摘要
从信息理论基础和通信技术源头开展创新,将高频谱效率的扩展二进制相移键控调制波形、极大提升解调前信噪比的数字冲击滤波器、自适应锁相解调方法和进一步提升解调性能的波形参数匹配技术有机融为一种全新而独特的高效通用调制解调体制,并结合导航星座星间链路的要求进行仿真。结果表明其特定信噪比下单位带宽可传输的信息速率bit/s/Hz/SNR(Signal Noise Ratio)综合指标显著超过现有对比技术,且码率、带宽和信噪比可与空间环境自适应。
A novel, special combined harmoniously EBPSK demodulation method and param and highly efficient modulation system was proposed, which （Extended BPSK） modulation, eter matching technology. The digital impulsion filter, adaptive signal system of GNSS ISLs with novel modulation and demodulation was simulated and analyzed. The results show integrated index （bit/s/Hz/SNR） of the new signal system outperforms other pr And many important parameters of the new signal system, such as rate, band-width change with space environment. esent that the systems. and SNR, may
出处
《中国空间科学技术》
EI
CSCD
北大核心
2011年第4期15-22,共8页
Chinese Space Science and Technology
关键词
超窄带调制
信号体制
星间链路导航卫星
Ultra narrow band modulation Signal system Inter-satellite links Navigation Satellite
