TY - Front. Electr. Electron. Eng. A1 - WEI Xiao-wei, CAO Zhi-gang T1 - Fast identification of digital amplitude modulation level at low signal-to-noise ratio Y1 - 2006-12-05 JF - Frontiers of Electrical and Electronic Engineering JO - Front. Electr. Electron. Eng. SP - 421 EP - 424 VL - 1 IS - 4 UR - https://journal.hep.com.cn/fee N1 - 10.1007/s11460-006-0080-6 ER -