# An Enhanced Approach for a Prediction Method of the Propagation Characteristics in Korean Environments at 781 MHz

• Jung, Myoung-Won (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
• Kim, Jong Ho (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
• Choi, Jae Ick (Broadcasting & Telecommunications Convergence Research Laboratory, ETRI) ;
• Kim, Joo Seok (Department of Electrical Engineering, Chungbuk National University) ;
• Kim, Kyungseok (Department of Electrical Engineering, Chungbuk National University) ;
• Pack, Jeong-Ki (Department of Electrical Engineering, Chungnam National University)
• Accepted : 2012.10.15
• Published : 2012.12.31

#### Abstract

In high-speed wireless communications, an analysis of the propagation characteristics is an important process. Information on the propagation characteristics suitable for each environment significantly helps in the design of mobile communications. This paper presents the analysis results of radio propagation characteristics in outdoor environments for a new mobile wireless system at 781 MHz. To avoid the interference of Korean DTV broadcasting, we measure the channel characteristics in urban, suburban, and rural areas on Jeju Island, Republic of Korea, using a channel sounder and $4{\times}4$ antenna. The path loss (PL) measurement results differ from those of existing propagation models by more than 10 dB. To analyze the frequency characteristics for Korean propagation environments, we derive various propagation characteristic parameters: PL, delay spread, angular spread, and K-factor. Finally, we verify the validity of the measurement results by comparing them with the actual measurement results and 3D ray-tracing simulation results.

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