A Cooperative MMSE Relay Strategy for Wireless Sensor Networks

Krishna, R. K.; Xiong, Zhilan; Lambotharan, Sangarapillai

doi:10.1109/lsp.2008.925751

Cited by 83 publications

(55 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the AF multi-source-multi-relaymulti-destination system with a single antenna per node can be more cost effective and practical for the purpose of extending the data range [9]- [13] because all nodes can be arbitrarily located and a node can be a simple sensor under a power constraint. Furthermore, the number of sources cannot be equal to the number of either relays or destinations in a practical system.…”

Section: Motivationmentioning

confidence: 99%

Optimal Amplify-and-Forward Precode and Relay Amplifying Matrices

Kim

Kwon

Lee

et al. 2013

2013 IEEE 77th Vehicular Technology Conference (VTC Spring)

View full text Add to dashboard Cite

needed for others to directly quote significant amounts of information in their own work or to summarize substantial amounts of information in their own work. Limited amounts of information cited, paraphrased, or summarized from the work may be used with proper citation of where to find the original work. iii OPTIMAL AMPLIFY-AND-FORWARD PRECODE AND RELAY AMPLIFYING MATRICESThe following faculty members have examined the final copy of this thesis for form and content, and recommend that it be accepted in partial fulfillment of the requirement for the degree of Master of Science with a major in Electrical Engineering. Hu for being part of the adjudicating committee. Lastly, I express my sincere gratitude to the Republic of Korea Air Force, which provided me the opportunity to study abroad. This experience has proven to be very valuable, and I promise to make a commitment to my country. _________________________________________vi ABSTRACT A cooperative amplify-and-forward (AF) wireless relay scheme consisting of M sources, N relays, and L destinations all equipped with a single antenna was studied in this thesis. The main objective was to design jointly and iteratively the closed form of the minimum mean square error (MMSE)-based source precode and relay amplifying matrices under a jamming environment with various power constraints: (1) transmit, (2) aggregate, (3) source, and (4) relay. With the derived optimal source precode and relay amplifying matrices, the jamming influence of various power constraints on system performance were examined numerically usingMonte-Carlo simulations.vii

show abstract

Section: Motivationmentioning

confidence: 99%

Optimal Amplify-and-Forward Precode and Relay Amplifying Matrices

Kim

Kwon

Lee

et al. 2013

2013 IEEE 77th Vehicular Technology Conference (VTC Spring)

View full text Add to dashboard Cite

show abstract

“…The development of wireless sensor networks is motivated by many industrial and civilian application areas, such as environment, pollutants, medicine, vehicles, energy management, inventory control, home and building automation, homeland security and others [1][2][3][4][5][6][7][8][9][10]. Performance of WSN is measured and optimized based on various criteria, such as capacity, bit error rate, SNR, Cross-layer Optimal Scheduling, power requirements, security and robustness.…”

Section: Introductionmentioning

confidence: 99%

PSO for CWSN Using Adaptive Channel Estimation

Rahhal¹

2013

IJCNS

View full text Add to dashboard Cite

Wireless Sensor Network (WSN) is used in various applications. A main performance factor for WSN is the battery life that depends on energy consumption on the sensor. To reduce the energy consumption, an energy efficient transmission technique is required. Cluster Wireless Sensor Network (CWSN) groups the sensors that have the best channel condition and form a MIMO system. This leads to enhancing the transmission and hence reducing energy consumed by the sensor. In CWSN systems multiple signals are combined at the transmitter and transmitted by using multiple antennas according to channel condition. CWSN requires a good estimation of the Channel State Information (CSI) to implement a powerful and efficient system. Channel Estimation technique should be used to better form the CWSN and make use of the MIMO features. Adaptive Channel Estimation (ACE) is used to enhance the BER performance of the CWSN by utilizing the retransmission feature devised in this paper and feeding the CSI obtained to further enhance the clustering algorithm. We use Particle Swarm Optimization (PSO) algorithm to find the optimal cluster members according to a fitness function that derived from the channel condition. Too many calculations and operations are required in exhaustive search algorithms to form the optimal cluster arrangement. It shows that optimal cluster formation can be implemented fast and efficiently by using the PSO.

show abstract

“…Jointly with Orthogonal Frequency Division Multiplexing (OFDM) [3] or Orthogonal Frequency Division Multiple-Access (OFDMA) [4] it can also provide reliability. Additionally, the idea of increasing coverage, capacity and reliability in future wireless networks by using cooperative single-antenna relays has recently attracted much attention [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20].…”

mentioning

confidence: 99%

“…Relay schemes can be categorized into three different groups: Amplify-and-Forward (AF) [7,8,12,[15][16][17][18], Compress-and-Forward (CF) [21,9] and Decode-and-Forward (DF) [5-7, 10,11,13,20]. In the AF schemes, relays amplify (and sometimes transform [8]) the received signal and broadcast it to the destination.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Virtual Maximum Ratio Transmission for Downlink OFDMA Relay-based Networks

Jiménez

Gameiro

Armada

2010

Wireless Pers Commun

View full text Add to dashboard Cite

In this paper, a novel and practical transmission scheme for a Multiple Input Multiple Output-Orthogonal Frequency Division Multiple Access (MIMO-OFDMA) relaybased network is proposed and evaluated. We coin the term Virtual Maximum Ratio Transmission (VMRT) for the scheme which obtains diversity and array gain at both links in a two-hop transmission, while keeping the complexity low. Besides, the requirements of Channel State Information needed at the different network elements such as the Base Station, Relay Station or User Terminals are also limited, and so the feedback. The obtained global performance by using proposed VMRT outperforms other schemes. Diversity gains larger than 6 can be easily obtained with a reduced number of relays. For this reason, VMRT is a good candidate to achieve high speed transmission or increase coverage and reliability in slow varying channels for relay-based networks.

show abstract

A Cooperative MMSE Relay Strategy for Wireless Sensor Networks

Cited by 83 publications

References 8 publications

Optimal Amplify-and-Forward Precode and Relay Amplifying Matrices

Optimal Amplify-and-Forward Precode and Relay Amplifying Matrices

PSO for CWSN Using Adaptive Channel Estimation

Virtual Maximum Ratio Transmission for Downlink OFDMA Relay-based Networks

Contact Info

Product

Resources

About