Development of two ultra wideband sources: impulse radio and direct-sequence spread spectrum

摘要

In February 2002, the Federal Communications Commission (FCC) conditionally waived unlicensed operation of unlicensed of personal ultra wideband (UWB) products in the United States. The UWB technologies have been exploited to be able to use for super -high-speed communication, highly -accurate sensing and geolocation, low -cost RF tagging, and so forth; and to pioneer a new spectrum resource substantially. Research areas, however, remain to be fully studied such as UWB propagation characteristics and interference effects from the UWB wireless systems to conventional narrow -band ones sharing the same frequency bands. No netheless, UWB sources have not been readily available for the experimented studies. This paper reports prototypes of impulse radio and direct sequence spread spectrum (DS - SS) UWB sources to serve for propagation, electromagnetic compatibility and other experimental studies.