An application research of orthogonal multi-carrier transmission in satellite mobile communication system
- Paper ID
20796
- author
- company
China Academy of Space Technology (CAST)
- country
China
- year
2014
- abstract
An orthogonal multi-carrier signaling scheme is commonly featured with a higher spectrum utility and a larger channel capacity, which becomes more important to satellite application considering a gradually rarer frequency resource limitation and increasingly higher data transmitting rate requirement to various satellite fixed and mobile communication and broadcasting services. The orthogonal multi-carrier signaling scheme has been widely applied in terrestrial wireless communication system, which is generally regarded as one of the most popular concept in the 4th generation (4G) wireless communication. It was originally developed to solve the multipath delay problem, and supports much higher data rate, for instance an over 100Mbps of multimedia rate has been adopted in the wireless LAN/MAN system. Hence, this novel signaling scheme could be utilized to improve the data transmission performance, provide higher channel capacity, as well as cope with any typical channel interference within satellite and/or terrestrial mobile fading transmitting environment. Above all, an introduction to the orthogonal multi-carrier system will be presented and studied in this paper, the newly proposed signaling scheme could be simply modulated via a FFT algorithm; for receiving and demodulating such signal, a joint estimation method could be adopted to solve the problems such as channel fading, multipath delay and multi-access/multi-user interference. Moreover, as multi-carrier system always induces an inter-modulation product problem within any amplifier unit like TWTAs, a solution of self-cancellation means would be applied to eliminate such interference. For an application study of this novel transmission signaling, it could be widely applied for varied satellite fixed and mobile communication and broadcasting services, two typical application models would be discussed in this paper, as satellite fixed broadcasting and mobile communication services respectively. Finally, the research result would be concluded as that this orthogonal multi-carrier signaling scheme could significantly spare the system frequency and spectrum resources, meanwhile, remarkably advance the system data transmitting rate, which will make it possible to allow a much wider scope of data services, such as ultra-high data rate multimedia communication services with data transmitting speed of over hundreds Mbps or even Gbps, to widen the satellite mobile communication application fields. This transmission scheme would be primarily fulfilled for developing and boosting the international satellite application services. The proposed signaling scheme is practical, affordable, and commercially viable, which can be vastly applied by a great many fields of communication application, including the terrestrial mobile communication and multimedia broadcasting system, and satellite mobile communication and fixed broadcasting application system.