IEICE Transactions on Communications
Online ISSN : 1745-1345
Print ISSN : 0916-8516
Regular Section
Comprehensive Feasibility Study on Direct Spectrum Division Transmission over Multiple Satellite Transponders
Fumihiro YAMASHITADaisuke GOTOYasuyoshi KOJIMAJun-ichi ABETakeshi ONIZAWA
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2021 年 E104.B 巻 4 号 p. 446-454

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We have developed a direct spectrum division transmission (DSDT) technique that can divide a single-carrier signal into multiple sub-spectra and assign them to dispersed frequency resources of the satellite transponder to improve the spectrum efficiency of the whole system. This paper summarizes the satellite experiments on DSDT over a single and/or multiple satellite transponders, while changing various parameters such as modulation schemes, roll-off ratios, and symbol rates. In addition, by considering practical use conditions, we present an evaluation of the performance when the spectral density of each sub-spectrum differed across transponders. The satellite experiments demonstrate that applying the proposal does not degrade the bit error rate (BER) performance. Thus, the DSDT technique is a practical approach to use the scattered unused frequency resources over not only a single transponder but also multiple ones.

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© 2021 The Institute of Electronics, Information and Communication Engineers
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