00000cab a22000003a 4500 UP-99796217608899924 Buklod 20231007234006.0 m |o d | ta 090630s xx d | ||r ||||| || DENGII eng Falconer, D.D. Coverage enhancement methods for LMDS. pp. 86-92 The upper SHF and EHF radio bands (above about 20 GHz) offer abundant available bandwidth for access to metropolitan area networks by fixed broadband wireless access (FBWA) systems. However, these systems must withstand significant propagation impairments, especially shadowing by obstacles and rainfall attenuation. We describe the results of propagation measurements and modeling of coverage, and consequences for FBWA system design, notably antenna placement, use of repeaters, and diversity. High (> 90 percent) coverage generally requires line-of-sight placement, although some non-line-of-sight coverage is possible for short distance and with judicious use of repeaters and macrodiversity. EHF radio band. FBWA system design. LMDS. MAN. NLOS coverage. SHF radio bands. Antenna placement. Attenuation. modeling. Bandwidth. Coverage enhancement methods. Diversity reception. Fixed broadband wireless access systems. Line-of-sight placement. Macrodiversity. Metropolitan area networks. Nonline-of-sight coverage. Propagation impairments. Propagation measurements. Rainfall attenuation. Repeaters. Shadowing. Short distance. IEEE Communications magazine 41, 7 (2003). FO UPD DENG-II Article