Periodic Report Summary 2 - FLOW (Fundamental Limits of Network Coding in Wireless Networks)
High spectral efficiency is the holy grail of wireless networks due to the well-known scarcity of radio spectrum. While until recently there seemed to be no way out of the apparent end of the road in spectral efficiency growth, the emerging approach of Network Coding has cast new light in the spectral efficiency prospects of wireless networks. Initial results have demonstrated that the use of network coding increases the spectral efficiency up to 50%. Such a significant performance gain is crucial for important bandwidth-hungry applications such as broadband cellular systems, wireless sensor networks and underwater communication scenarios. etc. Prior to this project, network coding has received a great deal of attention; however, many existing works focused on the application of network coding to upper layers and the study of its impact on the physical layer (PHY) design only began recently. This project has systematically studied network coding at the physical layer, where we have not only characterize the fundamental limits of physical layer network coding in the context of secure communications, but have also designed various practical digital signal processing (DSP) algorithms to realize the performance gain promised by those theoretic results. In particular, the outcomes for this period are given as follows:
Dr Ding’s one year back to Newcastle University has been very fruitful. The following works have been completed:
1. Dr Ding has kept collaborating with Prof. Poor at Princeton University in the following two areas
• We have found a new application of network coding in future 5G communication networks. In particular, the concept of network coding has been used to develop a new type of 5G multiple access, termed non-orthogonal multiple access (NOMA). For example, the base station of NOMA will send a superimposed mixture of messages, the way similar to a relay in network coding. A receiver with strong channel condition will carry out successful interference cancellation, similar to the strategy used by network coding receivers who will remove self-interference first and then carry out decoding for their partners’ information. Their publications in this area can be found as follows:
[1] Z. Ding, Z. Yang, P. Fan and H. V. Poor, "On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed Users," Signal Processing Letters, IEEE , vol.21 no.12 pp.1501,1505 Dec. 2014
[2] Z. Ding, M. Peng and H. V. Poor, "Cooperative Non-Orthogonal Multiple Access in 5G Systems”, IEEE Communication Letters, to appear in 2015 (http://arxiv.org/abs/1410.5846).
[3]Z. Ding, F. Adachi and H. V. Poor, “The Application of MIMO to Non-Orthogonal Multiple Access”, http://arxiv.org/abs/1503.05367
[4] Z. Ding, P. Fan and H. V. Poor, “Impact of User Pairing on 5G Non-Orthogonal Multiple Access”, http://arxiv.org/abs/1412.2799
• The energy constraint at relays, the most important component of network coding networks, has been studied, and the use of simultaneous wireless information and power transfer has been applied to relaying networks. Specifically the relays can carry out radio frequency harvesting by using the signals sent by the sources, and such harvested energy can be used as the relay transmission power. In this way, the battery life of relays can be extended, and there is more incentive for wireless networks to help sources to deliver their information to their destinations. Dr Ding and his team has published the following papers:
[5] Z. Ding, I. Krikidis, B. Sharif, H. V. Poor, "Wireless Information and Power Transfer in Cooperative Networks With Spatially Random Relays," Wireless Communications, IEEE Transactions on , vol.13 no.8 pp.4440,4453 Aug. 2014
[6] Z. Ding; S. Perlaza, I. Esnaola, H. V. Poor, "Power Allocation Strategies in Energy Harvesting Wireless Cooperative Networks," Wireless Communications, IEEE Transactions on , vol.13 no.2 pp.846,860 February 2014
[7] I. Krikidis, S. Sasaki, S. Timotheou, and Z. Ding, "A Low Complexity Antenna Switching for Joint Wireless Information and Energy Transfer in MIMO Relay Channels," Communications, IEEE Transactions on , vol.62 no.5 pp.1577,1587 May 2014
[8] Z. Ding and H. V. Poor, “Energy Harvesting Cooperative Networks: Is the Max-Min Criterion Still Diversity-Optimal?” http://arxiv.org/abs/1403.0354
2. A new form of network coding inspired by the concept of cognitive radio networks has been developed in [1]. Specifically the key idea is to apply the concept of cognitive radio (CR) in network coding transmissions, where the base station tries sending new information while helping users’ transmissions as a relay. An asymmetric network coding method for information exchange between the BS and the users has been developed, and an iterative precoding design has also been developed to approach the optimal performance
[9] Zhongyuan Zhao; Zhiguo Ding; Mugen Peng; Wenbo Wang; Thompson, J.S. "On the Design of Cognitive-Radio-Inspired Asymmetric Network Coding Transmissions in MIMO Systems," Vehicular Technology, IEEE Transactions on , vol.64 no.3 pp.1014-1025 March 2015
3. In order to have a better dissemination for our research results, Dr Ding has played the leading role in writing two magazine papers
[10] Z. Ding, C. Zhong, D. W. K. Ng, M. Peng, H. A. Suraweera, R. Schober, H. V. Poor, "Application of smart antenna technologies in simultaneous wireless information and power transfer," Communications Magazine, IEEE , vol.53 no.4 pp.86,93 April 2015
[11] G. Zheng, I. Krikidis, C. Masouros, S. Timotheou, D. Toumpakaris, and Z. Ding, "Rethinking the role of interference in wireless networks," Communications Magazine, IEEE , vol.52 no.11 pp.152,158 Nov. 2014
4. In addition to the above completed research works, Dr Ding’s other research activities include
• delivered Plenary talk at AICWC-2013 and 2014, invited papers at EUSIPCO 2014, ICCS 2014, WCSP 2014.
