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In this paper, we present extensions to the floating point unit of the RISC-V ISA with different numeric precision including single precision, half precision and quarter precision. To achieve more energy efficiency transprecision feature is introduced through configurable mantissa precision, which can be used to reduce the number of iterations and thus reduce the energy consumption achieving a programmable...
The base station (BS) density configuration is a key factor to improve energy efficiency (EE) performances. In this paper, BS density configurations for achieving the optimal EE performance in two-tier cellular networks are analyzed, where the Poisson point process (PPP) is used to model the BS spatial distribution. To make the EE performances trackable and analyzable, the BS density optimization...
In this paper, we consider a blind interference alignment (BIA) based coordinated multi-point transmission and reception (CoMP) scheme in downlink MIMO system. The proposed scheme is able to mitigate the inter-channel interference (ICI) from adjacent cell effectively without feedback channel state information (CSI) to the base stations. The transmitter achieves blind interference alignment among two...
Clustering protocol is the most typical hierarchy protocol for wireless sensor networks. It has higher energy efficiency and better network management than traditional flat protocols. However, typical clustering protocols such as LEACH, have some drawbacks: unreasonable distribution of cluster heads, large consumption by the single-hop communication between cluster heads and the sink, and strong dependence...
Wireless sensor networks provide an opportunity to enhance the current equipment diagnosis systems in the process industry, which have been based so far on wired networks. In this paper, we use our experience in the Anshan Iron and Steel Factory, China, as an example to present the issues from the real field of process industry, and our solutions. The challenges are three fold: First, very high reliability...
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