Modulation Index Estimation of Frequency and Phase Modulated Signals

• 作者: Derong Cai Geng Peng Zhiqiang He Zhitao Huang
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 医学
• 关键词: Information Processing Technology BLIND ESTIMATION MODULATION Index AM SIGNAL
• 年，卷（期）: 2010,（9）
• 页码范围: 773-778
• 页数: 6页
• 分类号: R73

摘要

Modulation index estimation is important in the demodulation and recognition of Angle Modulation (AM) signals which include Frequency Modulation (FM) and Phase Modulation (PM) signals. In this paper, we firstly analyzed the AM signals with baseband modulation types, such as monotone, PSK, FSK, in the time and frequency domain. Then, we established a unified mathematical representation for the AM signals. Finally, we derived a blind estimation algorithm for the modulation index without using any prior knowledge. Simulation results verify the capabilities of the proposed algorithm.