• Title/Summary/Keyword: 디지털 다운 컨버터

Search Result 7, Processing Time 0.029 seconds

A Block FIR Filtering Architecture for IF Digital Down Converter (IF 디지털 다운 컨버터의 블록 FIR 필터링 아키텍처)

  • Jang, Young-Beom
    • Journal of the Institute of Electronics Engineers of Korea SP
    • /
    • v.37 no.5
    • /
    • pp.115-123
    • /
    • 2000
  • In this paper, a block FIR(Finite Impulse Response) filtering architecture is proposed for IF digital down converter. Digital down converter consists of digital mixers. decimation filters and down samplers. In this proposed structure, it is shown that a efficient parallel decimation filter architecture can be produced by cancellation of inherent up sampling of the block filter and following down sampler Furthermore. it is shown that computational complexity of the proposed architecture is reduced by exploiting the block FIR structure and zero values of the digital mixers.

  • PDF

A Low-power Digital Down Converter Architecture Using Interpolated IIR Filters (Interpolated IIR 필터를 사용한 저전력 디지털 다운 컨버터 아키텍처)

  • 장영범
    • Proceedings of the IEEK Conference
    • /
    • 2000.11d
    • /
    • pp.127-130
    • /
    • 2000
  • This paper proposes a low-Power DDC(Digital Down Converters) architecture for IF(Intermediate frequency) signal processing. It is shown that concept of conventional interpolated FIR filters can be expanded to IIR filters for DDC applications. Also in the paper, power dissipations for the proposed architecture and conventional ones are estimated.

  • PDF

Implementation of European Digital Radio Analyzer for In-Band Frequency (유럽형 In-Band 디지털 라디오 분석기 구현)

  • Kim, Seong-Jun;Kwon, Ki-Won;Park, Kyung-Won;Lee, Min-Soo
    • Proceedings of the Korean Society of Broadcast Engineers Conference
    • /
    • 2011.11a
    • /
    • pp.23-24
    • /
    • 2011
  • 아날로그 TV의 디지털화와 마찬가지로 아날로그 라디오 방송의 디지털화도 세계적인 추세이다. DRM(Digital Radio Mondiale)은 송신소의 위치, 방송 지역 및 사용하는 주파수에 따라, 동작모드가 A~E까지 5가지가 있으며, 모드 A~D는 30MHz이하 대역의 디지털 라디오 방송에 사용되는 모드이며, 모드 E는 Band I~II 대역의 디지털 라디오 방송에 사용되는 모드이다. 본 논문에서는 DRM 모드 A~E까지의 신호를 수신 및 분석 가능한 USB 타입 DRM 수신기 구현에 관하여 정리하였다. 대역 필터 및 디지털 다운 컨버터가 DSP를 이용하여 구현되었으며 PC Side에서 DRM 신호를 분석할 수 있도록 설계되었다.

  • PDF

The Implementation of DDC for the WLAN Receiver (WLAN 수신기를 위한 Digital Down Converter (DDC) 구현)

  • Jeong, Kil-Hyun
    • Journal of the Korea Society of Computer and Information
    • /
    • v.17 no.2
    • /
    • pp.113-118
    • /
    • 2012
  • In this paper, we discuss the design of the Digital Down Converters for the IEEE 802.11 wireless LAN receiver, which can be used for the customized receiver. The customized receiver can be used for special puropsed services which cannot be realized using the general custom chip. In the OFDM receiver, DDC receives the up sampled Inphase/Quadrature signal from the AD converter and process down sampling and filtering procedures using the Cascaded Intergrator Filter and FIR filters. We discuss the structure and design methodology of DDC's and analyze the simulation results.

Design of Synchronization Algorithms for Burst QPSK Receiver (버스트 QPSK 수신기의 동기 알고리즘 설계)

  • 남옥우;김재형
    • Journal of the Korea Institute of Information and Communication Engineering
    • /
    • v.5 no.7
    • /
    • pp.1219-1225
    • /
    • 2001
  • In this Paper we describe the design of synchronization algorithms for burst QPSK receiver, which are applicable to BWLL uplink. The demodulator consists of digital down converter, matched filter and synchronization circuits. For symbol timing recovery we ufo Gardner algorithm. And we use forth power method and decision directed method for carrier frequency recovery and phase recovery, respectively. For the sake of performance analysis, we compare simulation results with the board implemented by FPGA which is APEX20KE series chip for Alter. The performance results show it works quite well up to the condition that a frequency offset equal to 4.7% of symbol rate.

  • PDF

A study on the design and implementation of uplink receiver for BWLL Base Station modem (광대역 무선가입자망 기지국용 모뎀의 상향링크 수신기 설계 및 구현에 관한 연구)

  • 남옥우;김재형
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
    • /
    • 2001.10a
    • /
    • pp.307-310
    • /
    • 2001
  • In this paper we describe the design and implementation of uplink receiver for BWLL base station modem. The demodulator consists of digital down converter, matched filter and synchronization circuits. For symbol timing recovery we use Gardner algorithm. And we use forth power method and decision directed method for carrier frequency recovery and phase recovery, respectively. For the sake of performance analysis, we compare simulation results with the board implemented by FPGA which is APEX20KE series chip for Alter. The performance results show it works quite well up to the condition that a frequency offset equal to 4.7% of symbol rate.1

  • PDF

Develop physical layer analysis algorithm for OFDMA signal based IEEE 802.16e (IEEE 802.16e 기반 OFDMA 물리층 분석 알고리즘 연구)

  • Jang, Min-Ki
    • Journal of the Korea Academia-Industrial cooperation Society
    • /
    • v.20 no.6
    • /
    • pp.342-349
    • /
    • 2019
  • We describe and anlayzes the methodology and implementation results of H / W configuration and signal characteristics analysis algorithm for analyzing equipment for analyzing OFDMA physical layer based on 802.16e. Recently, demand for signal analysis of instruments that analyze these signals with the development of digital communication signals is rapidly increasing. Accordingly, it is necessary to develop signal analysis equipment capable of analyzing characteristics of a broadband communication signal using a wideband digital signal processing module. In this paper, we have studied the basic theory of OFDMA in order to devise a device capable of analyzing characterisitcs of broadband communication signals. Second, the structure of OFDMA transmitter/receiver was examined. Third, a wideband digitizer was implemented. we design Wimax signal analysis algorithm based on OFDMA among broadband communication methods and propose Wimax physical layer analysis S/W implementation through I, Q signals. The IF downconverter used the receiver module and the LO generation module of the spectrum analyzer. Quantitative analysis result is obtained through the algorithm of Wimax signal analysis by I, Q data.