Citation
Abstract
Chirped signals are well known in the context of bandwidth-efficient highresolution radar, but their ability to provide accurate phase and delay calibration of antenna arrays has not been previously explored. Here we consider using chirped pulses to calibrate phased antenna arrays, for both transmit and receive applications. Array calibration requires the estimation of carrier phase and group delay, information that is inherently contained in a chirped signal pulse. In this article, we examine this new calibration capability by developing the structure of the maximum likelihood estimator, and simulating its performance over a wide range of signal-to-noise rations (SNRs). The simulation results are compared to Cramer-Rao lower bounds on the variance of estimation error, for both individual and joint estimation of delay and phase. It is shown that chirped signals have the capability to provide accurate estimates of delay and phase with SNRs and integration times typically encountered in operational phased array applications.
Details
- Volume
- 42-215
- Published
- November 15, 2018
- Pages
- 1–17
- File Size
- 8.5 MB