东南大学学报（自然科学版）2017，Vol.47Issue(4)：637-641,5.DOI:10.3969/j.issn.1001-0505.2017.04.002
基于混合OFDM调制的认知网络快速组网技术
Fast networking technologies based on hybrid OFDM modulation for cognitive radio networks
摘要
Abstract
To make the node device have the ability of quickly networking under complicated network environments, a hybrid OFDM (orthogonal frequency division multiplexing) modulation algorithm based on the cyclic spectrum feature of signals is proposed, and applied in cooperative cognitive networks.Utilizing inherent cyclic spectrum features and artificially embedding distinct cyclo-stationary identification, the proposed algorithm can agilely distinguish four kinds of channel states, that is, spectrum idle, master signals transmitting, secondary signal transmitting, and hybrid signals transmitting.The algorithm can strengthen the spectrum characteristics of signals, and help the nodes to access and withdraw fast and reliably.Further, by signing different cognitive networks with the locations of hybrid modulation signals, cognitive nodes can identify signals from different networks, so as to make the system have the ability of aglily networking.Simulation results show that the proposed algorithm can identify the modulation method and network sign number of nodes in real time, thus achieving the objective of agilely networking with the improved spectrum efficiency.关键词
正交频分多路复用/认知无线电/快速组网/循环平稳/混合调制Key words
OFDM (orthogonal frequency division multiplexing)/cognitive radio/fast networking/cyclo-stationary/mixed modulation分类
信息技术与安全科学引用本文复制引用
叶芝慧,李昂,彭文攀..基于混合OFDM调制的认知网络快速组网技术[J].东南大学学报（自然科学版）,2017,47(4):637-641,5.基金项目
国家海洋公益重大专项资助项目(201205035). （201205035）
