標題: An Approach Attaining Adjustable Designated Footprint
作者: Hsieh, Wan-Hsin
Chang, Chieh-Fu
Kao, Ming-Seng
交大名義發表
National Chiao Tung University
公開日期: 2009
摘要: In satellite communications, the footprint is characterized by contour lines with specific receiving power When data is delivered to the area within a specific footprint, called the designated footprint, illegal users outside the boundary of designated footprint (BDF) can still receive the signal with degraded power. In other words, illegal users can obtain the transmitted data with higher error probability. In this paper, we present a special two-stage serially concatenated (2-SC) coding scheme to more precisely define the designated footprint. Hence users outside the BDF are excluded from obtaining the data, i.e. they cannot correctly decode the data. The key technique, 2-SC coding scheme, achieves the brick-wall effect in error performance regarding bit energy-to-noise density ratio (E(b) / N(0)). The brick-wall effect has sharp cutoff at a critical E(b) / N(0). When the transmitted data is protected by the 2-SC coding scheme, only the users within the designated footprint can successfully decode the data. Otherwise, for users outside the BDF with received E(b) / N(0) slightly less than critical E(b) / N(0), even if the coding structure is known, they cannot correctly decode the data. Thus the BDF is sharply defined by the critical E(b) / N(0). Moreover, by means of purposely-introduced error in the codewords, we can adjust the critical E(b) / N(0) and the BDF. We provide comprehensive analysis of the coding performance and further discuss the application of the proposed scheme to enhance secure satellite communications.(12)
URI: http://hdl.handle.net/11536/17647
ISBN: 978-1-4244-2621-8
ISSN: 1095-323X
期刊: 2009 IEEE AEROSPACE CONFERENCE, VOLS 1-7
起始頁: 1118
結束頁: 1125
顯示於類別:會議論文