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Ultra-Wideband Communications: Fundamentals and Applications by Faranak Nekoogar

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1.7. Differences Between UWB and Spread Spectrum

Although UWB is a growing technology and more information on its concepts and capabilities becomes available every day, many misconceptions are associated with its name. A good number of people confuse UWB communications with wideband spread-spectrum techniques. Even though both UWB and spread-spectrum techniques have their origins in military secure communications, we need to clarify a fundamental difference between the two. For this reason, it is important to briefly review two commonly used spread-spectrum techniques—DSSS and FHSS.

1.7.1. Direct-Sequence Spread Spectrum

In direct-sequence spread spectrum (DSSS), a pseudorandom code is used to spread each data bit with a large number of chips, ...

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