摘要
针对变换域通信系统(TDCS)在复杂电磁环境下面临的通信干扰问题,提出一种基于存储转发机制的远距航空通信TDCS模型。通过对电磁频谱环境进行分析,对收发双方各自的频谱感知情况作具体分类;进而根据一致条件下的TDCS通信模型建立基于存储转发模块的收发频谱不一致条件下的远距航空通信TDCS模型,并对具体通信流程方案进行设计,以有效改善系统性能。仿真结果表明:干扰模型的建立与频谱的设定较为合理,收发频谱一致条件下TDCS性能接近于理想误码率;频谱不一致条件下TDCS可有效降低误码率,在较集中的梳状谱干扰下,误码率平均降低约24.48%,而且随信噪比(SNR)的增加,性能改善越明显,相同误码率下性能提升约1 dB。
In order to solve the problem of communication interference in Transform Domain Communication System( TDCS) under complex electromagnetic environment, a TDCS model based on store and forward mechanism was proposed.Based on the analysis of the electromagnetic spectrum environment, the spectrum sensing cases of transmitter and receiver were classified according to their respective perceptions. With the analysis of consistent spectrum conditions, the TDCS model for long distance aviation communication system was established based on store and forward modules in inconsistent spectrum conditions, and the specific communication schemes were designed, which can effectively improve the system performance.The simulation results show that the interference model and spectrum setting are reasonable, the performance of TDCS is close to the ideal bit error rate under the condition of the same spectrum. Under the condition of different frequency spectrum with more concentrated comb spectrum interference, the bit error rate is reduced by about 24. 48%; moreover, with the increase of Signal-to-Noise Ratio( SNR), the performance improvement is more obvious, and the performance improvement is about 1 dB under the same bit error rate.
出处
《计算机应用》
CSCD
北大核心
2018年第2期522-527,共6页
journal of Computer Applications
基金
国家自然科学基金资助项目(61401499)
新技术研究高校合作项目(KX162600022)~~
关键词
变换域通信系统
远距航空通信
存储转发机制
收发频谱不一致
Transform Domain Communication System(TDCS)
long distance aeronautical communication
store and forward mechanism
different frequency spectrum
