Distortion Metrics for Multiple-Input, Single-Output Systems in Terms of Nonlinear Polynomial Coefficients
Abstract
The Navy has an interest in fiber-optic beamforming systems. Such systems comprise multiple RF inputs and a single RF output but where the signal processing is performed almost entirely in the optical domain and thus takes advantage of all the benefits of the single-mode fiber optic technology including wide RF bandwidth and low RF loss. However, the theory of such multiple-input, single-output (MISO) photonic systems is not well developed. As a prelude to an analysis of photonic beamforming systems, in this report we develop the mathematical foundation for the analysis of an RF-only MISO system. We assume every nonlinear element in the array can be modeled by a third-order polynomial and a standard noise model. Since the analysis is based on the the more-fundamental power-series expansion rather than the distortion metrics of each element, this approach will have broad applicability to both purely-RF and photonic beamforming systems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 12, 2023
- Accession Number
- AD1190841
Entities
People
- Frank Bucholtz
- Joseph M. Singley
- Matthew J. Mondich
Organizations
- United States Naval Research Laboratory