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Joint power and rate control considering fairness for cognitive radio network

Joint power and rate control considering fairness for cognit...

引用

2009 IEEE wireless Communications and networking Conference, WCNC 2009

作者： Zhu, Yajun Sun, Zhenqiang Wang, Wei Peng, Tao Wang, Wenbo Wireless Signal Processing and Networking Lab Key Laboratory of Universal Wireless Communication Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781424429486

In cognitive radio networks, the unlicensed users can utilize the unoccupied licensed spectrum opportunistically. In this paper, we propose a joint power and end-to-end rate control algorithm considering restricting the interference to licensed users. By duality theory, the optimal resource allocation solution is given for the unlicensed users while satisfying the interference temperature limits. An asynchronous algorithm is proposed to be implemented in practical networks. Finally, we give a discussion to the proposed algorithm's performance on fairness. Numerical results show that the proposed algorithm can limit the interference to licensed user under a predefined threshold while maintaining a satisfied data rate fairly. © 2009 IEEE.

关键词： Cognitive radio

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An achievable performance upper bound for discrete multitone equalization

An achievable performance upper bound for discrete multitone...

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GLOBECOM'04 - IEEE Global Telecommunications Conference

作者： Ding, Ming Shen, Zukang Evans, Brian L. Embedded Signal Processing Lab. Wireless Networking and Commun. Grp. University of Texas at Austin Austin TX 78712 United States

Discrete multitone is a popular discrete Fourier transform based implementation of multicarrier modulation for wireline communications. This paper examines the performance of a complex-tap filter bank structure for channel equalization in discrete multitone modulation systems. The structure under study passes the received signal through a number of logical paths. Each path takes care of one data carrying subcarrier. More specifically, each path cascades a finite impulse response frequency selective equalizer and a Goertzel filter computing a single point discrete Fourier transform. The delay on each logical path is individually optimized for best performance. In the presented simulations testing achievable bit rate on an asymmetric digital subscriber line transceiver, the filter bank appears to benchmark the bit rate performance among existing discrete multitone equalization methods. An iterative training procedure, which depends on the second-order statistics of the input and output sequences, is proposed to show the achievablity of performance. © 2004 IEEE.

关键词： Equalizers

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Energy efficient cluster ID based routing in wireless sensor networks - Analysis in Nakagami-m fading channel model

Energy efficient cluster ID based routing in wireless sensor...

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2007 IEEE International Symposium on a World of wireless, Mobile and Multimedia Networks, WOWMOM

作者： Ahmed, Irfan Munir, Saad A. Ma, Jian Wireless Signal Processing and Network Lab. Beijing University of Posts and Telecommunications State Key Lab. of Networking and Switching Beijing University of Posts and Telecommunications Nokia Research Center China

ISBN: (纸本)1424409926

This paper presents energy analysis of a new routing protocol CIDRSN (Cluster ID based Routing in static Sensor Networks) with closed form probability of error and bit energy expression in Nakagami-m fading channel. CIDRSN takes the cluster ID as next hop address instead of cluster-head ID in routing table and eliminate the cluster formation phase and routing phase from being executed in each round, which reduces the energy consumption and increases the network life to about 16%. Robustness is increased by multi-path routing. Simulation results show that the proposed protocol outperforms the preceding hierarchical routing protocols. © 2007 IEEE.

关键词： wireless sensor networks

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Joint Power and Rate Control Considering Fairness for Cognitive Radio Network

Joint Power and Rate Control Considering Fairness for Cognit...

引用

IEEE Conference on wireless Communications and networking

作者： Yajun Zhu Zhenqiang Sun Wei Wang Tao Peng Wenbo Wang Wireless Signal Processing and Networking Lab Key Laboratory of Universal Wireless Communication Beijing University of Posts and Telecommunications China

关键词： Radio control Cognitive radio Interference signal processing algorithms Power control Temperature Communication system control Telecommunication control Resource management Radio spectrum management

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Analysis of unitary distributed spatial-temporal precoding in MIMO relay systems

Analysis of unitary distributed spatial-temporal precoding i...

