• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1991.10a
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• pp.159-162
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• 1991

본 논문에서는 한국전기통신공사에서 도입 추진하고 있는 No.7 공통선 신호방식의 망관리를 위하여 사용될 OMAP의 구성과 기능에 대하여 소개하였다. 국내에서는 아직 공통선 신호방식이 상용화 되지않았으며, 그 관련 기준들도 확정되지 않았으며, 더구나 운용유지보수관리를 위한 OMAP에 대해서는 프로토콜 범위조차 확고히 정립되지 않은 상태이다. 따라서 본 고에서는 THN과 OMAP의 관계를 살펴봄으로써 THN을 구성하기 위하여 필요한 국내의 OMAP 구성방안을 제시하여, OMAP의 프로토콜 정립과 OMAP을 이용한 관련 시스팀들의 구현에 방향을 제시하고자 한다.

• Journal of Korea Society of Digital Industry and Information Management
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• v.8 no.1
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• pp.117-123
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• 2012

This paper implements mobile Worldwide Interoperability for Microwave Access (WiMAX) receiver using Software Defined Radio (SDR) technology. SDR system is difficult to implement on the mobile handset because of restrictions that are computing power and under space constraints. The implemented receiver processes mobile WiMAX software modem on Open Multimedia Application Platform (OMAP) System on Chip (SoC) and Field Programmable Gate Array (FPGA). OMAP SoC is composed of ARM processor and Digital Signal Processor (DSP). ARM processor supports Single Instruction Multiple Data (SIMD) instruction which could operate on a vector of data with a single instruction and DSP is powerful image and video accelerators. For this reason, we suggest the possibility of SDR technology in the mobile handset. In order to verify the performance of the mobile WiMAX receiver, we measure the software modem runtime respectively. The experimental results show that the proposed receiver is able to do real-time signal processing.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1992.06a
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• pp.246-249
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• 1992

• Proceedings of the Korean Information Science Society Conference
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• 2005.07a
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• pp.355-357
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• 2005

본 논문에서는 멀티미디어 데이터 전송시, 오디오와 비디오 데이터를 효율적으로 동기화 시키는 방법에 대해서 설명한다. 본 연구에서는 간단한 구조와 적은 연산량으로 동기화 알고리즘을 구현하여 내장형 시스템을 위한 프로세서에 적합하도록 고정 소수점으로 구현하는 방법을 얻게 되었다. OMAP 1510과 MSM5500으로 이루어진 화상 전화 단말기를 이용하여 실험한 결과 만족스러운 결과를 얻을 수 있었다.

• International Journal of Highway Engineering
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• v.15 no.6
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• pp.41-47
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• 2013

PURPOSES : The purpose of this study is about noise which is generated from roads and is consist of irregular frequency variation from low frequency to various band. The existing methods of noise reduction are sound barrier that uses insulation material and absorbing material or have applied passive technology of noise reduction by devices. The total frequency band is needed to apply active noise control. METHODS : In this study applies to the field of road traffic environment, signal processing controller and various analog signal input/output, the amplifier module is based on parallel-core embedded processor designed. DSP performs the control algorithm of the road traffic noise. Noise sources in the open space performance of evaluation were applied. In this study, controller of active signal processor was designed based on the module of audio input/output and main controller of embedded process. The controller of active signal processor operates noise reduction algorithm and performance tests of noise reduction in inside and outside environment were executed. RESULTS : The signal processing controller with OMAP-L137 parallel-core processors as the center, DSP processors in the active control operations dealt with quickly. To maximize the operation speed of an object and ARM processor is external function keys and display for functions and evaluating the performance management system was designed for the purpose of the interface. Therefore the reduction of road traffic noise has established an electronic controller-based noise reduction. CONCLUSIONS : It is shown that noise reduction is effective in the case of pour tonal sound and complex tonal sound below 500Hz by appling to Fx-LMS.