一种基于定向天线的自组网多址接入协议

文中提出一种基于定向天线的自组织网多址接入协议DA-STDMA。该协议利用方向性天线定向波束增益特性,保证在高速可靠传输条件下,提升系统的容量,同时可以防止信息截获,提升系统的抗干扰性能。经过理论计算,DA-STDMA协议在信道利用率上与采用全向天线相比有显著提高。文中建立了DA-STDMA协议仿真模型,通过对比空间复用度、网络吞吐量等系统性能,DA-STDMA协议利用定向天线比全向天线性能有明显提升。同时仿真研究也表明,定向天线的定位算法对整个系统建链的收敛时间产生一定影响。

Ad-Hoc Network Multi-Acccess Protocol based on Directional Antenna

The DA-STDMA (directional antenna based space time division access) protocol is proposed. DA-STDMA protocol, by employing directional antenna with stronger signal transmission gain, can ensure high-rate and reliable transmission condition,improve system capability, prevent information interception and enhance the anti-inteference performance of the system. Theoretical analysis indicates that, the channel utility rate of directional antenna enjoys an obvious increase as compared with that of omni-directional antenna. Simulation model on DA-STDMA protocol is constructed,and the comparison of system performance, such as space reuse rate and network throughput, indicates that DA-STDMA protocol with directional antenna is much better in performance than with omni-directional antenna. Meanwhile, simulation shows that the location algorithm of directional antenna would exerts certain influence on the convergence time of the whole system.