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Wireless Communication and sensor network, Intl Conference on

作者： Yue Yu Ling-Hua Zhang College of Telecommunications & Information Engineering Nanjing University of Posts and Telecommunications Nanjing China College of Telecommunications & Information Engineering Jiangsu Provincial Engineering Research Center of Telecommunications and Network Technology Nanjing China

ISBN: (纸本)9781479970926

Given to the non-line-of-sight (NLOS) error existing in the location of wireless sensor network (WSN), together with the strong anti-noise ability, good data approximation and flexible parallel data processing ability of BP neural network, the method of using BP neural network to optimize the location of WSN nodes is put forward in this paper. Firstly, the source of error is analyzed. Then the traditional BP neural network is optimized on the structure and the algorithm to improve the convergence speed. Finally reliable nodes are used to train the neural network. The trained neural network is applied to fulfill the location of unknown nodes. Meanwhile, the simulation results show that this method can effectively suppress NLOS error and its location precision is superior to the traditional Taylor algorithm and Chan algorithm.

关键词： Algorithm design and analysis Wireless sensor networks Reliability Training Biological neural networks Convergence

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A 0.5 V divider-by-2 design with optimization methods for wireless sensor networks

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Journal of Semiconductors 2013年第5期34卷 115-120页

作者：王利丹李智群 Institute of RF- & OE-ICs Southeast University Engineering Research Center of RF-ICs & RF-Systems Ministry of EducationSoutheast University Jiangsu Provincial Key Laboratory of Sensor Network Technology

A 0.5 V static master-slave D flip-flop （DFF） divider-by-2 is implemented with a 0.13 μm 1P8M RF- mixed signal CMOS process. Low-threshold transistors in a deep-N well with forward-body bias technology are used in the circuit. Each of the D-latch with source coupled logic consists of sensing and latching circuits. To increase the maximum operating frequency and decrease power consumption, the latching current is one half of the sensing current. The circuit optimization methods are described in this paper. The measured maximum operating frequency is 6.5 GHz and the minimum input singled-signal amplitude is 0.15 V.

关键词： low-threshold transistors deep-N well forward-body bias low voltage

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A low power quadrature up-conversion mixer for WSN application

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High technology Letters 2013年第3期19卷 228-232页

作者：吴晨健 Li Zhiqun Institute of RF-& OE-ICs Southeast University Engineering Research Center of RF-ICs & RF-Systems Ministry of EducationSoutheast University Jiangsu Provincial Key Laboratory of Sensor Network Technology

This paper presents an up-conversion mixer for 2.4GHz wireless sensor networks in 0. 181xm RF complementary metal-oxide semiconductor （CMOS） technology. It is based on a double-balanced Gilbert cell type. With two Gilbert cells it was applied quadrature modulation. Operational ampli- tiers are used in this design to improve the conversion gain under low power consumption. The mixer design is based on 0.18txm RF CMOS process. And the mixer test results indicate that under 1.8V power supply, with input frequency 2.4 - 2.4835GHz, the conversion voltage gain is 1.2 - 2dB. When the output frequency is 2.4GHz, its power gain is -4.46dB, and its input referred 1 dB com- pression point is -11.5dBm and it consumes 1.77mA current.

关键词： mixer low power Gilbert operational amplifier

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A 2 MHz 1 V programmable gain amplifier for WSN application

A 2 MHz 1 V programmable gain amplifier for WSN application

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2013 IEEE International Conference on Signal Processing, Communications and Computing, ICSPCC 2013

作者： Chengsi, Yang Zhiqun, Li Institute of RF- and OE-ICs Southeast University Nanjing China Engineering Research Center of RF-ICs and System Ministry of Education Nanjing China Key Laboratory of Sensor Network Technology of Jiangsu Province Wuxi China

ISBN: (纸本)9781479910274

This paper presents a low-voltage and low-power programmable gain amplifier (PGA) for Wireless sensor network (WSN) in 0.18 μm CMOS process. MOSFETs biased to moderate inversion region are applied in order to achieve maximum voltage gain, low device dissipation, and high linearity, simultaneously. The proposed PGA consists of three fixed-gain stages and a variable-gain stage. It works at 2 MHz with a voltage gain range of 0 dB to 70 dB in steps of 2 dB. Postsimulation results show that the -3 dB-bandwidth is higher than 6.6 MHz with capacitive loads of 2 pF. The whole PGA consumes less than 1.26 mW with a 1 V supply. © 2013 IEEE.

