A new wideband adaptive digital predistortion technique employing feedback linearization

作者：Kim Jangheon^*; Woo Young Yan; Moon Junghwan; Kim Bumman

来源：IEEE Transactions on Microwave Theory and Techniques, 2008, 56(2): 385-392.

DOI：10.1109/TMTT.2007.914362

• memory effects
• power amplifier (PA)
• predistortion (PD)
• wideband code division multiple access (WCDMA)

We develop a new wideband digital feedback predistortion (WDFBPD) technique for modulated signals with wide bandwidths by combining digital feedback predistortion (DFBPD) linearization and memory-effect compensation techniques. For the experiments, a class-AB amplifier using an LDMOSFET with 90-W peak envelope power is employed. The proposed technique is compared with existing DFBPD and memory polynomial (MP) techniques for a 2.14-GHz forward-link WCDMA 2FA signal with 10-MHz carrier spacing. The experimental results show that the new WDFBPD technique has better linearization performance than conventional DFBPD and lower computational complexity than the MP technique.

• 出版日期2008-2