Figure 28 Microwave Signal with Multiple Reflections

Rerleated Sign als p and 2foNow sligjhtly longer fraahs ahan the direct signal; therefore, they arrive slightly later than the direct signal. These reflected echoes sometimes cause problems at the receiver by partially canceling the direct signal, effectively reducing its amplitude. The link throughput slowe down be^une the receivdr needs minde time to either separate the real signal from the reflected echoes or to wait for missed packets to be retransmitted. Multipath is a significant ptoWe m for desigeers of1 microwa ve netwonks. Methods that you can use to minimize the effects of multipath are discussed later in the book.

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