关键词：传感器；频谱分配；无线电架构；无线电频谱
摘 要：Spectral allocation is critical for any radio architecture. A radio working within a given slice of spectrum has to cope with unwanted but co-existing interferers. These interferers can severely limit performance. To enable efficient and effective utilization of spectral resources government agencies across the world regulate the use of spectrum domestically and internationally. In the US, the Federal Communications Commission (FCC) designates different frequency bands for different applications while limiting radiation characteristics of radios operating in a specific band. While various commercial wireless communication systems such as GSM, CDMA etc. work on a licensed spectrum, FCC also provides various unlicensed spectral-bands, where one can transmit legally by simply complying with the radiation emission mask. Since cost of operation is an important factor for wireless sensor network deployment, operating radios in the unlicensed band is also desired. In this chapter, we specifically look at the FCC's UWB spectral mask, and provide an example of a multi-band radio that operates in compliance with the spectral mask constraints placed by the FCC.