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Constant-Amplitude Biorthogonal Multi-Code Modulation  

Hong Dae ki (전자부품연구원)
Kang Sung jin (전자부품연구원)
Ju Min chul (전자부품연구원)
Kim Young sung (전자부품연구원)
Seo Kyeung hak (전자부품연구원)
Cho Jin woong (전자부품연구원)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.3C, 2005 , pp. 69-76 More about this Journal
Abstract
In this paper, we propose a biorthogonal modulation employing a constant-amplitude transmission of multi-code signals by introducing a simple constant-amplitude coding scheme with redundant bits. The proposed constant-amplitude biorthogonal multi-code (CABM) modulation can provide high spectral efficiency compared with a conventional direct sequence/spread spectrum (DS/SS) modulation. Nevertheless the proposed CABM modulation can keep up a constant-amplitude signal. Additionally, we propose various types of demodulation structures for the CABM modulation. Simulation results show that bit error rate (BER) performance and hardware complexity of the proposed CABM modulation are highly improved in comparison with those of a constant-amplitude orthogonal multi-code (CAOM) modulation.
Keywords
biorthogonal modulation; constant-amplitude coding; multi-code signal; spectral efficiency; bit error rate;
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