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| Harmonic Offset Carrier Modulations for DS-SS |
| Dong Hong-fei Zhang Er-yang Shen Rong-jun |
| School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract This paper describes a class of offset carrier modulations for Direct Sequence-Spreal Spectrum (DS- SS) called Harmonic Offset Carrier (HOC) modulations. The spread spectrum waveform of HOC signal is composed of spreading code modulated by harmonic subcarriers. The auto-correlation function of HOC is equal to the envelope multiplied by harmonic factors. The first peak of the auto-correlation function is narrow, and its width is equal to reciprocal of spanned bandwidth of the signal. The closed form auto-correlation function of HOC modulation is given in this paper. This paper indicates that a Binary Offset Carrier (BOC) modulation could be write as a HOC modulation. HOC signal could be disjoined, and each subcarrier could implement in difference time. HOC signal could achieves high performance of anti-jamming, high resolution of time of arrival measurements, and high performance in multiple path environments. HOC signal synthesized in this paper presents a method how to reduce peak power to average power ratio. In final part of this paper, the character of extra spanned bandwidth HOC modulation is discussed.
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Received: 17 February 2012
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Corresponding Authors:
Dong Hong-fei
E-mail: dong_hongfei@sina.com
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2012, Vol. 34 
