应用文章
This application note is intended for engineers that need an overall understanding of the basic RF characteristics of the 256 carrier OFDM air interface defined in 802.16-2004 and the specific RF parametric measurement techniques that can be performed with Keysight Technologies, Inc. test solutions. The 802.16-2004 standard describes four different air interfaces. One of these interfaces is optimized for non-line-of-sight, RF frequencies < 11 GHz, and distances up to 30 km. Although the standard has officially named this PHY layer as WirelessMAN-OFDM, many people refer to this as the WiMAX™ air interface. The basic characteristics of the air interface are 256 carrier OFDM, bandwidths that range from 1.25 MHz to 20 MHz, and carrier frequencies up to 11 GHz.
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