In the past decade, cellular communications have experienced an explosive growth due to recent technological advances in cellular networks and cellular telephone manufacturing. Early schemes for radio telephones schemes used a single central transmitter to cover a wide area. These radio telephone systems suffered from the limited number of channels that were available. The need for a spectrum efficient system: To illustrate the need for efficient spectrum usage for a radio communications system, take the example where each user is allocated a channel. Each channel needs to have a bandwidth…
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