Cross-polarisation discrimination-induced interference in dual-polarised high-capacity satellite communication systems

The Journal of Engineering

Abdulkareem Sarki Karasuwa¹  Ifiok E. Otung¹  Jon D. Eastment² 

[1] Mobile and Satellite Communications Research Group, School of Engineering, University of South Wales, Pontypridd, CF37 1DL, United Kingdom;Science and Technology Facilities Council (STFC), Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom

关键词: multiple spot beams;    link performance;    dual-polarised satellite communication systems;    co-channel cross-polar signal;    dual orthogonal polarisation mode;    Ka-b;    frequency;    tropical climatic regions;    temperate climatic regions;    ubiquitous broadb;    multimedia communication;    CNIR;    high-speed Internet access;    cross-polarisation discrimination-induced interference;    hydrometeor-induced depolarisation;    high-capacity satellite communication systems;    carrier-to-noise-plus-interference ratio;    satellite links;    depolarisation-induced interference;    allocated radio spectrum;   

DOI  :  10.1049/joe.2015.0178

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

The design of spectrally-efficient, high-throughput satellite (HTS) systems with capacity approaching one terabit per second requires operating at Ka-band frequencies and above, where there are several gigahertz of allocated radio spectrum, using multiple spot beams with dual orthogonal polarisation mode. At these high frequencies, rain attenuation poses a major obstacle to the design of high-availability satellite links which are needed for the realisation of ubiquitous broadband multimedia communication services including high-speed Internet access at rural and remote locations. Furthermore, depolarisation-induced interference in such systems could have a performance-limiting impact if a co-channel cross-polar signal combines with system noise to drive the carrier-to-noise-plus-interference ratio (CNIR) below an acceptable threshold. This paper employs real measurement data to investigate the impact of depolarisation-induced interference on dual-polarised HTS systems for temperate and tropical climatic regions. Scenarios that cause significant system performance degradation are analysed, including the effects of signal frequency, antenna size, and regional rainfall rate. The impact of depolarisation on system performance is quantified by the reductions in the CNIR and link availability of a dual-polarised system when compared with those of a similarly-dimensioned single-polarised system.

【 授权许可】

CC BY