在无人机下行数据链通信中,我们采用OFDM-DCSK技术,将数据编码为DCSK信号,然后通过OFDM技术进行调制和传输。该方法可以有效地提高系统的频谱利用率和抗干扰能力,从而确保无人机与地面控制中心之间的数据传输稳定可靠。 四、方法性能分析 我们通过仿真实验对基于OFDM-DCSK的无人机下行数据链通信方法进行了性能分析。实验结...
《基于OFDM-DCSK的无人机下行数据链通信方法的研究》一、引言随着无人机技术的快速发展,其在军事、民用等领域的应用越来越广泛。无人机下行数据链通信作为无人机与地面控制中心之间的重要通信方式,其性能的优劣直接影响到无人机的控制精度和任务完成效率。传统的通信方法在面对复杂多变的通信环境时,常常存在抗干扰...
OFDM-DCSK通信系统,涉及无线通信领域,本发明是为了在OFDM-DCSK系统中增加数据速率,解决RF延时问题,本发明是不相干的混沌通信方案,在该方案中,所有的子载波分为几组,每组的中央子载波传送混沌参考序列,而其它组内的子载波用来传送被调制的数据流.因此相比于传统的DCSK系统,这种发送结构提高了频谱利用率.在接收端无需...
In this paper, we introduce a grouping approach for power allocation in the multi-user OFDM-DCSK (MU-OFDM-DCSK) system under the frequency selective fading channels. The suggested procedure is convenient also for the other comb-type non-coherent schemes with similar structure. Furthermore, we de...
The invention discloses an OFDM-DCSK (Orthogonal Frequency Division Multiplexing-Differential Chaos Shift Keying) communication system and relates to the wireless communication field. The purpose of the invention is that the data rate is increased in the OFDM-DCSK communication system to solve the ...
OFDMDCSK通信系统,涉及无线通信领域,本发明是为了在OFDMDCSK系统中增加数据速率,解决RF延时问题,本发明是不相干的混沌通信方案,在该方案中,所有的子载波分为几组,每组的中央子载波传送混沌参考序列,而其它组内的子载波用来传送被调制的数据流.因此相比于传统的DCSK系统,这种发送结构提高了频谱利用率.在接收端无需射频...
An OFDM-DCSK based Approach for D2D Emergency CommunicationsMobini, MajidMajlesi Journal of Telecommunication Devices
By exploiting the rank-1 property of the symbol matrix, we propose to apply dimensionality reduction on the time-domain data symbols received from the OFDM-DCSK transmitter for noise reduction, followed by chaotic demodulation on the resultant symbols to decode the information bits. In the presence...
Power allocationIn this paper, we introduce a grouping approach for power allocation in the multi-user OFDM-DCSK (MU-OFDM-DCSK) system under the frequency selective fading channels. The suggested procedure is convenient also for the other comb-type non-coherent schemes with similar structure. ...
The performance of the PIM-OFDM-DCSK is tested under additive white gaussian noise and multipath fading channel. Furthermore, the bit error rate is derived based on the wiretap system for the proposed PIM-OFDM-DCSK and compared with other DCSK modulations. The resu...