Product Info
System Description WipLL Radio Technology - Physical Layer
25030311-08 Airspan Networks Inc. 2-5
FSK provides the following benefits:
Non-coherent detection is possible - no carrier synchronization is required.
Immunities to non-linearity - the envelope contains no information and,
therefore, can be hard-limited; information is carried by zero crossings:
Can be used with non-linear power amplifiers
Better efficiency
The FSK phase can be discontinuous or continuous, as displayed in Figure 2-4.
Figure 2-4: FSK phase: discontinuous (left wave); continuous (right wave)
Continuous wave is more natural than discontinuous and provides the following
advantages:
Smaller bandwidth (discontinuous wave causes high frequency components)
Operates better when transmission link has non-linearities