CAJ | 학술논문

在同步轨道卫星通信系统中，为了进一步提高用户终端在受到遮挡或其他情况导致信道质量恶化时仍能最大程度地正确接收寻呼的能力，提出一种可用于增强寻呼的逻辑信道突发改进方案。设计了一种运用RS编码与扩频技术的增强寻呼突发结构，方案以码元为单位将编码后的寻呼消息拆分，经过扩频调制后发送，可以纠正随机错误，充分利用了编码和扩频增益。利用仿真可以看出，与现有方法相比，改进方案可以有效地提升寻呼消息的接收性能，降低寻呼消息在高斯信道下的误码率。同样，在更贴近真实的莱斯衰落信道下的性能也有明显改善。
재동보궤도위성통신계통중，위료진일보제고용호종단재수도차당혹기타정황도치신도질량악화시잉능최대정도지정학접수심호적능력，제출일충가용우증강심호적라집신도돌발개진방안。설계료일충운용RS편마여확빈기술적증강심호돌발결구，방안이마원위단위장편마후적심호소식탁분，경과확빈조제후발송，가이규정수궤착오，충분이용료편마화확빈증익。이용방진가이간출，여현유방법상비，개진방안가이유효지제승심호소식적접수성능，강저심호소식재고사신도하적오마솔。동양，재경첩근진실적래사쇠락신도하적성능야유명현개선。
To further improve the correct reception paging ability of user terminal to an extreme extent when the user termi?nal is covered or channel quality is deteriorated by other situations,an improved scheme of the logical channel burst for en?hanced paging is proposed for synchronous orbit satellite communication system. The enhanced paging burst structure is de?signed by RS coding and spread spectrum (SPSP) technology. The proposed scheme takes code element as the unit and splits the paging message which is transmitted after SPSP modulation,random errors are corrected,and it takes full advantage of coding and SPSP gains. The simulation results show that the improved scheme can effectively enhance the reception performance of the paging message and reduce the error rate in Gauss channel,compared with the conventional method. Similarly,the performance is also significantly improved in RICE fading channel which is most close to the actual situation.