Transmission Experiments on Slow-FH/16QAM System for Land Mobile Communications(Special Issue on Third Generation Land Mobile Communication Systems)
スポンサーリンク
概要
- 論文の詳細を見る
A slow frequency-hopping/16-aryquadrature amplitude modulation(slow-FH/16QAM)system based on time-division-multiple-access(TDMA)is appropriate for third-generation land mobile cellular communications because of its high immunity to interference. The system uses 16QAM for high spectral efficiencyand slow-FH and forward-error-correction(FEC)for high-quality transmission.To reduce sensitivity to interference, the system uses an improved decodingscheme based on a minimum Euclidean-distance which is effective when the interference level is dispersed by FH. The bit error rate(BER)of the system due to interference has been evaluated in a previous study, both theoreticallyand by computer simulation. Although computer-simulated results showed thatthe system improved the BER, the hardware feasibility was not considered. This paper presents a hardware implementation of the system and the results of experimental transmission using equipment we developed to verify the system and to confirm the BER performance. The laboratory experimental reults indicated that the system could provide high-quality transmission over a channel that has frequency-selective fading and co-channel interference. This system provided an E_b/N_o of 9dB with space diversity and one of 15dB without it, when BER=10^-3 and f_d=120Hz. Fieldexperiments were also conducted in a suburban area of Tokyo to demonstrate the BER performance. The results meantthat the system could lower sensitivity to vehicle velocity more than a system without FH and that the BER performance of the system was improved notably against that of a system without FH, especially at low vehicle velocity.
- 社団法人電子情報通信学会の論文
- 1998-07-25
著者
-
Hamaguchi K
National Inst. Information And Communications Technol. (nict) Yokosuka‐shi Jpn
-
Hamaguchi Kiyoshi
Communications Research Laboratory Independent Administrative Institution
-
Kamio Yukiyoshi
Communications Research Laboratory Independent Administrative Institution
-
Kamio Yukiyoshi
The Communication Research Laboratory
-
Sasaoka Hideichi
The Communications Research Laboratory Ministryof Posts And Telecommunications
-
Kamio Y
National Inst. Information And Communications Technol. (nict) Yokosuka‐shi Jpn
-
MORIYAMA Eimatsu
Communications Research Laboratory, Independent Administrative Institution
-
HAMAGUCHI Kiyoshi
the Communications Research Laboratory, Ministry of Posts and Telecommunications
-
MORIYAMA Eimatsu
the Communications Research Laboratory, Ministry of Posts and Telecommunications
-
Moriyama E
Communications Research Laboratory Independent Administrative Institution
関連論文
- B-5-63 Imbalanced Received Power Effect of Polarization Based Antenna-Phase Controlled SDM/OFDM System
- Design and Performance of a Millimeter-Wave Video-Transmission System Using 60-GHz Band for Indoor BS Signals Transmission(Special Issue on Millimeter-Wave Circuit and Fabrication Technologies Opening up the 21st Century)
- Downlink Beamforming Method for Multimedia CDMA/TDD Systems
- Performance Evaluation of Base Station Antenna Arrays Using Common Correlation Matrix for W-CDMA System under Multipath Fading Environment(Special Section on Spread Spectrum Techniques and Applications)
- Adaptive Modulated OFDM Radio Transmission Scheme Using a New Channel Estimation Method for Future Broadband Mobile Communication Systems(Regular section)
- A CMA Adaptive Array Antenna System with a Single Receiver Using Time-Division Multiplexing
- Multimode Software Radio System by Parameter Controlled and Telecommunication Component Block Embedded Digital Signal Processing Hardware(Special Issue on Software Defined Radio and Its Technologies)
- Development of Narrow-Band Digital Land Mobile Radio
- Transmission Experiments on Slow-FH/16QAM System for Land Mobile Communications(Special Issue on Third Generation Land Mobile Communication Systems)
- Implementation of and Field Experiment on High-Speed Multimedia Multimode TDMA Radio Transmission Systems(Special Issue on Third Generation Land Mobile Communication Systems)
- Field Experiments on 16QAM/TDMA and Trellis Coded 16QAM/TDMA Systems for Digital Land Mobile Radio Communications (Special Issue on Personal, Indoor and Mobile Radio Communications)
- A Feasibility Study of the 16QAM-OFDM Transmission Scheme for Multimedia Mobile Access Communication Systems
- High Speed Multimedia-Multimode TDMA Radio Transmission System for IMT-2000(Special Issue on Third Generation Land Mobile Communication Systems)
- Adaptive Modulation System with Punctured Convolutional Code for High Quality Personal Communication Systems (Special Issue on Advanced Adaptive Radio Communication Technologies)
- An Overview of Recent Propagation Studies for Land Mobile Communications (Special Issue on Land Mobile/Portable Propagation)
- A Low-Cost and Stable Millimeter-Wave Transmission System Using a Transmission-Filter-Less Double-Side-Band Millimeter-Wave Self-Heterodyne Transmission Technique(Communication Devices/Circuits)