Yeong Seob Jeong

Deadlock-free XY-YX router for on-chip interconnection network

Specifically, based on the observation that a response is always preceded by a request in multi-processor SoCs, this letter proposes a novel deadlock-free XY-YX router for on-chip network performance improvement. In order to avoid deadlock, we add additional physical channels in the horizontal direction and optimize the priority of output channel allocation. Simulation results show the enhancement in the throughput of an NoC.

Intra-Body Communication for Personal Area Network

The intra-body communication uses the human body as a conducting wire, providing the simplicity and the security. Although the communication distance is limited within a body-area, it is useful on the construction of personal area network. In this paper, we introduce our prototype intra-body communication module using the FPGA. The proposed system has the FSK modulator and the demodulator. These modulation methods are chosen after body-channel analysis. The experimental results demonstrate the feasibility of our intra-body communication module for establishing the PAN (Personal Area Network).

In-Time Transaction Accelerator Architecture for RDBMS

In this paper, we propose a hardware architecture for in-time transaction accelerator that reduces the bottlenecks between the DB server and the DB storage in margin FX trading system’s RDBMS (Relational Database Management System). In-time transaction accelerator located between the DB server and the DB storage analyzes and processes the queries used for margin FX trading system by co-processing of the CPU and the FPGA. The accelerator analyzes the patterns and the consistency of the queries to reduce the total database access in order to increase the RDBMS’s throughput.

SDRAM Controller for Retention Time Analysis in Low Power Signal Processor

The SDRAM requires the refreshing at every refresh time to maintain the data, and this operation consumes power. Because the power consumption of the processor is decreased, the power cosnumption on the SDRAM is taking large portion of the total power consumption. The refresh time can be expanded because the retention time and power consumption can be changed. In this paper we introduce the SDRAM controller which enables the analysis of the retention time for the power redectoin purpose.

Foot Motion Recognition for Human–Computer Interaction

In this paper, we introduce a foot motion recognition system for the human–computer interaction. Our system consists of five pressure sensors in a shoe, 3-axis acceleration sensor in the front of the shoe, and signal processing unit on FPGA. Bluetooth establishes the wireless communication channel between our system and a host PC. Experimental results demonstrate the feasibility of our proposal for human–computer interaction, by providing full control of the host PC though the foot motion recognition.

Hardware Overhead vs. Performance of Matrix Multiplication on FPGA

Matrix multiplication requires a large number of operations, demanding for high performance computing. In order to complete the matrix multiplication in one clock cycle, a designer can utilize multiple multipliers. However, this approach is inefficient in terms of hardware area and power consumption. Therefore, it is important to find out the way to complete the multiplication that is fast and uses hardware resources properly. In this paper, we introduce the way to reduce the number of multipliers and provide the hardware overhead and performance of matrix multiplication on FPGA.

Ambulatory Pattern Extraction for U-Health Care

The incorrect ambulatory habit affects our body temporarily as well as permanently. In this paper we propose Ambulatory Remedial Clinic Helper (ARCH), shoes detecting wrong ambulatory habit. It is easy to let patients know strange signals promptly after getting & analyzing the data of them in everyday life. ARCH system uses pressure sensors and 3-axis acceleration sensor to measure degree of wrong ambulatory habit and report the acquired data to host PC. By implementing this system, we can check the ambulatory pattern in real time, ward off plenty of foot diseases, and prevent deterioration of the existing foot problems.