• Title/Summary/Keyword: link budget

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HSDPA Sector Throughput Analysis With Modified Link Budget (Link budget을 이용한 HSDPA 시스템의 sector throughput 분식)

  • Yi Yo-Serb;Kim Sang-Bum;Hong Dae-Hyung;Jang Byung-Lyerl;Moon Soon-Joo
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.5A
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    • pp.469-474
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    • 2006
  • In this paper, we develop a method that derive the average sector throughput of HSDPA system. This proposed method reflects the effects of AMC, scheduling and multi-code transmission, and is performed by simple calculation procedures such as link budget analysis. Link budget table is used to estimate a cell coverage in general. We modify the link budget table in order to calculate C/I of the user according to the location of the user in CDMA packet system employing AMC. Furthermore, we utilize the proposed method to analyze the effects of scheduling and multi-code transmission.

Link Budget of WAVE Communication System for a Reliable ITS Service under Highway Environments (고속도로 환경에서 안정적인 ITS서비스를 위한 WAVE 통신 시스템 link budget 분석)

  • Song, Yoo-seung;Yun, Hyun-jeong
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.14 no.4
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    • pp.80-85
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    • 2015
  • The era of intelligent transportation system(ITS) has been arrived by applying information and communication technology(ICT) to the traffic. One of these technological advances is a wireless communication technology for a high speed vehicle to be connected to an infrastructure(V2I). A variety of road traffic safety services and operator comfort services are being developed by means of WAVE(Wireless Access in a Vehicular Environment) based on IEEE802.11p Standard. In this paper, the link budget is analyzed to provide a reliable quality of these ITS services. Log-distance model and two-ray model is employed for the wave propagation path loss model which is adequate for a highway environment. Reliable cell coverage is suggested for ITS services from the link budget.

An Analysis of UAV LOS Datalink at Different Geography and Weather (지형과 기후에 따른 무인기용 가시선 데이타링크 분석)

  • Lee, Hyeon-Cheol;Jo, Tae-Gyun
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.103-104
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    • 2006
  • In this paper, we analyze the UAV datalink design with calculating link budget of long-distance (200 km) Ku-band LOS wireless link. We calculate C/N of the real system and compare it with the required C/N, using the CCIR reports. In the rainy day of summer on the Korean peninsula, to maintain percent reliability 90% and BER 10^(-5) together, link budget of uplink of the system has a lot of margin at 200 km, link budget of downlink using the block turbo code is enough for distance 200 km.

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A Study on Link Budget Analysis of Wireless UWB Ranging System (무선 UWB 거리인식 시스템을 위한 Link Budget 분석에 관한 연구)

  • Roh, Jae-Sung;Shin, Yu-Sub
    • Proceedings of the Korea Information Processing Society Conference
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    • 2011.04a
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    • pp.659-661
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    • 2011
  • 최근 WPAN 분야의 솔루션인 IEEE 802.15.4a는 저소비 전력으로 통신과 거리측정을 동시에 가능케 하는 PHY 제정을 목표로 하고 있다. 본 논문은 IEEE802.15.4a 물리계층에서 사용하는 UWB 신호를 대상으로 거리인식 시스템을 위한 Link Budget을 분석한다. 거리인식 시스템의 성능은 무선 채널의 다중경로 프로파일에도 관계된다. 따라서 본 연구에서는 IEEE 802.15.4a 채널 특성인 Residential 및 Office 환경을 고려하여 거리인식 시스템을 위한 Link Budget을 분석하였으며 연구된 내용은 다양한 거리추정 방식에 적용하여 거리추정 정밀도 향상에 기여할 수 있을 것이다.

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Link Budget Analysis of Laser Retroreflector Array for KOMPSAT-5 (다목적실용위성5호 레이저반사경의 Link Budget 분석)

  • Lee, Sang-Hyun;Kim, Kyung-Hee;Lee, Jun-Ho;Jin, Jong-Han;Lim, Hyung-Chul;Park, Jong-Uk
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.36 no.1
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    • pp.92-99
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    • 2008
  • KOMSAT-5 will attach an laser retroreflector array for precise orbit determination. Laser retroreflector array was developed by DFZ in Germany and have pyramid type composed of four corner cube prisms. In this paper, the performance analyses as effective area of retroreflector and photons measured by link budget and position of ground station were performed.

