摘要
高效的调制和解调技术对数据传输具有重要的意义。推导了统一的正交二元偏移键控(UBSK)信号的功率谱密度表达式,去除了高次谐波,获得了基本波形的优化结果,提高了频谱效率。通过仿真,探讨了优化的功率谱密度随参数θ和τ的变化规律。结果表明:一定的参数条件下,优化后的功率谱密度相比优化前能实现约30 dB的边带衰减。
High efficiency modulation and demodulation techniques are significant for data transmission. In the paper, Power Spectrum Density （PSD） of Orthogonal Unified Binary Shift Keying （UBSK） is figured out. Higher order harmonic components are reduced for spectrum efficiency improvement, with optimized waveform expressions. Computer simulations reveal that the relation between PSD and UBSK parameters, as 0 and r are concerned. And it＇s also demonstrated by simulations that about 30 dB PSD attenuation in sideband can be realized through optimization.
出处
《电波科学学报》
EI
CSCD
北大核心
2008年第5期965-968,981,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金(60472054)资助项目
