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DSC-UWB uses _________

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DSC-UWB uses _________

(a) Pulse width modulation

(b) Pulse code modulation

(c) Pulse position modulation

(d) Direct sequence modulation

This question was posed to me by my college director while I was bunking the class.

My question is taken from Ultra-Wideband Technologies topic in chapter Satellite Systems & Recent Advances of Wireless/Mobile

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Best answer
Right choice is (d) Direct sequence modulation

For explanation: In DSC-UWB, the signal is spread by direct sequence modulating a wavelet pulse trains at duty cycles approaching that of a sine wave carrier. The spectrum spreading, channelization, and modulation are provided by a PN (pseudo noise) sequence, and the chipping rate is maintained as some fraction of the carrier center frequency.

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