Title :
Adaptive compensation of analog front-end I/Q mismatches in digital receivers
Author :
Çetin, Ediz ; Kale, Lzzet ; Morling, Richard C S
Author_Institution :
Dept. of Electron. Syst., Westminster Univ., London, UK
Abstract :
I and Q channel phase and gain mismatches are of great concern in communications receiver design. In this paper we analyse the effects of I and Q channel mismatches and propose a low-complexity blind adaptive algorithm to minimize this problem. The proposed solution consists of two, 2-tap adaptive filters, arranged in Adaptive Noise Canceller (ANC) set-up, with the output of one cross-fed to the input of the other. The system works as a de-correlator eliminating I and Q mismatch errors
Keywords :
adaptive filters; compensation; decorrelation; mixed analogue-digital integrated circuits; transceivers; 2-tap adaptive filters; I/Q mismatches; adaptive compensation; adaptive noise canceller; analog front-end; communications receiver design; de-correlator; digital receivers; low-complexity blind adaptive algorithm; mismatch errors; Adaptive algorithm; Adaptive filters; Algorithm design and analysis; Baseband; Costs; Digital signal processing; Microelectronics; Noise cancellation; Radio frequency; Very large scale integration;
Conference_Titel :
Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6685-9
DOI :
10.1109/ISCAS.2001.922250
