TL;DR
Golden Angle Modulation (GAM), inspired by natural spiral patterns, offers a shape-versatile, circular symmetric modulation scheme that approaches Shannon capacity and overcomes QAM's shaping loss, especially useful in resource-limited communication links.
Contribution
The paper introduces GAM, a novel modulation scheme inspired by natural spiral arrangements, with shape versatility and capacity-approaching performance, surpassing traditional QAM.
Findings
Bell-GAM approaches Shannon capacity.
Overcomes asymptotic shaping-loss of QAM.
Suitable for resource-limited communication links.
Abstract
Quadrature amplitude modulation (QAM) exhibits a shaping-loss of , ( dB) compared to the AWGN Shannon capacity. With inspiration gained from special (leaf, flower petal, and seed) packing arrangements (spiral phyllotaxis) found among plants, a novel, shape-versatile, circular symmetric, modulation scheme, the Golden Angle Modulation (GAM) is introduced. Disc-shaped, and complex Gaussian approximating bell-shaped, GAM-signal constellations are considered. For bell-GAM, a high-rate approximation, and a mutual information optimization formulation, are developed. Bell-GAM overcomes the asymptotic shaping-loss seen in QAM, and offers Shannon capacity approaching performance. Transmitter resource limited links, such as space probe-to-earth, and mobile-to-basestation, are cases where GAM could be particularly valuable.
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Taxonomy
TopicsOptical Network Technologies · graph theory and CDMA systems · Advanced Wireless Communication Techniques