• Won two best paper awards (WCSP-2014 and GLOBECOM Best 50 Papers).
• Serve as the editor for four IEEE journals, IEEE Transactions on Communications, IEEE Transactions on Vehicular Technologies, IEEE Communication Letters and IEEE Wireless Communication Letters.
Dr Ding’s one year back to Newcastle University has been very fruitful. The following works have been completed:
1. Dr Ding has kept collaborating with Prof. Poor at Princeton University in the following two areas
• We have found a new application of network coding in future 5G communication networks. In particular, the concept of network coding has been used to develop a new type of 5G multiple access, termed non-orthogonal multiple access (NOMA). For example, the base station of NOMA will send a superimposed mixture of messages, the way similar to a relay in network coding. A receiver with strong channel condition will carry out successful interference cancellation, similar to the strategy used by network coding receivers who will remove self-interference first and then carry out decoding for their partners’ information. Their publications in this area can be found as follows:
[1] Z. Ding, Z. Yang, P. Fan and H. V. Poor, "On the Performance of Non-Orthogonal Multiple Access in 5G Systems with Randomly Deployed Users," Signal Processing Letters, IEEE , vol.21 no.12 pp.1501,1505 Dec. 2014
[2] Z. Ding, M. Peng and H. V. Poor, "Cooperative Non-Orthogonal Multiple Access in 5G Systems”, IEEE Communication Letters, to appear in 2015 (http://arxiv.org/abs/1410.5846).
[3]Z. Ding, F. Adachi and H. V. Poor, “The Application of MIMO to Non-Orthogonal Multiple Access”, http://arxiv.org/abs/1503.05367
[4] Z. Ding, P. Fan and H. V. Poor, “Impact of User Pairing on 5G Non-Orthogonal Multiple Access”, http://arxiv.org/abs/1412.2799
• The energy constraint at relays, the most important component of network coding networks, has been studied, and the use of simultaneous wireless information and power transfer has been applied to relaying networks. Specifically the relays can carry out radio frequency harvesting by using the signals sent by the sources, and such harvested energy can be used as the relay transmission power. In this way, the battery life of relays can be extended, and there is more incentive for wireless networks to help sources to deliver their information to their destinations. Dr Ding and his team has published the following papers:
[5] Z. Ding, I. Krikidis, B. Sharif, H. V. Poor, "Wireless Information and Power Transfer in Cooperative Networks With Spatially Random Relays," Wireless Communications, IEEE Transactions on , vol.13 no.8 pp.4440,4453 Aug. 2014
[6] Z. Ding; S. Perlaza, I. Esnaola, H. V. Poor, "Power Allocation Strategies in Energy Harvesting Wireless Cooperative Networks," Wireless Communications, IEEE Transactions on , vol.13 no.2 pp.846,860 February 2014
[7] I. Krikidis, S. Sasaki, S. Timotheou, and Z. Ding, "A Low Complexity Antenna Switching for Joint Wireless Information and Energy Transfer in MIMO Relay Channels," Communications, IEEE Transactions on , vol.62 no.5 pp.1577,1587 May 2014
[8] Z. Ding and H. V. Poor, “Energy Harvesting Cooperative Networks: Is the Max-Min Criterion Still Diversity-Optimal?” http://arxiv.org/abs/1403.0354
2. A new form of network coding inspired by the concept of cognitive radio networks has been developed in [1]. Specifically the key idea is to apply the concept of cognitive radio (CR) in network coding transmissions, where the base station tries sending new information while helping users’ transmissions as a relay. An asymmetric network coding method for information exchange between the BS and the users has been developed, and an iterative precoding design has also been developed to approach the optimal performance
[9] Zhongyuan Zhao; Zhiguo Ding; Mugen Peng; Wenbo Wang; Thompson, J.S. "On the Design of Cognitive-Radio-Inspired Asymmetric Network Coding Transmissions in MIMO Systems," Vehicular Technology, IEEE Transactions on , vol.64 no.3 pp.1014-1025 March 2015
3. In order to have a better dissemination for our research results, Dr Ding has played the leading role in writing two magazine papers
[10] Z. Ding, C. Zhong, D. W. K. Ng, M. Peng, H. A. Suraweera, R. Schober, H. V. Poor, "Application of smart antenna technologies in simultaneous wireless information and power transfer," Communications Magazine, IEEE , vol.53 no.4 pp.86,93 April 2015
[11] G. Zheng, I. Krikidis, C. Masouros, S. Timotheou, D. Toumpakaris, and Z. Ding, "Rethinking the role of interference in wireless networks," Communications Magazine, IEEE , vol.52 no.11 pp.152,158 Nov. 2014
4. In addition to the above completed research works, Dr Ding’s other research activities include
• delivered Plenary talk at AICWC-2013 and 2014, invited papers at EUSIPCO 2014, ICCS 2014, WCSP 2014.
• Won two best paper awards (WCSP-2014 and GLOBECOM Best 50 Papers).
• Serve as the editor for four IEEE journals, IEEE Transactions on Communications, IEEE Transactions on Vehicular Technologies, IEEE Communication Letters and IEEE Wireless Communication Letters.