Seok-Jin Lee

An architecture for wireless LAN/MAN packet processor [mobile radio applications]

The mode transition between receiving a frame and transmitting the response is the usual operation in a TDD system. The transition time is strictly limited. This paper is intended to gain an insight into the time latency at the turn around time. And we propose a simplified new architecture which is adapted to the MAC processor in a broad band wireless TDD system for wireless LAN/MANs.

Energy efficiency of a wireless communication transmitter with intensity modulation

This paper describes a high speed optical wireless communication link that uses white-light-emitting diodes. We investigate the driving architecture about the energy efficiency of LED lightings and the spectral efficiency of communications.

Processing Acceleration of Broadband Wireless MAC in a Portable Terminal

Among the broadband wireless communication standards utilized to satisfy the demand for multimedia services, time division duplexing (TDD) is satisfactory for the asymmetric data transmission emphasized in Internet services. In this system, the transition between receiving a frame and transmitting a response must be bounded for an effective use of radio resources. However, the minimized inter-frame space-time requires high processing power. The aim of the present paper is to gain insight into the time latency at the turn-around time of a TDD operation. We also propose a simplified new processor, which is a terminal device-friendly architecture that includes prediction and preparation to support processing of burst-type traffic.