Unformatted text preview: frequencies, propagation is mostly line-of-sight.
microwave transmission between tall towers.
Use of electromagnetic spectrum is highly regulated
Also power limits. The cellular concept in mobile
communication Within a cell,
the assigned frequency band is divided among
The division can be frequency multiplexing
or time multiplexing, or a combination of both.
Alternatively, CDMA (Code Division
Multiple Access) can be used in a cell. Direct Sequence CDMA with L or m= 10 pulses (chips) per bit.
simultaneously without coordination, with little interference. Ideally, code...
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- Fall '08
- Local area network, Coaxial cable, thermal noise, layered architecture, limited frequency bandwidth