Frequency-Domain Differential Coding Schemes under Frequency-Selective Fading Environment in Adaptive Baseband Radio


IEICE TRANSACTIONS on Communications   Vol.E99-B   No.2   pp.488-498
Publication Date: 2016/02/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
baseband radio,  cognitive radio,  software-defined radio,  frequency-domain packet communication,  DSFBC,  spectrum-spreading reverberation chamber,  

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In our previous paper, we presented a concept of “Baseband Radio” as an ideal of future wireless communication scheme. Furthermore, for enhancing the adaptability of baseband radio, the adaptive baseband radio was discussed as the ultimate communication system; it integrates the functions of cognitive radio and software-defined radio. In this paper, two transmission schemes that take advantage of adaptive baseband radio are introduced and the results of a performance evaluation are presented. The first one is a scheme based on DSFBC for realizing higher reliability; it allows the flexible use of frequency bands over a wide range of white space. The second one is a low-power-density communication scheme with spectrum-spreading by means of frequency-domain differential coding so that the secondary system does not seriously interfere with primary-user systems that have been assigned the same frequency band.