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수중 초음파 통신을 위한 적응형 BPSK 복조기의 DSP 구현
전재국(Jae-Kuk Jeon),박찬섭(Chan-Sub Park),주형준(Hyung-Jun Joo),김기만(Ki-Man Kim) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
The performance of a digital baseband signal processing and data transmission rate depends on the modulation technique. In this paper, We implemented DSP communication system for Underwater acoustic communication using by adaptive BPSK modem technique. In order to implement adaptive modem, we suggested SNR detection block. SNR detection block has the reference SNR value that selects between window filter path and matched filter path. In this paper, suggested system is based on software interface and all Hardware(PLL, modem filter, equalizer etc) is implemented by software, exclusive of DSP, A/D, D/A converter, SDRAM and Flash memory.
전재국(Jae-Kuk Jeon),박찬섭(Chan-Sub Park),주형준(Hyung-Jun Joo),김기만(Ki-Man Kim) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
The performance of a digital baseband signal processing and data transmission rate depends on the modulation technique. In this paper, We implemented DSP communication system for Underwater acoustic communication using by adaptive BPSK modem technique. In order to implement adaptive modem, we suggested SNR detection block. SNR detection block has the reference SNR value that selects between window filter path and matched filter path. In this paper, suggested system is based on software interface and all Hardware(PLL, modem filter, equalizer etc.) is implemented by software, exclusive of DSP, A/D, D/A converter, SDRAM and Flash memory.
핸즈프리 통신을 위한 다중채널 음성픽업 임베디드 시스템 설계
주형준,박찬섭,전재국,김기만,Ju, Hyng-Jun,Park, Chan-Sub,Jeon, Jae-Kuk,Kim, Ki-Man 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.2
In this paper we propose a multi-channel speech pickup system for calling quality enhancement of hands-free communication using ALTERA Nios-II processor. Multi-channel speech pickup system uses Delay-and-Sum beamformer with zero-padding interpolator. This paper implements speech pickup system using the Nios-II processor with real-time I/O data processing speed. The proposes speech pickup embedded system shows a good agreement with those of computer simulation(MATLAB) and conventional DSP processor(TMS320C6711) result. The proposed method is effective more than previous methods in cost and design processing time. As a result, LE(Logic Element) of hardware used 3,649/5,980(61%) on a chip. 본 논문에서는 핸즈프리 음성 통신의 통화 품질 개선을 위해 ALTERA Nios-II 임베디드 프로세서를 이용하여 다중채널 음성 픽업 시스템을 구현하였다. 다중채널 음성 픽업 시스템은 zero-padding을 포함한 보간기를 갖는 지연-합 빔 형성기를 이용하였다. 구현된 음성 픽업 임베디드 시스템은 컴퓨터 시뮬레이션(MATLAB)과 범용 DSP 프로세서(TMS320C6711)을 이용하여 처리한 결과와 일치하였다. 구현된 방법은 비용과 설계시 간 측면에서 이전의 설계 방법들보다 효율적이다. 설계 결과로써 하드웨어의 LE(Logic Element)는 칩 상에서 3,649/5,980(61%)을 사용하였다.
FPGA를 이용한 다중 채널 음성 픽업 시스템 설계에 관한 연구
주형준(Hyung-jun Ju),전재국(Jae-kuk Jeon),김세영(Se-young Kim),김기만(Ki-man Kim) 한국마린엔지니어링학회 2005 한국마린엔지니어링학회 학술대회 논문집 Vol.2005 No.-
Recently the telematics system is used widely. Users want to high quality communications. Since the primary advantage of using an array is to enhance a desired signal and reject jamming interferences, array signal processing is essential to satisfy unmet demand of user. In general, beamforming is a spatial filtering operation performed on the data received by an array of sensors. So we propose the beamformer design that use FPGA for real time processing. And we use zero-padding interpolation for high resolution data.