关键词： Wireless sensor networks

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An Energy-Efficient Asynchronous MAC for Bulk-Data Collection in Wireless sensor networks

An Energy-Efficient Asynchronous MAC for Bulk-Data Collectio...

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International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC

作者： Fulong Jiang Hao Liu National ASIC System Engineering Research Center Southeast University Nanjing China Jiangsu Provincial Key Laboratory of Sensor Network Technology Southeast University in Wuxi Wuxi China

ISBN: (纸本)9781479913275

In this paper, we propose a new asynchronous MAC protocol, the AW-MAC, for bulk-data collection in wireless sensor networks. We develop a routing-enhanced adaptive wakeup mechanism and an on-demand channel assignment scheme that allow the protocol to transform from single channel asynchronous schedule to multi-channel TDMA schedule in an on-demand fashion. These schemes overcome the sleep latency problem of duty-cycling and avoid the inefficiency of unscheduled asynchronous channel access. The simulation results show that our protocol largely reduces the latency on collecting bulk data then the state-of-the-art asynchronous duty-cycle MAC protocol while consuming similar energy.

关键词： Media Access Protocol Wireless sensor networks Packet loss Schedules Receivers

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0.18μ m cmos low voltage power amplifier for wsn application

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Telkomnika - Indonesian Journal of Electrical engineering 2013年第8期11卷 4470-4476页

作者： Chenjian, Wu Zhiqun, Li Nan, Yao Meng, Zhang Liang, Chen Jia, Cao Institute of RF- and OE-ICs Southeast University Engineering Research Center of RF-ICs and RF-Systems Ministry of Education Southeast University Nanjing 210096 China Jiangsu Provincial Key Laboratory of sensor network technology Wuxi 214135 China

This paper presents the design of a Class A/B power amplifier (PA) for 2.4-2.4835GHz Wireless sensor network (WSN) system in 0.18μm CMOS technology. The PA adopts the single-stage differential structure and the output power of the PA can be controlled by switching the sizes of transistors. Seven different level of output power can be obtained through a three-bit control code. The tested results shows that the proposed PA achieves power added efficiency (PAE) of 26.73% while delivering an output power of 6.35dBm at 1dB compression point. Its power gain is 15.87dB. With a low DC voltage supply of 1V, its power consumption is 15.3mW. The PA die size is 1070×610μm2. © 2013 Universitas Ahmad Dahlan.

关键词： Wireless sensor networks

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Design and optimization of a 0.5 V CMOS LNA for 2.4-GHz WSN application

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Journal of Semiconductors 2012年第10期33卷 109-115页

作者：陈亮李智群 Institute of RF-&OE-ICs Southeast University Engineering Research Center of RF-ICs&RF-Systems Ministry of EducationSoutheast University Jiangsu Provincial Key Laboratory of Sensor Network Technology

This paper presents a low noise amplifier（LNA）,which could work at an ultra-low voltage of 0.5 V and was optimized for WSN application using 0.13μm RF-CMOS *** circuit was analyzed and a new optimization method for a folded cascode LNA was *** results of the proposed circuit demonstrated a power gain of 14.13 dB,consuming 3 mW DC power,showing 1.96 dB NF and an input 1-dB compression point of -19.9 *** input power matching（S_（11）） and output power matching（S_（22）） were below -10 *** results indicate that this LNA is fully applicable to low voltage and low power applications.

