# In discussing thermal noise at the beginning of this chapter, we stated that at standard temperature (290 K) the white-noise assumption is valid to bandwidths exceeding 1000 GHz. If the temperature is reduced to 5 K, the variance of the noise is reduced, but the bandwidth over which the white-noise assumption is valid is reduced to approximately 10 GHz. Express

Chapter 8, Problem #1

In discussing thermal noise at the beginning of this chapter, we stated that at standard temperature (290 K) the white-noise assumption is valid to bandwidths exceeding 1000 GHz. If the temperature is reduced to 5 K, the variance of the noise is reduced, but the bandwidth over which the white-noise assumption is valid is reduced to approximately 10 GHz. Express both of these reference temperatures (5 and 290 K) in degrees fahrenheit.

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**Related Book For**

## Principles of Communications Systems, Modulation and Noise

7th edition

Authors: Rodger E. Ziemer, William H. Tranter

ISBN: 978-8126556793