Dynamic Spectrum Access Decisions

Chapter 9Overview

This chapter introduces the frequency spectrum, provides an overview of spectrum management operations, and describes the core functions related to spectrum management operations within the context of Army operations. This chapter also provides an overview of spectrum management operations task.

9.1 Electromagnetic Spectrum

9.1. The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. Multiple radiated signals coexist in the same physical space and selectively detected using the appropriate equipment and channel. The spectrum extends from below the frequencies used for radio (at the long‐wavelength end) through gamma radiation (at the short‐wavelength end). Divided into alphabetically designated bands for specific wavelengths and frequency ranges, the spectrum encompasses wavelengths from thousands of kilometers to a fraction of an atom. Radio signals are able to coexist in the same physical space. Radio frequency spectrum is the continuum of frequencies of electromagnetic radiation from 3,000 Hertz (Hz) or 3 kilohertz (kHz) to 300 gigahertz (GHz). Isolation of multiple users of spectrum is possible by allocating different bands of this continuum to them.

Note. See Appendix C for an overview of spectrum physics.

9.1.1 Constrained Environment

9.2. Gaining and maintaining control of the electromagnetic spectrum is a critical requirement for the commander. From communications, to intelligence ...