signal arrival angles, powers, and interference pulse-repetition frequency (PRF) as well as pulsewidth. It is shown that the signal modulation is small except when the interference arrives close to the desired signal. To evaluate the effect of the time-varying SINR, it is assumed that the array is used in a differential phase-shift keyed (DPSK) communication system. It is shown that the SINR variation causes a noticeable but not disastrous increase in the bit error probability.
- Publication:
-
IEEE Transactions on Aerospace Electronic Systems
- Pub Date:
- May 1982
- DOI:
- 10.1109/TAES.1982.313321
- Bibcode:
- 1982ITAES..18..297C
- Keywords:
-
- Adaptive Control;
- Communication Equipment;
- Electromagnetic Interference;
- Pulse Communication;
- Signal Analysis;
- Signal To Noise Ratios;
- Phase Shift Keying;
- Power Spectra;
- Pulse Duration;
- Waveforms;
- Communications and Radar