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System-Level Compensation Approach to Overcome Signal Saturation, DC Offset, and 2nd-Order Nonlinear Distortion in Linear Direct Conversion Receiver
Hiroshi TSURUMI Miyuki SOEYA Hiroshi YOSHIDA Takafumi YAMAJI Hiroshi TANIMOTO Yasuo SUZUKI
IEICE TRANSACTIONS on Electronics
Publication Date: 1999/05/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
direct conversion receiver, linear modulation scheme, RF stage gain control, initial burst acquisition, DC offset canceler, 2nd-order intermodulation distortion,
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The architecture and control procedure for a direct conversion receiver are investigated for a linear modulation scheme. The proposed design techniques maintain receiver linearity despite various types of signal distortion. The techniques include the fast gain control procedure for receiving a control channel for air interface connection, DC offset canceling in both analog and digital stages, and 2nd-order intermodulation distortion canceling in an analog down-conversion stage. Experimental and computer simulation results on PHS (Personal Handy-phone System) parameters, showed that required linear modulation performance was achieved and thus the applicability of the proposed techniques was demonstrated.