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2012 IEEE 12th International Conference on Computer and Information Technology, CIT 2012

作者： Long, Hang Xiang, Wei Zhang, Yueying Wang, Jing Wu, Bin Wireless Signal Processing and Networking Lab. Key Laboratory of Universal Wireless Communication Beijing University of Posts and Telecommunications Beijing China Faculty of Engineering and Surveying University of Southern Queensland Toowoomba QLD 4350 Australia Institute of Microelectronics Chinese Academy of Sciences Beijing China

ISBN: (纸本)9780769548586

In the multiple-input and multiple-output relay system, distributed spatial-temporal precoding (DSTP) has been proven to be capable of improving the system reliability and capacity with limited feedback. The outage performance of unitary DSTP is analyzed in this paper. By analyzing the singular values of the normalized equivalent channel, an upper bound of the outage probability is given. Then, the achievable diversity order is derived. Numerical and simulation results demonstrate the effectiveness of our analytical method. © 2012 IEEE.

关键词： Numerical methods

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An achievable performance upper bound for discrete multitone equalization

An achievable performance upper bound for discrete multitone...

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IEEE Conference and Exhibition on Global Telecommunications (GLOBECOM)

作者： M. Ding Z. Shen B.L. Evans Embedded Signal Processing Lab Wireless Networking and Communications Group University of Technology Austin TX USA

Discrete multitone is a popular discrete Fourier transform based implementation of multicarrier modulation for wireline communications. The paper examines the performance of a complex-tap filter bank structure for channel equalization in discrete multitone modulation systems. The structure under study passes the received signal through a number of logical paths. Each path takes care of one data carrying subcarrier. More specifically, each path cascades a finite impulse response frequency selective equalizer and a Goertzel filter computing a single point discrete Fourier transform. The delay on each logical path is individually optimized for best performance. In the presented simulations testing the achievable bit rate on an asymmetric digital subscriber line transceiver, the filter bank appears to benchmark the bit rate performance among existing discrete multitone equalization methods. An iterative training procedure, which depends on the second-order statistics of the input and output sequences, is proposed to show the achievability of performance.

关键词： Upper bound Filter bank Discrete Fourier transforms Bit rate OFDM modulation Frequency Equalizers Channel bank filters Finite impulse response filter Delay

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A power allocation method with maximum Effective Configuration Duration in wireless sensor networks

A power allocation method with maximum Effective Configurati...

引用

International Conference on Broadband Networks (BroadNets)

作者： Changqing Yang Wenbo Wang Guangxiang Yuan Mugen Peng Wireless Signal Processing and Networking Lab Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications Beijing China

This paper investigates a simple and effective power allocation method to maximize the Effective Configuration Duration (ECD) in wireless sensor networks, which aims to minimize the signaling overhead needed to perform relay nodes selection, Cooperative Set update and power allocation, resulting in obvious power saving and lifetime extension. Compared with traditional allocation schemes, this method jointly considers the residual energy of sensors and the mean of channel power gains, thus limits the feedback burden and increases the topology stability. Two classical power allocation methods are evaluated for comparison, and numerical results show that the proposed scheme can significantly extend ECD over a wide range of parameter values.

关键词： wireless sensor networks Relays Channel state information signal processing Resource management Protocols State feedback laboratories wireless communication Topology

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Energy efficient cluster id based routing in wireless sensor networks-analysis in nakagami-m fading channel model

Energy efficient cluster id based routing in wireless sensor...

