摘要
在卫星通信无线传输场景中,卫星高速运动导致的多普勒频移以及高速率传输引入的码间干扰是制约卫星传输性能的两个重要因素。区别于传统添加循环前缀的正交频分复用系统,基于交错正交幅度调制的正交频分复用(OFDM/OQAM)系统,通过选择时频聚焦优化的成形滤波器函数,可无须添加循环前缀,可抵抗字符间干扰(ISI)和载波间干扰(ICI)。因此,OFDM/OQAM系统能够满足卫星通信系统高动态链路高速率传输的要求。
In wireless transmission of satellite communication, satellite high speed led to the Doppler frequency shift and high speed transmission of Inter symbol interference is introduced two important factors restricting the performance of satellite transmission. Different from adding a cyclic prefix in orthogonal frequency division multiplexing system (OFDM), staggered-quadrature amplitude modulation and orthogonal frequency division multiplexing (OFDM/OQAM) system by selecting a time-frequency shaping filter function focused optimization, without adding a cyclic prefix, resistance characters interference (ISI) and inter-carrier interference (ICI). Therefore, the OFDM/OQAM system can meet the high dynamic link high speed transmission satellite communications system requirements.
出处
《电子科学技术》
2016年第1期41-45,共5页
Electronic Science & Technology
关键词
正交频分复用
交错正交幅度调制
成形滤波器
卫星通信
Orthogonal Frequency Division Multiplex
Offset QAM
Pulse Shaping Filter
Satellite Communication