A Development of Satellite Communication Link Analysis Tool

  • Ayana, Selewondim Eshetu;Lim, SeongMin;Cho, Dong-Hyun;Kim, Hae-Dong
    • Journal of Astronomy and Space Sciences
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    • v.37 no.2
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    • pp.117-129
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    • 2020
  • In a Satellite communication system, a link budget analysis is the detailed investigation of signal gains and losses moving through a channel from a sender to receiver. It inspects the fading of passed on data signal waves due to the process of spreading or propagation, including transmitter and receiver antenna gains, feeder cables, and related losses. The extent of the proposed tool is to make an effective, efficient, and user-friendly approach to calculate link budget analysis. It is also related to the satellite communication correlation framework by building up a graphical interface link analysis tool utilizing STK® software with the interface of C# programming. It provides better kinds of graphical display techniques, exporting and importing data files, printing link information, access data, azimuth-elevation-range (AER), and simulation is also possible at once. The components of the link budget analysis tool include transmitter gain, effective isotropic radiated power (EIRP), free space loss, propagation loss, frequency Doppler shift, flux density, link margin, elevation plot, etc. This tool can be useful for amateur users (e.g., CubeSat developers in the universities) or nanosat developers who may not know about the RF communication system of the satellite and the orbital mechanics (e.g., orbit propagators) principle used in the satellite link analysis.

Passive UHF RFID Propagation Characteristics and Reconsideration of Link budget on Practical Communication Area (수동형 UHF RFID 인터페이스에 대한 Link budget의 재해석 및 전파 환경 요소 분석)

  • Jung, Jin-Woo;Park, Kyoung-Tae;Roh, Hyoung-Hwan;Park, Jun-Seok;Kim, Hyeong-Seok
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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    • pp.469-472
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    • 2008
  • In this paper, we discuss the recent trends on the passive UHF RFID tag chip design techniques and several important system parameters. We also summarize link budget studies on both conventional and modem UHF RFID communications. The paper highlights the reverse link limited case, which has known to be the minor concern if reader continuous wave (CW) can reach the tag in sufficient level. This makes sense when the tag sensitivity is rather high (over 10-12${\mu}W$); however, since the tag chip fabrication technologies have been developed by time, the tag chip threshold levels are now less-dominant in determining link margin. If the tag limitation can be alleviated, the forward link limited case can be resolved; thus, we rather focus on the path-loss problem. Since the path-losses are still exist in both forward and reverse links, and it can be doubled while CW travels the reader-tag-reader path because forward link and reverse link are on the same distance. Consider if reader receiver sensitivity is very high in the worst case. In this case, weaken tag response (i.e., backscatters) cannot reach the level that reader receiver can process tag data; bit-error rate can be higher. Overall, backscatter levels should be high enough so that reader receiver can correctly function. After discussing link budget, we carried out practical measurements on fading effects between two circularly polarized UHF RFID antennas in a small scale area.

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Data Rate Analysis Using the Link Budget and Lunar Exploration Case Studies (달 탐사 사례 분석과 링크버짓 이용한 데이터 전송속도 분석)

  • Moon, Sang-Man;Kim, In-Kyu
    • Aerospace Engineering and Technology
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    • v.13 no.1
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    • pp.108-119
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    • 2014
  • In this paper, through the example of international lunar exploration mission the equipment was to investigate, and the amount of data transferred per day were identified. Data storage and the data transfer rate (8.4Mbps less) for the satisfaction of the value within the range of available S and X bands was confirmed by using the communication link budget. The result is to define the range of the sensor information can be obtained, as well as from the values of the parameters calculated for the transmission communication systems will be able to define the specifications.

28 GHz Wireless Backhaul Transceiver Characterization and Radio Link Budget

  • Leinonen, Marko E.;Destino, Giuseppe;Kursu, Olli;Sonkki, Marko;Parssinen, Aarno
    • ETRI Journal
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    • v.40 no.1
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    • pp.89-100
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    • 2018
  • Millimeter wave communication is one of the main disruptive technologies in upcoming 5G mobile networks. One of the first candidate applications, which will be commercially ready by 2020, is wireless backhaul links or wireless last mile communication. This paper provides an analysis of this use-case from radio engineering and implementation perspectives. Furthermore, preliminary experimental results are shown for a proof-of-concept wireless backhaul solution developed within the EU-KR 5GCHAMPION project, which will be showcased during the 2018 Winter Olympic Games in Korea. In this paper, we verify system level calculations and a theoretical link budget analysis with conductive and radiated over-the-air measurements. The results indicate that the implemented radio solution is able to achieve the target key performance indicator, namely, a 2.5 Gbps data rate on average, over a range of up to 200 m.

Hardware Design and Deployment Issues in UHF RFID Systems

  • Jang, Byung-Jun;Yoon, Hyun-Goo;Lim, Jae-Bong
    • Journal of electromagnetic engineering and science
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    • v.9 no.1
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    • pp.39-45
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    • 2009
  • In this paper, we discuss hardware design and deployment issues in current passive UHF RFID systems. Using the link budget concept, the methodology to calculate forward- and reverse-link interrogation range is shown. Then, we consider hardware issues: phase diversity, phase noise with range correlation, and TX leakage problems. Finally, three interference problems when deploying RFID systems are presented.