Seungkeun Park

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This letter presents a joint approach to the symbol-error probability (SEP) of coherent -ary phase-shift keying in a situation where the phase error, quadrature error, and in-phase–quadrature (I-Q) gain mismatch problems take place all concurrently over an additive white Gaussian noise and arbitrary fading channel. A set of equations that characterizes the(More)
We present a sensor fusion system using lidar and camera. We separate the system into two part which is hypothesis generation part and hypothesis verification part. These parts use different single sensors. Hypothesis generation is done using the lidar and hypothesis verification is done using the camera image. In hypothesis generation, we cluster the lidar(More)
Recently, it is highly issued to extend wireless communication service on licensed band to unlicensed band as a part of effective utilization of the limited spectrum resources. Because Wi-Fi service is widely used in the targeted unlicensed band, the co-existence performances of Wi-Fi with the wireless communication service should be investigated. In this(More)
For the effective utilization of the limited spectrum resources, it comes into the spotlight to extend the frequency band of wireless communication services such as LTE to unlicensed band. Because Wi-Fi service is widely used in the concerned band, the performance of co-existence should be investigated. Several methods for sharing spectrum are considered(More)
This paper describes the performance analysis of several existing backoff algorithms in terms of achievable throughput and short-term fairness. Through the performance evaluations conducted by the event-driven simulator we show the tradeoff of the maximum achievable throughput and short-term fairness. According to our investigations controlling the growth(More)