DSC-UWB uses _________(a) Pulse width modulation(b) Pulse code modulation(c) Pulse position modulation(d) Direct sequence modulationThis 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

DSC-UWB uses _________(a) Pulse width modulation(b) Pulse code modulat

1.	DSC-UWB uses _________(a) Pulse width modulation(b) Pulse code modulation(c) Pulse position modulation(d) Direct sequence modulationThis 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
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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