Tower-top amplifiers and noise figure (Part 2 of 2)

Published Thursday, September 01, 2005

Part 2 of 2 Last month in Tech Speak, we introduced the concept of noise figure and calculated the noise figure improvement created by a tower-top amplifier in a system limited by receiver thermal noise. This month, we examine the case where a tower-top amplifier must operate in the presence of external interference as well as thermal noise. Let's consider the same hypothetical example as last month: a five-channel 800 MHz trunked radio system operating in the NPSPAC band (821 MHz to 824 MHz, 866 MHz to 869 MHz). The receive antenna is located on a tower 350 ...

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Tower-top amplifiers and noise figure (Part 2 of 2)

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