Ho-Kyung Son

Coexistence of Korea's DVB-T2 and Japan's ITS using 700MHz frequency band

In this paper, we analyze the effects of interference between Koreas ultra-high definition TV broadcasting system and Japans intelligent transport system using the 700 MHz frequency band when considering a practical deployment of both systems. We performed Minimum Coupling Loss (MCL) method to evaluate how much interference from the Korean UHDTV system is imposed on the Japan ITS system. We also employ the Advanced Propagation Model (APM) and ITU-R P. 452-15 model to calculate the propagation loss occurring in ducts. Our study can be applied to the deployment planning for each system with an interference impact acceptable to both parties.

Interference analysis between Korea's DVB-T2 and Japan's ITS using 700MHz frequency band

In this paper, we analyze the effects of interference between Koreas ultra-high definition TV broadcasting system and Japans intelligent transport system using the 700 MHz frequency band when considering a practical deployment of both systems. We performed Minimum Coupling Loss (MCL) method to evaluate how much interference from the Korean UHDTV system is imposed on the Japan ITS system. We also employ the Advanced Propagation Model (ApM) and ITU-R P. 452-15 model to calculate the propagation loss occurring in ducts. To protect against interference between Korean and Japanese radio signals, the required additional attenuation loss is also calculated.

Interference analysis from LPR into BSDS using geographical model

In this paper, we evaluate the interference effect of LPR on BSDS in 24.05-24.25 GHz band. The geographical model for the analysis is used and the dynamic simulation is performed, taking into account real environment. The results show that the received interfered power from LPR depends on the separate distance along the road and relative position. It is, also, realized that an appropriate location and pattern of the LPRs antenna may mitigate the interference to BSDS. This result could be used for planning LPR installation and also find out a suitable radiation pattern.

Analysis of interference effects between LTE user terminals

This paper evaluates the interference effect between LTE user equipment using adjacent frequency band. Interference scenario and analytic methodology are established when considering real user distribution. We performed Monte-Carlo simulations in terms of throughput loss to evaluate interference effects on the LTE user equipment by the other LTE UEs. This methodology and results can be used to derive technical criteria for frequency sharing with an acceptable interference each other.

Derivation of Probability Density Function of Signal-to-Interference-Plus-Noise Ratio for the MS-to-MS Interference Analysis

This paper provides an analytical derivation of the probability density function of signal-to-interference-plus-noise ratio in the scenario where mobile stations interfere with each other. This analysis considers cochannel interference and adjacent channel interference. This could also remove the need for Monte Carlo simulations when evaluating the interference effect between mobile stations. Numerical verification shows that the analytical result agrees well with a Monte Carlo simulation. Also, we applied analytical methods for evaluating the interference effect between mobile stations using adjacent frequency bands. The analytical derivation of the probability density function can be used to provide the technical criteria for sharing a frequency band.

Analysis of Radio Interference through Ducting for 2.5 GHz WiMAX Service

Radio interference has been occurring in mobile communication services on the southern seashore in Korea. Monitoring the radio interference signal revealed that the main reason for the radio interference was a radio ducting signal coming from the seaside of Japan. In this paper, we have analyzed the effect of interference on WiMAX service using a 2.5 ㎓ frequency band between Korea and Japan. We focus on the interference scenario from base station to base station and we use the Minimum Coupling Loss (MCL) method for interference analysis and the Advanced Propagation Model (APM) for calculating the propagation loss in ducts. The propagation model is also compared with experimental measurement data. We confirm that the interfering signal strength depends on the antenna height and this result can be applied to deployment planning for each system with an interference impact acceptable to both parties.

Analytic model for the evaluation of the interference effect on mobile WiMax system by DAA devices

This paper evaluates the interference effect on the Ultra-wideband (UWB) devices with Detect and Avoid (DAA) function on the WiMAX system. For this, an analytic model based on the Monte-Carlo method is proposed and we simulate about some scenario using the model. The result shows that the DAA function of UWB device can reduce the interference probability and this probability depends on the cell radius and number of the UWB device having the DAA function. This analytic model could be used for assigning a frequency to new wireless system without an unacceptable interference impact from DAA devices.

Model for analysis of interference effect from BSDS into RVD

This paper evaluates the interference effect from Blind Spot Detection System (BSDS) into Radar Vehicle Detector (RVD) in 24.05–24.25 GHz band. For this, the geographical model for the analysis is proposed and the Monte-Carlo dynamic simulation for aggregate case is performed. The simulation results show that the received interfered power from many BSDS depends on the distance along the road and the time. We learn that an appropriate location of the RVD antenna is helpful to mitigate the interference from BSDS. This geographical model could be used for planning RVD deployment without an unacceptable interference impact from BSDS.