Title :
A time-continuous optimization method for automatic adjustment of gain and phase imbalances in feedforward and LINC transmitters
Author :
Shi, Bo ; Sundstrom, Lars
Author_Institution :
Inst. for Commun. Res., Singapore, Singapore
Abstract :
This paper presents a time-continuous optimization method that can be used for automatic adjustment of gain and phase imbalances in the feedforward and LINC transmitters. Details on how it can be implemented are given. In contrast to algorithm-based optimization techniques, this method does not require any decisions to be made while operating and can be realized with a continuous-time analog circuitry. The functionality of the method has been verified by means of simulations and results demonstrate that it is sufficient to suppress the out-of-band power of the radio transmitters for wireless communications.
Keywords :
continuous time systems; feedforward; optimisation; radio transmitters; LINC transmitter; automatic adjustment; continuous-time analog circuit; feedforward transmitter; gain imbalance; out-of-band power suppression; phase imbalance; radio transmitter; time-continuous optimization; wireless communication; Circuit simulation; Frequency conversion; High power amplifiers; Interference; Intermodulation distortion; Linearization techniques; Optimization methods; Radio transmitters; Temperature sensors; Wireless communication;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205496
