中文摘要：

提出了一种同步DS-CDMA无线Ad Hoc网络中的有效用户识别方法，采用跨层设计，将MAC层SEEDEX协议中的调度信息用于物理层的帧编码和用户识别．接收机首先判断是否存在有效用户，如存在则使用当前时隙所有可能发送数据的节点的扩频码来确定有效用户，不存在则直接丢弃该数据帧，从而减少了接收机的能量消耗．仿真结果表明，该方法同现存的同类算法比较，减小了运算量，节省了接收机能量，改善了接收机错判概率．

英文摘要：

A new virtual user identification method in synchronized DS-CDMA wireless Ad Hoc networks is proposed, which uses the schedule information in SEEDEX protocol in MAC layer according to cross-layer design. The receiver detects whether there are virtual users. The virtual users will be identified by the spreading code of all the nodes which are possibly transmitting packets at the time slot if there are virtual users. Otherwise the data frame will be dropped. By using this method the calculation amount is reduced, the energy of the receiver is saved, and the error rate of the receiver is reduced.