한국해양대학교

Detailed Information

Metadata Downloads

AWGN 채널환경에서 직접변환 수신기의 DC-offset 제거 방법에 관한 연구

Title
AWGN 채널환경에서 직접변환 수신기의 DC-offset 제거 방법에 관한 연구
Alternative Title
(A) Study on a Elimination Method of DC-offset in Direct-Conversion Receiver under Additive White Gaussian Noise Environment
Author(s)
박성진
Publication Year
2000
Publisher
한국해양대학교 대학원
URI
http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002173729
http://repository.kmou.ac.kr/handle/2014.oak/8155
Abstract
Recently, the performance of the commercial PCS (Personal Communication Service) system has been improved to the uppermost limit and ultimately the next generation mobile communication is to be realized by IMT-2000 (International Mobile Communication-2000) to provide multimedia services.


Therefore, the new type receiving system is researched actively and one of the most important part in a receiver is direct conversion method. The direct conversion method is suitable for low power consumption, small size, MMIC, and low price, which is to be adopted to the next generation mobile communication systems. In this case, however, several problems occur due to DC-offset. The DC-offset suppresses amplification of the required signal becasue of the leakage signal of frequency synthesizer in the system.


In this thesis, the removing method of DC-offset was considered. There are four removing techniques of DC-offset, which are AC-coupling, large capacitor, dc-feedback loop, and dc-free coding. Among these, the AC-coupling method is the most simplest method and the dc-feedback loop method has the best performance. Then, the performance of the AC-coupling method and dc-feedback loop method are evaluated by HP's ADS simulation tool.


As a result, the AC-coupling method cannot be used to the digital communication systems due to data loss. On the other hand, it was confirmed that the dc-feedback loop method is suitable for the direct conversion receiver.
Appears in Collections:
전파공학과 > Thesis
Files in This Item:
000002173729.pdf Download

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse