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To minimize the access latency of set-associative caches, the data in all ways are read out in parallel with the tag lookup. However, this is energy inefficient, as only the data from the matching way is used and the others are discarded. This paper proposes an early tag lookup (ETL) technique for L1 instruction caches that determines the matching way one cycle earlier than the cache access, so that...
The future wireless services/applications should be provided in a cost-efficient manner due to the limited system resources. Considering the cost efficiency of the cognitive radio (CR) network, we define a utility function which jointly considers the benefit and the cost. The cognitive users (CUs) will get benefit if they are able to utilize the licensed spectrum, while they should pay the cost of...
Recent imprecise hardware (IHW) design methodologies present opportunities for achieving gains in nonfunctional efficiency design metrics by allowing errors in computation within error tolerant application domains. This work presents a novel imprecise Error Tolerant Balancing Adder (ETBA) design — an augmentation of the ETAIIM IHW adder that reduces errors by introducing a balance block that detects...
Spectrum sensing is one of the most important components of cognitive radio (CR) technology. In this paper, we investigate the design of the sensing time to minimize the secondary user (SU) transmission delay under the condition of sufficient protection to primary users (PUs). It has been proven that there exists one optimal sensing time which yields the minimum transmission delay. Then, a novel cooperative...
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