Mohd Hafiz Sulaiman

A survey of fault-tolerant processor based on error correction code

Fault detection and correction algorithms has been widely adopted in the various data communication system with view to protect the system from crashing due to hard and soft errors. As the system becomes more complex with the reduction of transistor size, fault detection and correction schemes are not limited to data transfer process. Internal components of the systems processor are also susceptible to soft errors that potentially would halt the system operation. This paper is focused on the current implementation of error correction code (ECC) on internal processor architecture. Various ECC algorithms are discussed from theory to its operation. Several researches that implemented ECC in processor architecture are also presented in order to demonstrate the variety of ECC execution to the processor architecture. A custom soft-core processor called UTEMRISC is presented as a study case to execute an ECC algorithm in low-end soft-core processor architecture on FPGA platform. For future work, the FT design will be embedded in UTeMRISC03 processor with further analysis of the fault assessment on each of the processors components.

OPTICAL SWITCHING CONTROLLER USING FPGA AS A CONTROLLER FOR OCDMA ENCODER SYSTEM

This paper proposed a design of optical switching controller using FPGA for OCDMA encoder system. The encoder is one of the new technologies that use to transmit the coded data in the optical communication system by using FPGA and optical switches. It is providing a high security for data transmission due to all data will be transmitting in binary code form. The output si gnals from FPGA are coded with a binary code that given to an optical switch before it signal modulate with the carrier and transmit to the receiver. In this paper, AA and 55 data were used for source 1 and source 2. It is generated sample data and sent packet dat a to the FPGA and stored it into RAM. The simulation results have done by using software Verilog Spartan 2 programming to simulate. After that the output will produces at waveform to display the output. The main function of FPGA controlling unit is producing sing le pulse and configuring optical switching system.