
Multipath Delay Spread
Simulcast Networks Aside, the Signal at the Antenna is Really
Multiple Reflected Signals with Random Delays
– Extent of problem varies with topography
Delay Spread Causes Bit Errors Even When Signal is Strong
– Weak correlation with signal strength remains
– Line-of-sight paths tend to have lower delay spread
Unlike Simulcast, the Delay Profile is Time-Varying
– Adaptive equalizers are effective tool
– No guarantee manufacturer is using one, however
I.e., Performance is Implementation-Dependent
– And it is unlikely that the mfr. has tested for all possible
environments
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