直接序列扩频谐波载波偏移调制

该文提出直接序列扩频谐波载波偏移(HOC)调制方法。HOC信号的扩频码流由成谐波关系的子载波调制扩频波形构成，其自相关函数是包络和阵因子的乘积。分析表明，HOC信号的相关函数具有窄主峰，主峰宽度为信号的撑张带宽的倒数。该文分别就理想随机码和周期性伪随机码给出HOC信号自相关函数的解析表示式。该文指出，类似二相载波偏移(BOC)调制信号的周期性子载波偏移调制的信号均可表示成HOC信号。HOC信号具有可分解性，可时分实现。HOC信号的窄主峰，次峰可控制以及可分解性，决定其具有更好的距离分辨力和抗多径干扰以及抗人为干扰性能。该文通过HOC信号的具体构成例，给出了峰值平均功率比抑制的找平法。该文最后特别讨论了大撑张带宽HOC信号的性质。

Harmonic Offset Carrier Modulations for DS-SS

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.