Wavelet-based Ultra Wide Band communications rely on receiver collecting data simultaneously from many transmitters and without interference thanks to the orthogonality between primitive wavelet packets. Nevertheless, there is a particular case for which the communication fails. Indeed, the time-shift between primitive wavelet packets results in a loss of the orthogonality of these wavelet packets. This paper proposes an asynchronous Impulse Radio-Ultra Wide Band (IR-UWB) transmission suitable in Wireless Sensor networks without any distinction between the transmitters. The originality of the proposed solution is to ensure a time-shift immunity of IR-UWB receivers by finding the unique combination of shifted primitive packets. For this purpose, finding the one zero result of successive subtractions between received and primitive packets is performed. Considering a given wavelet, the proposed solution is able to decode the shifted-mixed primitive packets from multiple transmitters whatever the time-shift between each packets.

基于小波的超宽带通信依赖于接收器同时从许多发送器收集数据，并且由于原始小波包之间的正交性而没有干扰。但是，在特定情况下，通信失败。实际上，原始小波包之间的时移导致这些小波包的正交性损失。本文提出了一种适用于无线传感器网络的异步脉冲无线电超宽带（IR-UWB）传输，无需在发射机之间进行任何区分。所提出的解决方案的独创性是通过找到已移位原始数据包的唯一组合来确保IR-UWB接收器的时移抗扰性。以此目的，查找接收到的数据包与原始数据包之间连续相减的零结果。考虑到给定的小波，无论每个数据包之间的时移如何，所提出的解决方案都能够解码来自多个发射机的混合后的原始数据包。