基于PSRP-CDMA的扩频Ad Hoc网络性能  

Performance of spread spectrum Ad Hoc network based on PSRP- CDMA

作　　者：杜传报[1] 全厚德[1] 

机构地区：[1]军械工程学院信息工程系,河北石家庄050003

出　　处：《电子技术应用》2015年第1期82-85,共4页Application of Electronic Technique

基　　金：国家自然科学基金(U1035002/L05);国家无线重大专项(2014ZX03003001-002)

摘　　要：分段时隙预约分组的码分多址接入(Partitioned Slotted Reservation Packet CDMA,PSRP-CDMA)协议是一种可以提供分组级信道、无协商使用信道的码分多址接入协议,此协议的分组格式由分组头和分组负荷组成,分组头通过时分多址机制接入信道,分组负荷通过码分多址机制接入信道。在考虑簇内多址干扰的基础上,给出了基于PSRP-CDMA的时隙扩频Ad Hoc网络理论分析模型,推导出了分组传输成功概率,得到了系统吞吐量和传输时延的表达式。分析了扩频增益、接收信号信噪比和网络负载等对网络性能的影响。数值结果表明,与基于竞争机制RP-CDMA的扩频Ad Hoc网络相比,PSRP-CDMA的归一化网络吞吐量能够提高25%。Partitioned Slotted Reservation Packet-Code Division Multiple Access is a MAC protocol which can provide packet level private channel without coordination, the packet format of which consists of packet header and payload. Packet header is ac- cessed to channel by TDMA, and payload is accessed to channel by CDMA. In this paper, we present the performance evaluation analytical model of slotted spread spectrum Ad Hoc networks with PSRP-CDMA as MAC protocol by taking into account intra- cluster multi-access interference. The model provides packet success probability and expressions of network throughput and delay. Based on these expressions, the network performance is affected by these factors, such as spreading gain, received signal noise ratios and network load. Numerical results show that, the normalized network throughput of PSRP-CDMA outperforms competition RP- CDMA by 25%.

关 键 词：扩频Ad HOC网络 码分多址接入 多用户检测器 网络吞吐量 

分 类 号：TN929.5[电子电信—通信与信息系统]