Feedforward power amplifier control method using weight divided adaptive algorithm

被引：0
|
作者：
Horiguchi, K [1 ]
Okamura, A [1 ]
Nakayama, M [1 ]
Ikeda, Y [1 ]
Takagi, T [1 ]
Ishida, O [1 ]
机构：
[1] Mitsubishi Electr Corp, Informat Technol R&D Ctr, Kamakura, Kanagawa 2478501, Japan
来源：
IEICE TRANSACTIONS ON ELECTRONICS | 2003年 / E86C卷 / 08期
关键词：
normalized least mean square; adaptive algorithm; feedforward; power amplifier; microwave;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Weight divided adaptive control method for a microwave FeedForward Power Amplifier (FFPA) is presented. In this adaptive controller, an output signal of a power amplifier is used as reference signal. Additionally, reference signal is divided by the weight of adaptive filter, so that characteristics of the power amplifier, such as temperature dependence, do not have influence on the convergence performances. The proposed adaptive algorithm and the convergence condition are derived analytically and we clarify that the proposed weight divided adaptive algorithm is more stable than the conventional Normalized Least Mean Square (NLMS) algorithm. Then, the convergence condition considering phase calibration error is discussed. The effectiveness of the proposed algorithm are also verified by the nonlinear simulations of the FFPA having AM-AM and AM-PM nonlinearity of GaAsFET.
引用
收藏
页码：1494 / 1500
页数：7
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