?– Long-haul application RF signals have limited range of propagation, especially
in dense urban environment. WiMAX is no exception to this rule. Therefore,
it does not fit in scenarios demanding long-haul data transmission.
?– Indoor applications WiMAX was designed for outdoor applications and is
not well suited for indoor applications, either due to regulatory or technical
limitations.
Benefits and Shortcomings
Throughout this chapter, much of the material have been focused on key features of
WiMAX, which no doubt form the basis of some of the key benefits of the technology, In
this section, we revisit those benefits, both technical and non-technical, as well discuss
what may be considered some of the shortcomings of the technology.
Technical Benefits
As has been discussed throughout this chapter, WiMAX provides several technical features
that are highly desirable.
?– Adaptive channel robustness versus throughput In all communications
systems with a given bandwidth, there is always a tradeoff between robustness
and throughput. One of the key benefits of the WiMAX standard is its use of adaptive
encoding and modulation techniques that allow it to dynamically increase
robustness at the expense of throughput or increase throughput at the expense
492 Chapter 15
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