Product Info

System Description WipLL Radio Technology - Physical Layer
25030311-08 Airspan Networks Inc. 2-23
Parameter Value
• ± 4 MHz
• ± 5 MHz
• 58 dB (60 dB)
• 63 dB (64 dB)
Receiver Noise Figure 10 dB
2.6.2. System Coverage
System coverage includes the following:
 Line of sight (LOS)
 Link Budget
2.6.2.1. Line of Sight
Usually, WipLL requires the existence of a line of sight (LOS) between the base
station transmitter and the subscriber’s receiver (near line of sight [NLOS] may be
possible to a limited extent for ranges of a few hundred meters). Therefore, the
availability of LOS (clear first Fresnel Zone) should be estimated during CPE
installation or preferably during network planning. Recommended propagation
models used in coverage analysis are based on free-space propagation with
compensation for ground and irregular terrain reflections and diffraction. Specific
propagation model names vary between different software tools. The model should
also include a certain level of fade margin, as discussed in the next section.