We present the discovery of XRF 050215B and its afterglow. The burst was detected by the Swift BAT during the check-out phase and observations with the X-ray Telescope began approximately 30 minutes after the burst. These observations found a faint, slowly fading X-ray afterglow near the centre of the error box as reported by the BAT. Infrared data, obtained at UKIRT after 10 hours also reveale...

We explore the design of quantum error-correcting codes for cases where the decoherence events of qubits are correlated. In particular, we consider the case where only spatially contiguous qubits decohere, which is analogous to the case of burst errors in classical coding theory. We present several different efficient schemes for constructing families of such codes. For example, we construct a ...

It is well known that spatially coupled (SC) codes with erasure-BP decoding have powerful error correcting capability over memoryless erasure channels. However, the decoding performance of SC-codes significantly degrades when they are used over burst erasure channels. In this paper, we propose band splitting permutations (BSP) suitable for (l, r, L) SC-codes. The BSP splits a diagonal band in a...

Optical Burst Switching (OBS) has been proposed as a promising switching technology for the next generation of optical transport network. In this dissertation, we address the issue how to provide QoS control and improve performance in OBS networks. In order to provide proportional differentiated services without or with absolute constraints in bufferless OBS networks, a Dynamic Wavelength Selec...

BURST CORRECTION CODING FROM LOW-DENSITY PARITY-CHECK CODES Wai Han Fong, PhD George Mason University, 2015 Dissertation Director: Dr. Shih-Chun Chang Dissertation Co-Director: Dr. Shu Lin This thesis explores techniques and theoretical bounds on efficiently encodable low-density parity-check (LDPC) codes for correcting single and multiple bursts of erasures and/or errors. The approach is to co...

We demonstrate a multi-rate burst-mode photon-counting receiver for undersea communication at data rates up to 10.416 Mb/s over a 30-foot water channel. To the best of our knowledge, this is the first demonstration of burst-mode photon-counting communication. With added attenuation, the maximum link loss is 97.1 dB at =517 nm. In clear ocean water, this equates to link distances up to 148 mete...

A digital dual-rate burst-mode receiver, intended to support 10 and 1 Gb/s coexistence in optical access networks, is proposed and experimentally characterized. The receiver employs a standard DC-coupled photoreceiver followed by a 20 GS/s digitizer and the detection of the packet presence and line-rate is implemented in the digital domain. A polyphase, 2 samples-per-bit digital signal processi...

The data reliability has become an important issue in most communication and storage systems for high speed operation and mass data process. Various error correction code are provided for improving data reliability. A Reed-Solomon code is quite suitable for burst errors, but in case of random errors, it has some difficulty. For MLC NAND flash memories, BoseChaudhuriHocquenghem (BCH) codes are f...

We present an approach to design of fault tolerant computing systems. In this paper, a technique is employed that enable the combination of several codes, in order to obtain flexibility in the design of error correcting codes. Code combining techniques are very effective, which one of these codes are turbo codes. The Algorithm-based fault tolerance techniques that to detect errors rely on the c...