Two new methods are developed for blind estimation for long-code chaotic spread spectrum sequence.
针对长码实值混沌直扩系统，提出了两种盲解扩算法。
Chaos masking, chaotic parameter modulation, chaos shift keying, chaotic spread spectrum sequence are discussed in detail.
其中重点分析了混沌掩盖技术，混沌参数调制技术，混沌键控技术和混沌扩频技术的原理。
A new method of blind estimation for short-code chaotic spread spectrum sequence is proposed, which is based on principal component analysis (PCA) and has good performance at low SNR condition.
针对短码实值混沌直扩系统，提出了一种基于主元分析的算法，实现了在低信噪比下对直扩序列的盲估计。
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