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In this paper, we introduce a generalized analytical framework to evaluate the coverage probability in an mmWave heterogeneous cellular network (HetNet) consisting of UHF macrocell base stations (BSs) and mmWave small cell BSs deployed in an urban area. A generalized user association scheme that can cover a few user association schemes is formulated and applied in the mmWave HetNet. Two important...
Hardware techniques such as dynamic voltage and frequency scaling may be used to reduce the energy consumption of network interfaces and achieve load-proportional energy usage. These techniques slow down the operation of the hardware and thus their power savings come at the cost of increased packet delays. This paper presents a methodology to address the energy-delay tradeoff while achieving load-proportional...
Considering the attack-defense characters in the sea under the information circumstance, the formation air defense simulation system is designed in the framework of HLA based on Multi-Agent System. To simulation subjects of the whole system, the conception of semi-autonomous/ autonomous, aggregate/platform level Agent is introduced, which improves the fidelity, convenients for hereditability in the...
Cognitive radio (CR) is the next-generation communication system with high spectrum utilization and efficiency. It is very crucial for CR to sense the environment spectrum holes quickly and accurately. In this paper, we implement two kinds of spectrum sensing algorithms: waveform-based detection and cyclostationary feature extraction methods. Both of these algorithms are capable to separate the signal...
The rapid development of information technology promotes the advent of ubiquitous age, and people's focus is mostly transferred to the ubiquitous learning. For the ubiquitous learning, the learning environment is important. Through studying all kinds of identification technologies, learners need the ubiquitous learning environment which they can get the right learning contents and achieve self-learning...
This paper presents a novel pipelined FFT/IFFT processor for OFDM applications. The proposed architecture employs a low-complexity complex multiplier and a constant complex multiplier to eliminate the need of ROM tables, thus consumes lower power than the existing works. Finally, this design spends about 33.6K gates, and the power consumption is about 9.8mW at 20MHz.
This paper discusses the realization of a cognitive radio (CR) reconfigurable communication architecture and platform. In particular, four key research activities are presented: (1) the design of a reasoning and learning framework for CR adaptation, (2) a software-defined radio (SDR) baseband system using GNU Radio, (3) the design of a multi-band/multi-protocol RF front-end, and (4) the design of...
This paper gives the theoretical and technical research about home network architecture, three-layer home network protocol conversion, hardware and software's design and integration of home network, proposes a solution about home network architecture and home wired control network based on SoC. Specific study includes: home network general interface SoC, Home Gateway SoC, home network platform design...
In this paper, a novel low-power Viterbi decoder with soft decision is proposed. For the branch metric of the Viterbi decoder, our design employs a soft-decision method to improve its correction capability. In order to find the survivor path efficiently, we modify the classical Viterbi decoding algorithm into a new one. This new algorithm is similar to the register-exchange method with lower latency,...
This work applies perfect-shuffle on software defined radio's bit-shuffling blocks, such as puncturer and interleaver, which data alignment issue is also investigated. A demonstration of such algorithm on IEEE 802.11a (WiFi) standard is implemented with Texas Instruments® intrinsic perfect-shuffle and inverse perfect-shuffle instructions combined with ANSI C on a TMS320 C64x digital signal processor...
A quality-of-service (QoS) aware, bi-directional channel NoC (BiNoC) architecture is proposed to support guarantee-service (GS) traffic while reducing packet delivery latency. By incorporating dynamically self-reconfigured bidirectional communication channels between adjacent routers, BiNoC architecture promises more flexibility for various traffic flow patterns. A novel inter-router communication...
Memory system of chip multi-threaded processors (CMT) suffers greater than ever before because of memory latencies brought by overloaded memory accessing requests. Data prefetching using helper threads has been proved to be an effective approach to tolerate memory latencies by past researches. However, as the sum total of threads increase, simultaneously occupying available idle thread context in...
A Bidirectional channel Network-on-Chip (BiNoC) architecture is proposed to enhance the performance of on-chip communication. The BiNoC allows each communication channel to be dynamically self-configured to transmit flits in either direction in order to better utilize on-chip hardware resources. This added flexibility promises better bandwidth utilization, lower packet delivery latency, and higher...
The pre-sending technique, proposed from distributed shared memory systems, pushes data to cache instead of pulling,aiming at reducing the traffic of communication. On a purpose of effectively improving cache hit ratio, this paper proposes a hardware-based active-pushing technique, which directs data owners like lower-level of memory hierarchy to actively push the predicted data at the right moment...
This paper presents a high-speed block interleaver/deinterleaver designed to prevent burst errors in wireless communications. Using FIFO banks, our proposed architecture is a high-speed design that owns lower hardware complexity and consumes lower power dissipation. Especially, the simple finite-state-machine control unit used in our design can provide an arbitrary column-wise permutation for the...
In this paper, we mainly present a general home network architecture, which can integrate various devices and networks. As a general interface, YT0101 communication board is a key component for the control network. It solidifies the standard communication protocol of home wired network. Various appliances can be accessed by home network after they are equipped with YT0101 interface board. We also...
Software simulation is the most important method for computer architects to evaluate the function and performance of their new designs. Due to the prohibitively long simulation time when running the full dynamic instruction streams of benchmarks on simulators in detailed simulation mode, many use sampling simulation to accelerate the simulation speed without sacrificing the accuracy greatly. However,...
This paper firstly analyzes the impact which clustering and non-clustering structure is on sensing spectrum expenditure. Furthermore, the reason that clustering structure is adopted in hierarchical spectrum sharing network is also illustrated by numerical simulation. Secondly, a clustering algorithm, which can reduce detection expenditure, is proposed based on the similarity of the spectrum in such...
In this paper, we apply flow maximization and develop a minimal adaptive routing scheme towards lower average packet latencies in a network-on-chip. The minimal adaptive algorithm allows packets to be forwarded in multiple directions. Typical routing algorithms select the next hop path for each packet and then resolve conflicts between packets that have been selected to have the same next hop path...
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