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Mobile nodes in some challenging network scenarios suffer from intermittent connectivity and frequent partitions e.g. battlefield and disaster recovery scenarios. Disruption Tolerant Network (DTN) technologies are designed to enable nodes in such environments to communicate with one another. In the past, we have designed ferry based scheme for interdomain routing. However, in some scenarios, it is...
In this paper, detailed analysis is given on the design of metastable-hardened and soft-error tolerant flip-flops while maintaining the basic characteristics of low-power and high-performance. We also propose two new flip-flop designs: pre-discharge soft-error tolerant flip-flop (PDFF-SE) and sense-amplifier transmission-gate soft-error tolerant flip-flop (SATG-SE). Following our main design approach,...
In this work, a new design approach in implementing low-energy, high-performance 64-bit adder using dynamic feedthrough logic (DFTL) is introduced and analyzed. Design issues of using DFTL in several logic depth are analyzed in order to achieve the best optimal balance between performance and power consumption. A ldquotiming windowrdquo technique is also proposed to reduce the amount of excessive...
This paper proposes an uneven pilot-assisted channel estimation (CE) technique for OFDM systems in mobile environments. We find that the prerequisites of most previous studies are using an equal spaced pilots pattern and sample-spaced channels. This is not the case in practical systems. According to conventional pilot-assisted estimators, we develop an improved channel estimation method based on the...
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