UWB环形网的传输性能分析

具有很大带宽的超宽带（UWB）技术可组成高容量的个人区域网。该技术无线链路的某些特性可有效提高UWB网络的性能，且这些特性是其他无线技术所不具备的，如精确定位、较长的同步时间和通过选择不同长度的伪随机码来实现不同传送速率的能力。利用这些特性提出并组建了UWB环形网，推导出网络传送延迟的表达式，并利用队列理论和拉格朗日函数求出最小延迟时的最大网络容量。

The Performance Analysis of The UWB Network with A Ring Topology

Ultra-wideband （UWB） may provide a high capacity personal area networks that uses a very large bandwidth. Certain characteristics of the wireless links using this technology may efficiently improve the performance of the UWB network, which are not seen with other wireless technology. Such properties are precise positioning, the long synchronization times and the ability to change individual link capacities by choosing PN codes of different length, a novel UWB network with a ring topology using the properties is formulated. Base on this, an expression specifying average network transit delay is derived, and the queuing theory delay equations and the Lagrangian function are used to find maxim link capacities under the condition of minimizing the delay.