Title :
Bias circuit design of RF power amplifiers for TDD systems
Author :
Zhang, Ying ; Ye, Yan ; Liu, Taijun ; Li, Liang ; Xu, Gaoming ; Zhang, Juan ; Li, Jun
Author_Institution :
Coll. of Inf. Sci. & Eng., Ningbo Univ., Ningbo, China
Abstract :
In Time Division Duplex(TDD) system, the radio frequency (RF) power amplifier in a repeater is turned on only when it receives RF signal, thus implementing the sub-frame synchronization and the second conversion point of timeslots is important in TDD system. This paper introduce a bias circuit design to realize the control of the RF power amplifier in the down-link through envelop detection of the received RF signal. The experimental results demonstrated that the proposed bias circuit can properly control the operation status of the power amplifier for a TD-SCDMA system.
Keywords :
code division multiple access; power amplifiers; radiofrequency amplifiers; repeaters; synchronisation; time division multiplexing; RF power amplifier; RF signal; TD-SCDMA system; TDD system; bias circuit design; radio frequency power amplifier; repeater; subframe synchronization; time division duplex; Base stations; Power amplifiers; Radio frequency; Repeaters; Resource management; Synchronization; Time division synchronous code division multiple access; TDD; bias circuit; envelope detection; power amplifier;
Conference_Titel :
Electronics, Communications and Control (ICECC), 2011 International Conference on
Conference_Location :
Ningbo
Print_ISBN :
978-1-4577-0320-1
DOI :
10.1109/ICECC.2011.6066371
