C-UWB is an acronym for continuous pulse

ultra-wideband Ultra-wideband (UWB, ultra wideband, ultra-wide band and ultraband) is a radio technology that can use a very low energy level for short-range, high-bandwidth communications over a large portion of the radio spectrum. UWB has traditional applicati ...

(UWB) technology. C-UWB derives its bandwidth by virtue of the short time duration of the individual pulses. Information can be imparted (modulated) on UWB signals (pulses) by encoding the polarity of the pulse, the amplitude of the pulse, or by using orthogonal pulse shape modulation. Polarity modulation is analogous to

BPSK Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at ...

in conventional RF technology. In orthogonal wave shape modulation, two orthogonal UWB pulse shapes are employed. These are further polarity modulated in a fashion analogous to

QPSK Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency reference signal (the carrier wave). The modulation is accomplished by varying the sine and cosine inputs at ...

in conventional radio technology. Preferably, the modulating data bits are scrambled or "whitened" to randomize the occurrences of ones and zeros. The pulses are sent contiguously as a continuous stream, hence the bit rate can equal the pulse rate. C-UWB systems were demonstrated in 2008 at channel pulse rates in excess of 1.3 giga-pulses per second, supporting forward error correction encoded data rates in excess of 675 Mbit/s. Continuous pulse UWB technology was the basis of one of the physical layers specified by the IEEE 802.15.4a standard.

References

Data transmission {{wireless-stub da:UWB de:Ultrabreitband es:Ultrawideband fr:Ultra wideband it:Ultra wideband he:תחום רחב סרט nl:Ultra-wideband ja:超広帯域無線 pl:Ultra wideband pt:UWB ru:UWB fi:UWB sv:Ultra Wideband zh:超寬頻