Title :
Auto calibration with training sequences for wireless local loop at 26 GHz
Author :
Chakra, S. Abou ; Huyart, B.
Author_Institution :
Ecole Nat. Superieure des Telecommun., Paris, France
Abstract :
Quadrature signal processing is widely used in current communication receivers. However, all inphase/quadrature (I/Q) processing receiver structures face a common problem of matching the amplitudes and phases of the inphase and the quadrature branches. This article proposes an auto calibration method, for I/Q imbalance compensation using base band digital processing on training sequences transmitted with data bursts of a test platform for a wireless local loop at 26 GHz. After a description of the test platform, a calibration method is proposed and its influence on the improvement of the transmission´s performance, in term of phase constellation diagram and bit-error rate, presented.
Keywords :
calibration; quadrature phase shift keying; radio access networks; radio receivers; signal processing; 26 GHz; I/Q imbalance compensation; I/Q processing receiver structures; auto calibration method; base band digital processing; bit-error rate; communication receivers; communication system performance; inphase/quadrature; millimeter wave communication; phase constellation diagram; quadrature phase shift keying; quadrature signal processing; training sequences; transmission performance; wireless local loop; Amplitude modulation; Band pass filters; Calibration; Constellation diagram; Frequency; Phase modulation; Power amplifiers; Quadrature phase shift keying; Radiofrequency amplifiers; Testing; Calibration; communication system performance; correlation; millimeter wave communication; quadrature phase shift keying;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.832628
