超宽带技术

UWB technology

UWB是一种典型的无载波通信技术,它利用纳秒至微微秒级的窄脉冲传输数据,因此其所占的频谱范围在数GHz左右,带宽明显大于目前所有通信技术的带宽。超宽带适用于密集多径场所的短距离无线通信,有望为无线局域网和无线个人区域网接口的互联和接入带来低功耗的高速无线接入应用。

UWB is typically implemented in a carrierless fashion.UWB implementations can directly modulate an impulse that has a very sharp rise and fall time,thus resulting in a waveform that occupies several GHz of bandwidth.Clearly,this bandwidth is much greater than the bandwidth used by any current technology for communication.It has properties that make it a viable candidate for short- range communications in dense multipath environments.Due to recent developments in high- speed switching technology,UWB is becoming more attractive for low- cost consumer communications applications.One of the important considerations for the success of UWB systems is the compatibility and coexistence of such systems with other WLAN or WPAN.