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本文中,人工噪声信号指具有完全随机性的群补码信号。这种信号是在频率、相位和幅度上模仿自然噪声,用人工方法产生的多序列码群,经过相关处理后,其自群相关函数的主瓣值在理论上是不受限制的,而所有副瓣为零;其互群相关函数中的一种,则具有主副瓣均为零的正交性能。群补码的这一性能类似白噪声的自相关与互相关性能,因而,比现有的伪随机码、巴克码、弗兰克多相码、赫夫曼码、P_1、P_2、P_3、P_4码性能都好,不仅有很强的抗干扰性,同时,具有很好的保密性。可以在雷达、通信、遥控遥测等场合使用。本文论述人工噪声信号的类型、性能、自群相关函数、互群相关函数、码分多址性能及人工噪声信号的应用,并以最简单的二相群补码为例加以说明。
In this paper, artificial noise signal refers to a completely random group complement signal. This kind of signal is a kind of multi-sequence code group imitating natural noise in frequency, phase and amplitude by artificial method. After the correlation processing, the main lobe value of its self-correlation function is theoretically unlimited, and all The sidelobe is zero; one of its cross-correlation functions has an orthogonality of zero for both the main and side lobes. Compared with the existing pseudo-random codes, Barker codes, Frank multi-phase codes, Huffman codes, P_1, P_2, P_3, P_4 codes, the performance of the two’s complement codes is similar to that of white noise. All good, not only has a strong anti-interference, at the same time, with good confidentiality. Can be used in radar, communications, remote telemetry and other occasions. This article discusses the types of artificial noise signal, performance, self-correlation function, cross-correlation function, code division multiple access performance and artificial noise signal applications, and the simplest two-phase group complement as an example to illustrate.