关键词： LNA WSN CMOS

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Design of low power common-gate low noise amplifier for 2.4 GHz wireless sensor network applications

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Journal of Semiconductors 2012年第10期33卷 85-91页

作者：张萌李智群 Institute of RF-&OE-ICs Southeast University Engineering Research Center of RF-ICs&RF-Systems Ministry of EducationSoutheast University Jiangsu Provincial Key Laboratory of Sensor Network Technology

This paper presents a differential low power low noise amplifier designed for the wireless sensor network （WSN） in a TSMC 0.18μm RF CMOS process.A two-stage cross-coupling cascaded common-gate（CG） topology has been designed as the *** first stage is a capacitive cross-coupling *** can reduce the power and noise *** second stage is a positive feedback cross-coupling topology,used to set up a negative resistance to enhance the equivalent Q factor of the inductor at the load to improve the gain of the LNA.A differential inductor has been designed as the load to achieve reasonable *** inductor has been simulated by the means of momentum electromagnetic simulation in ADS.A ＂double-π＂ circuit model has been built as the inductor model by iteration in *** inductor has been fabricated separately to verify the model. The LNA has been fabricated and *** LNA works well centered at 2.44 *** measured gain S_（21） is variable with high gain at 16.8 dB and low gain at 1 *** NF（noise figure） at high gain mode is 3.6 dB,the input referenced 1 dB compression point（IP1dB） is about -8 dBm and the IIP3 is 2 dBm at low gain *** LNA consumes about 1.2 mA current from 1.8 V power supply.

关键词： low noise amplifier wireless sensor network low power inductor modeling cross-coupling positive feedback

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A Distributed Localization Algorithm Based on Random Diffusion in WSN

A Distributed Localization Algorithm Based on Random Diffusi...

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IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Qiong Wu Pingping Xu Suheng Zhang Hongyun Chu Department of Computer Science and Technology (The 3rd Department) Su Qian College Su Qian China Jiangsu Provincial Key Lab. of Sensor Network Technology Southeast University Wuxi China School of Electrical Engineering and Telecommunications UNSW Sydney Australia National Mobile Communications Research Lab. Southeast University Nanjing China

ISBN: (纸本)9781479914449

In many applications of Wireless sensor networks, it is crucial to know the location of sensor nodes. The distribution of the sensor nodes in many scenes is not uniform. However, it is impossible to equip all nodes with GPS receivers or configure the location for each node manually. Thus many localization methods have been proposed, such as the classical multi-dimensional scaling(MDS) localization algorithm. However, it has a low accuracy in large scale of sensor network with a lot of nodes. Thus, a random diffusion distributed localization algorithm is proposed in this paper. Results of simulations show that all the nodes can find their positions in 15 rounds when the network has 200 nodes in a square network. The localization algorithm has less running time, and provides a lower complexity than the classical MDS algorithm. The precision of this localization technique is restricted by the number of anchor nodes, communication radius of sensor node and the connectivity of network.

关键词： Wireless sensor networks Clustering algorithms Educational institutions Accuracy Electronic mail Merging Global Positioning System

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An appointment based MAC protocol for wireless sensor networks

An appointment based MAC protocol for wireless sensor networ...

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4th International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC 2012

作者： Liu, Hao Jiang, Fulong Yao, Guoliang National ASIC System Engineering Research Center Southeast University Nanjing China Jiangsu Provincial Key Laboratory of Sensor Network Technology Southeast University in Wuxi China

ISBN: (纸本)9780769548104

Several asynchronous duty cycle MAC protocols have been proposed for low power in the wireless sensor networks. However, these proposed MACs pay little attention on the performance degradation in many-to-one communications which is the most common traffic pattern in wireless sensor networks. In this paper, we propose AB-MAC, an appointment based MAC protocol to overcome the effect of channel contention of multiple senders. In AB-MAC, a fusion appointment scheme is proposed to enable scheduled batch transmission for multiple senders with low overhead. This scheme improves the transmission efficiency of the current asynchronous MACs in many-to-one traffic pattern. The experimental results show that, comparing to X-MAC which is a leading asynchronous MAC, AB-MAC can achieve better performance in terms of throughput, latency and energy efficiency. © 2012 IEEE.

关键词： Wireless sensor networks

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