Title :
Post-distortion linearizer for multicarrier power amplifiers using a fifth-order error signal generator
Author :
Han, Jae-Hee ; Lee, Duck-Hee ; Nam, Sangwook ; Lim, Jong-Sik ; Yun, Jongsup ; Kang, Sungchoon
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A novel linearization technique for a RF high power amplifier (HPA) using a fifth-order error signal generator (ESG5) is presented. The proposed method employs the input signal to generate the equal amplitude but anti-phase intermodulation components produced by the HPA. This signal is combined at the output of HPA to reduce the intermodulation distortion levels. Hence the stability of the system is guaranteed due to the open loop configuration, and broadband operation is also possible similar to feedforward systems
Keywords :
UHF power amplifiers; circuit stability; intermodulation distortion; linearisation techniques; signal generators; RF high power amplifier; anti-phase intermodulation components; broadband operation; feedforward systems; fifth-order error signal generator; intermodulation distortion levels; linearization technique; multicarrier CDMA signal; multicarrier power amplifiers; open loop configuration; post-distortion linearizer; system stability; third-order intermodulation product; Cities and towns; Dynamic range; Feedforward systems; High power amplifiers; Intermodulation distortion; Linearization techniques; Power amplifiers; Power generation; Radio frequency; Signal generators;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985639
