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Maximum Amount of Channels A Link Can Carry

A microwave radio link operates over a bandwidth of 400 MHz at C band. The link carries a number of channels of data using FDMA. Each channel has an RF bandwidth of 36 MHz and 4 MHz guard bands are needed between channels.

a. What is the maximum number of channels that the link can carry?

b. If half rate error correction coding is applied to the 100 kbps bit stream in part (c) above before transmission over the microwave link, how many voice channels can be carried by one RF channel?

Solution Preview

a. A microwave radio link operates over a bandwidth of 400 MHz at C band. The link carries a number of channels of data using FDMA. Each channel has an RF bandwidth of 36 MHz and 4 MHz guard bands are needed between channels. What is the maximum number of channels that the link can carry?

Each channel occupies a frequency space of f_channel given by the sum of the channel bandwidth f_BW = 36MHz and the guard band frequency space f_GB = 4MHz so we can write

The number of channels N_channel in the allocated C Band bandwidth is ...

Solution Summary

The maximum amount of channels a link can carry are determined in the solution.

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