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IEEE International Symposium on World of wireless Mobile and Multimedia Networks (WoWMoM)

作者： Irfan Ahmed Saad A. Munir Ma Jian Wireless Signal Processing and Network Laboratory Beijing University of Posts and Telecommunications China Wireless Signal Processing and Network Lab State Key Lab of Networking and Switching Beijing University of Posts & Telecommunications China Nokia Research Center China

This paper presents energy analysis of a new routing protocol CIDRSN (Cluster ID based Routing in static Sensor Networks) with closedform probability oferror and bit energy expression in Nakagami-m fading channel. CIDRSN takes the cluster ID as next hop address instead of cluster-head ID in routing table and eliminate the cluster formation phase and routing phase from being executed in each round, which reduces the energy consumption and increases the network life to about 16%. Robustness is increased by multi-path routing. Simulation results show that the proposed protocol outperforms the preceding hierarchical routing protocols.

关键词： wireless sensor networks Energy efficiency Fading Routing protocols Energy consumption Data communication signal analysis Steady-state Base stations signal processing

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Dynamic range impact on 3D MIMO channel characteristics in rural-macro scenario at 3.5 GHz 12

Dynamic range impact on 3D MIMO channel characteristics in r...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Zhang, Weite Tian, Lei Wu, Zhongyuan Zhang, Jianhua Zheng, Yi Cao, Jingmin Key Lab of Universal Wireless Communications Ministry of Education China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China China Mobile Research Institude Beijing China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu Sichuan China

ISBN: (纸本)9781785617911

Rural-macro (RMa) is an important scenario for fifth generation (5G) deployment, and there is a strong diffraction in RMa making it difficult to distinguish between line-of-sight (LoS) and non-line-of-sight (NLoS) case. Since the environmental condition is closely related to the dynamic range of channel impulse response (CIR), this paper studies the dynamic range impact on characteristics of three dimensional (3D) multiple-input multiple-output (MIMO) channels based on 3.5 GHz measurement campaign in RMa. The space-alternating generalized expectation-maximization (SAGE) algorithm is employed to estimate multipath component parameters. The channel statistical characteristics, channel capacity and eigenvalues of CIR matrix are calculated for different CIR dynamic ranges. The results show that the delay spread, the angle spread, the channel capacity and the sub-channel correlation are linearly related to the dynamic range of CIR. Thus, the results give a new perspective to study channel characteristics based on CIR dynamic range in RMa scenario. © 2018 Institution of Engineering and *** Rights Reserved.

关键词： Channel capacity

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Comparative channel study of ray tracing and measurement for an indoor scenario at 28 GHz 12

Comparative channel study of ray tracing and measurement for...

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12th European Conference on Antennas and Propagation, EuCAP 2018

作者： Zhan, Jinnan Zhang, Jianhua Tian, Lei Zhang, Xinzhuang Tang, Pan Dou, Jianwu Wei, Hewen Key Lab of Universal Wireless Communications Ministry of Education New Zealand State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 Beijing100876 China Wireless Algorithm Department Product R and D system ZTE Corp. Ltd. Shanghai201210 China National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu Sichuan610041 China

ISBN: (纸本)9781785617911

The millimeter wave communication is important for future wireless systems. In this paper, the channel characteristics at 28 GHz in an indoor scenario are researched based on ray tracing (RT) simulation and measurement. In the RT simulation, various configurations, such as different number of reflections, diffractions and penetrations are used. As for the measurement, two setups are implemented in order to analyze more parameters. Setup one is that biconical antennas are used at both the transmitter (TX) and receiver (RX). The other setup is that horn antenna at RX is rotated 360◦ in azimuth with a step of 5◦ when an omni-directional antenna located at TX. Meanwhile, antenna is rotated one circle with an elevation angle of 10◦, 0◦ and -10◦, respectively. Path loss and K-factor are analyzed firstly, and analysis results indicate the RT result with 1 or 2 reflections, 1 diffractions and 5 penetrations in this conference room is closest to the measurement result and channel models in 3GPP TR 38.901. Then, the root mean square (RMS) delay spread and RMS angular spread are investigated, which shows the value of measurement is a bit larger than RT because of the limitation of azimuth and elevation step. According to all the results, 1-2 reflections, 1 diffraction and 5 penetrations can be used in RT for future analysis of indoor scenario at 28 GHz. © Institution of Engineering and *** Rights Reserved.

关键词： Ray tracing

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