TAILIEUCHUNG - Capacity of Wireless Channels

So far we have only looked at specific communication schemes. Information theory provides a fundamental limit to (coded) performance. It succinctly identifies the impact of channel resources on performance as well as suggests new and cool ways to communicate over the wireless channel. It provides the basis for the modern development of wireless communication. | 5. Capacity of Wireless Channels Information Theory So far we have only looked at specific communication schemes. Information theory provides a fundamental limit to (coded) performance. It succinctly identifies the impact of channel resources on performance as well as suggests new and cool ways to communicate over the wireless channel. It provides the basis for the modern development of wireless communication. Historical Perspective Wireless communication has been around since 1900’s. Ingenious but somewhat adhoc design techniques Claude Shannon Gugliemo Marconi Information theory says every channel has a capacity. Many recent advances based on understanding wireless channel capacity. New points of views arise. 1901 1948 Multipath Fading: A Modern View Classical view: fading channels are unreliable Modern view: multipath fading can be exploited to increase spectral efficiency. 16dB Capacity of AWGN Channel Capacity of AWGN channel If average transmit power constraint .

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