从非正常高斯信号到非对称信号
A Journey from Improper Gaussian Signaling to Asymmetric Signaling
摘要：
连续和离散复随机变量从传统的正确和对称的假设，以广义的不正确和不对称的表征（会计之间的相关性随机实体和它的复共轭），分别偏差，介绍了新的设计自由度和各种潜在的优点。因此，不当行为理论在医学、地质学、声学、光学、图像和模式识别、计算机视觉以及其他众多的研究领域中有着广泛的应用，我们主要关注的是通信系统。本文从干扰受限通信中的非正常高斯信号设计出发，提出了一种更为精细和实用的非对称离散调制设计方法。这种非对称整形在编码/未编码无线/光通信系统中利用复杂的收发器和检测方案在理论上和实际上可实现的极限之间架起了桥梁。有趣的是，引入不对称性和调整传输参数，根据一些设计标准呈现最佳性能，而不影响系统的带宽或功率要求。这篇双重风格的文章首先介绍了教程基础内容，涵盖了现实/复杂性，适当/不适当和循环/非循环的相互作用，然后调查了这个巨大旅程中的大多数贡献。
英文摘要：
The deviation of continuous and discrete complex random variables from the traditional proper and symmetric assumption to a generalized improper and asymmetric characterization (accounting correlation between a random entity and its complex conjugate), respectively, introduces new design freedom and various potential merits. As such, the theory of impropriety has vast applications in medicine, geology, acoustics, optics, image and pattern recognition, computer vision, and other numerous research fields with our main focus on the communication systems. The journey begins from the design of improper Gaussian signaling in the interference-limited communications and leads to a more elaborate and practically feasible asymmetric discrete modulation design. Such asymmetric shaping bridges the gap between theoretically and practically achievable limits with sophisticated transceiver and detection schemes in both coded/uncoded wireless/optical communication systems. Interestingly, introducing asymmetry and adjusting the transmission parameters according to some design criterion render optimal performance without affecting the bandwidth or power requirements of the systems. This dual-flavored article initially presents the tutorial base content covering the interplay of reality/complexity, propriety/impropriety and circularity/noncircularity and then surveys majority of the contributions in this enormous journey.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
