Direct Sequence Ultra Wideband(DS- UWB) is a technique proposed by the UWB Forum for high-speed communications in Wireless PersonalArea Networks(WPAN). DS-UWB is a HS local radio technique that is intended to replace cable connections in the PC environment with wireless technology.
With DS-UWB, hard drives, scanners, printers, displays, and other peripherals up to camcorders can communicate with the personal computer at a high data transfer rate. The range of action is 10 m, the data rate provided by the UWB forum goes up to 1,32 Gbit/s.
According to the method, DS-UWB works with ultra-wideband pulse radio, in which the signal is distributed over an ultra-wide frequency band by means of spread-band technology, making it insensitive to narrow-band interfering signals. The transmitted pulses are keyed using biphase shift keying(BPSK) or bi- orthogonal keying (4-BOK). To allow the available frequency band to be used by multiple piconets in coexistence, the frequency band is divided into multiple channels. One frequency band is between 3.1 GHz and 4.9 GHz. This frequency band is divided into six channels with a maximum chip rate of 1.3 GigaChips/s (Gc/s). Another frequency band is between 6.2 GHz and 9.7 GHz. Six channels with 2.6 GigaChips/s can be transmitted in this frequency band.