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Design and Implementation of Down-Converter for WCDMA Digital Optic Repeater  

김성수 (숭실대학교 전자공학과)
강원구 (숭실대학교 전자공학과)
장인봉 ((주)엔시테크)
양승인 (숭실대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.14, no.9, 2003 , pp. 974-978 More about this Journal
Abstract
The down-converter of the WCDMA Digital Optic Repeater is developed. Based on the system specifications, the structure of the down-converter is accomplished and its block diagram is drawn. The down-converter is implemented according to these block diagrams. Subsequently a low pass filter, an automatic level controlled attenuator, a frequency synthesizer and other components for the down-converter are designed and implemented, and a main board to integrate these modules is also manufactured. To reduce the noise floor of system and suppress the RF spurious noise, a PCB layout is performed carefully. For each module consisting of the down-converter and the entire system, the performance tests are accomplished to check the performance about the specifications.
Keywords
WCDMA; Down-Converter; Optic Repeater; ACLR;
Citations & Related Records
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