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Extra resources for 10.Communications
Therefore, the taller the antennas, the less power they are allowed to transmit. There is a tradeoff between the coverage of and the amount of interference emitted by a certain base station. The antenna height must be designed to reduce the amount of interference to the neighboring base stations. IS-95 This subsection deals with the receiver issues for IS-95 systems. The following FCC requirements are extracted from Refs. 19–21). Power Characteristics for Base Station and the Mobile. The FCC also regulates spurious emissions outside the band of interest to minimize adjacent channel interference.
Nevertheless, the customer did not care about that. What was once a good, reliable service became a poor service. So, the customer stopped the current service and switched to the service offered by the new provider. It is important to note that this customer is not the only individual who experienced lost calls in this example. Indeed, each customer who commutes into Albany from the north will experience the same problem and become dissatisfied with the existing service. The example shows that adjacent channel interference from other service providers’ base stations will create coverage holes in a given network.
Then with a frequency reuse of , the provider can assign the same channel to every seventh cell. Thus, the provider assigns three channels to each cell. If we assume that no channels are used for signaling or control purposes, this wireless system can support a capacity of 126. 03 dB). Then a cluster size of three will provide sufficient protection from cochannel interference. This results in an increased frequency reuse factor of and an increase in capacity that exceeds a factor of 2. Indeed, in this example, with an increased frequency reuse of , the provider can assign each cell seven channels rather than three.