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Featured researches published by Eung-Bae Kim.


ieee region 10 conference | 1997

A speech coder with low complexity and optimized codebook

Sekchin Chang; Eung-Bae Kim; Ki-Cheol Han

This paper describes a speech coder with low complexity and optimized codebook. A 13 kb/s speech coder is used for upbanded IS-95, a personal communications system (PCS) standard. This speech coder is called Qualcomm code excited linear prediction (QCELP). The QCELP coder uses the closed-loop search for all pitch delays in each pitch subframe. This pitch search requires a large computation time. The coder has two codebooks, each of which consists of 128 circular entries which are generated from a Gaussian source. This kind of circular Gaussian codebook reduces the storage complexity, but does not have the speech property. We used a two-stage pitch analysis for complexity reduction and an optimized codebook, which has a speech property and a circular structure, for better Korean speech quality. The improved coder shows a better performance than that of the original QCELP coder in terms of complexity and speech quality.


Archive | 2002

Apparatus and method for tracking location of mobile station

Eung-Bae Kim; Seung-Hwan Lee


Microwave and Optical Technology Letters | 2002

A broadband microstrip antenna array for LMDS applications

Soonsoo Oh; Seongho Seo; Mikyoung Yoon; Changyoul Oh; Eung-Bae Kim; Young Sik Kim


ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications | 2003

Development Status of BWA System in ETRI

Seung-Hwan Lee; Eung-Bae Kim


ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications | 2002

On the Selection of Burst Preamble Length for the Symbol Timing Estimate in the AWGN Channel

Seung-Hwan Lee; Eung-Bae Kim


ITC-CSCC :International Technical Conference on Circuits Systems, Computers and Communications | 2002

Design and Implementation of the 16-QAM Modem for 26GHz FBWA system

Nam-il Kim; Seung-Hwan Lee; Eung-Bae Kim


Archive | 2001

Digital communication synchronization system and method thereof

Seung-Hwan Lee; Eung-Bae Kim


한국통신학회 학술대회논문집 | 2003

An Implementation of the Subscriber Station MAC Protocol in the Wireless MAN

You-Sun Hwang; Eung-Bae Kim


한국통신학회 학술대회 및 강연회 | 2003

Hardware Implementation of B-WLL System Using the developed BWA MAC Protocol Board

Chan-Bok Jeong; Seung-Kwon Baek; Nam-il Kim; Eung-Bae Kim


한국통신학회 학술대회 및 강연회 | 2002

On the Selection of the Over-Sampling Ratio of the Digital Communication Receivers

Seung-Hwan Lee; Eung-Bae Kim

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Seung-Hwan Lee

Electronics and Telecommunications Research Institute

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Ki-Cheol Han

Electronics and Telecommunications Research Institute

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Changyoul Oh

Electronics and Telecommunications Research Institute

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You-Sun Hwang

Electronics and Telecommunications Research Institute

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