[논문]An Investigation of Satellite Radio Access Technology for Beyond IMT-2000 Systems

Kang Kunseok; Ryoo Sunheui; Kim Byoung Gi; Kim Sooyoung; Ahn Do Seob

doi:10.1109/jcn.2005.6387861

An Investigation of Satellite Radio Access Technology for Beyond IMT-2000 Systems 원문보기

Journal of communications and networks, v.7 no.2, 2005년, pp.135 - 143

Kang Kunseok (Digital Broadcasting Research Division of Electronics and Telecommunications Research Institute) , Ryoo Sunheui (Digital Broadcasting Research Division of Electronics and Telecommunications Research Institute) , Kim Byoung Gi (Digital Broadcasting Research Division of Electronics and Telecommunications Research Institute) , Kim Sooyoung (Division of Electronics and Information Eng., Chonbuk National University) , Ahn Do Seob (Digital Broadcasting Research Division of Electronics and Telecommunications Research Institute)

Abstract ▼ AI-Helper

This paper presents an investigation of satellite radio access technology for beyond IMT-2000 systems. Although we could not see any active role of a satellite system in the 3G networks, satellite system will provide strong advantages in future systems for certain applications. Because a satellite link has longer round trip delay than a terrestrial link, we need technologies that would make the satellite component especially efficient. After presenting the satellite radio interface of the 3G system, we suggest several points which need to be considered in the beyond 3G systems. We also suggest a few candidate technologies with various simulation results.

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제안 방법

The TPC commands are generated by the following rule. At first, let us define the power control error of △方=SIRest — S IRtarget + eloop delays where △切<項 delay and SIRes± denote the prediction for the amount of SIR increment/decrement of the received downlink CPICH and the estimated SIR of the received downlink DPCCH during the next time interval equal to the loop delay, respectively. Therefore, △姑即 delay is added to SIRest to result in the predicted SIR value of SIRest, pred- In other words, we employed a simple algorithm for the calculation of
8 are based on the 3D block turbo codes. In the proposed scheme, we first apply the adaptive coding scheme with the RC code based upon the given channel quality information (CQI). Therefore, we send the most appropriate code to the CQI at the first transmission instead of sending the highest rate code as in the conventional H-ARQ scheme.
In this section, we reinvestigate the satellite specified technologies in the SAT-CDMA in order to tailor the target satellite system in GEO. If we change the satellite orbit to GEO at an altitude of about 35, 800 km from LEO, we will have much longer RTD.

이론/모형

In the terrestrial STTD scheme, we assume perfect channel estimation. In the simulation results we used a tapped delay line multi-path fading models [6], [19]. For the terre아rial channel, we used Rayleigh fading at the multi-paths, and for the satellite channel we used Rician fading with various Rician factors of K at the first path with line of sight condition.

참고문헌 (21)

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Recommendation ITU-R M.1457, 'Detailed specifications of radio interfaces of IMT-2000,' 2001
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원문보기 상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
L. Mucchi et aI., 'Space-time MMSE reception in multi-satellite UMTS,' in Proc. GLOBECOM 2003, vol. 2, Dec. 2003, pp. 1163-1167
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DOI : 10.1109/JCN.2005.6387861 [무료]
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