Technologies on the horizon
A combination of technology developments will be needed to meet the growing demand for electromagnet spectrum. Here are some of the developments by industry and other government entities that Defense Information Systems Agency and the Defense Spectrum Organization continue to monitor and explore:
- ADVANCED RADIO SYSTEMS ' Radio systems, including software-defined and cognitive radios, that can automatically adapt to different spectrum environments by changing frequencies, power levels and other operational characteristics.
- CHANNEL CAPACITY IMPROVEMENT TECHNOLOGIES ' These use advanced modulation and coding techniques to increase channel utilization, squeezing more data over existing amounts of spectrum.
- MODELING AND SIMULATION ' Efforts to optimize methods to model and test the next generation of spectrum-dependent systems with improved capabilities.
- MULTI-DIMENSIONAL SPECTRUMSHARING TECHNOLOGIES ' They optimize reuse of spectrum by looking at factors such as time, frequency, signal coding and geographic space.
- NETWORKING TECHNOLOGIES' Seeking greater spectrum efficiency by improvements across Open Systems Interconnection layers, from the network layer through the link layer and down to the physical layer, such as radios.
- MICROWAVE AND FREE-SPACE OPTICAL TECHNOLOGIES' Exploring the use of higher-frequency bands, from 30-300 GHz, and free-space (unwired) optics to relieve congestion in the lower radio frequency bands, below 6 GHz.
- WIRELESS/MOBILE SYSTEMS' Exploring commercial wireless technologies, such as WiMax or broadband mobile, for military applications.