Design and Performance of Carrier-Based DS-SS Systems on IEEE 802.15.3a UWB Channels

A set of physical layer specifications is provided for a single-band and a dual-band UWB system. Both systems fulfill the FCC regulations on UWB devices. Only the singleband system fulfills the physical layer requirements from IEEE 802.15.3a. The single-band system gives reliable communication, i.e., a 90th-percentile PER equal to 8% for 1024 payload bytes, at 110 Mbps with a transmitter–receiver separation of up to 10 meters on the IEEE 802.15.3a channel model CM4. 205 Mbps at 6.7 meters on CM4 and 513 Mbps at 3.8 meters on CM2 are also achieved. The single-band system uses the spectrum 3.1–4.9 GHz, a chip-spaced rake combiner with 60 fingers, a sliding window channel estimator, and a sampling rate of 1540 Msamples/s. The dual-band system uses two bands, 3.1–4.0 GHz and 4.0– 4.9 GHz. The system has a chip rate of 770 Mchip/s and the same sampling rate of 1540 Msamples/s. It uses a fractionally spaced rake combiner. The system provides 10.2 and 8.5 meters on CM3 and CM4, respectively, in the lower 3.1–4.0 GHz band when combining all available multipath components that have been perfectly estimated.