PHASE ERROR ANALYSIS FOR AN ACTIVE ARRAY SYSTEM.
OHIO STATE UNIV RESEARCH FOUNDATION COLUMBUS ANTENNA LAB
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An active transmitting and receiving array operating at X-band using four 30-foot parabolic antennas is discussed. The active array system is designed to operate with both active and passive orbiting satellites as a target. Phasing information received from the target is used to control the phases of the transmitted signals such that they add coherently at the satellite. Thus the active array operates as a servo system with an inherent time delay equal to twice the propagation time delay from the satellite to the ground station. The optimum transfer function for the active array system, including the effects of this time delay, is determined for various input signals by using a Weiner-Hopf optimization technique. Performance of the system is evaluated for both deterministic and stochastic input signals. Various deterministic input signals are used to calculate the optimum transfer function. Then the mean square error MSE and integral square error ISE are evaluated for various combinations of deterministic inputs and transfer functions. Seven different power density spectra PDS are used to represent the stochastic input signals. Author
- Electrical and Electronic Equipment
- Radio Communications