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  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E82-C   No.5   pp.708-716
Publication Date: 1999/05/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Low Distortion Technology for Microwave Devices and Circuits)
Category: 
Keyword: 
direct conversion receiver,  linear modulation scheme,  RF stage gain control,  initial burst acquisition,  DC offset canceler,  2nd-order intermodulation distortion,  

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Summary: 
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.