Filters








762 Hits in 7.7 sec

On Interference Alignment and the Deterministic Capacity for Cellular Channels with Weak Symmetric Cross Links [article]

J. Buehler, G. Wunder
2011 arXiv   pre-print
This scheme is a form of interference alignment which exploits the channel gain difference of the two-user cell.  ...  In this paper, we study the uplink of a cellular system using the linear deterministic approximation model, where there are two users transmitting to a receiver, mutually interfering with a third transmitter  ...  [9] , [10] and cyclically symmetric deterministic interference channels [11] .  ... 
arXiv:1104.0136v1 fatcat:azgftdyusrglblzmhlzjjqgd3a

On the Feedback Capacity of the Fully Connected $K$-User Interference Channel

Soheil Mohajer, Ravi Tandon, H. Vincent Poor
2013 IEEE Transactions on Information Theory  
The coding scheme proposed for this network, termed cooperative interference alignment, is based on two key ingredients, namely, interference alignment and interference decoding.  ...  The symmetric -user interference channel with fully connected topology is considered, in which 1) each receiver suffers interference from all other transmitters, and 2) each transmitter has causal and  ...  ACKNOWLEDGMENT We are grateful to the associate editor and the reviewers for their suggestions which led to the enhancement of the scope and the readability of this work.  ... 
doi:10.1109/tit.2012.2235524 fatcat:vcduklnit5etfjri7bmgkkl4ja

Macro-pico amplitude-space sharing with layered interference alignment

Yafei Tian, Lifeng Huang, Chenyang Yang
2015 EURASIP Journal on Wireless Communications and Networking  
Inter-cell interference leads to severe performance degradation in cellular networks, and the study of multi-user interference channel is the corner stone for solving this problem.  ...  The performance of the proposed scheme is finally evaluated in homogeneous and heterogeneous cellular networks with practical settings.  ...  The generalized degrees of freedom (GDoF) of the symmetric Gaussian K-user interference channel were studied in [33] , where all direct links have the same SNR and all cross-links have the same interference-tonoise  ... 
doi:10.1186/s13638-015-0389-z fatcat:mzwzd3fndnh4hmtfyn5u6l6peu

On the Feedback Capacity of the Fully Connected K-User Interference Channel [article]

Soheil Mohajer, Ravi Tandon, H. Vincent Poor
2012 arXiv   pre-print
The coding scheme proposed for this network, termed cooperative interference alignment, is based on two key ingredients, namely, interference alignment and interference decoding.  ...  The symmetric K user interference channel with fully connected topology is considered, in which (a) each receiver suffers interference from all other (K-1) transmitters, and (b) each transmitter has causal  ...  The symmetric feedback capacity of the linear deterministic K-user fully connected interference channel with parameters n and m is given by R sym =          n − m 2 n > m (weak interference),  ... 
arXiv:1110.6487v2 fatcat:7ws2wi6ynfdp7mrc7236iyx45u

Sum-GDoF of Symmetric Multi-hop Interference Channel under Finite Precision CSIT using Aligned-Images Sumset Inequalities [article]

Junge Wang, Syed Ali Jafar
2021 arXiv   pre-print
Remarkably, for large L, the GDoF value approaches that of the one hop broadcast channel that is obtained by full cooperation among the two transmitters of the last hop, with finite precision CSIT.  ...  Aligned-Images Sumset Inequalities are used in this work to study the Generalized Degrees of Freedom (GDoF) of the symmetric layered multi-hop interference channel under the robust assumption that the  ...  Specifically, for our symmetric model, the direct links (between Tx i[ ] and Rx i[ ] ) have channel strength corresponding to the exponent 1 and cross links have coarse channel strength corresponding to  ... 
arXiv:2103.07830v1 fatcat:cfrum3ajqjcg3n26v6josq56cq

A Unified Theory of Multiple-Access and Interference Channels via Approximate Capacity Regions for the MAC-IC-MAC [article]

Yimin Pang, Mahesh K. Varanasi
2018 arXiv   pre-print
Approximate capacity regions are established for a class of interfering multiple access channels consisting of two multiple-access channels (MACs), each with an arbitrary number of transmitters, with one  ...  The symmetric generalized degrees of freedom (GDoF) of the symmetric Gaussian MAC-IC-MAC with more than one user per cell, which is a function of the interference strength (the ratio of INR to SNR at high  ...  The capacity region is found for very strong and some cases of strong interference and upper and lower bounds on the sumrate in the weak interference regime (with the lower bound achievable by treating  ... 
arXiv:1604.02234v2 fatcat:v7gwbtmjsvcbdndnj27a52ghkm

Cognitive Interference Alignment for Spectral Coexistence [chapter]

Shree Krishna Sharma, Symeon Chatzinotas, Björn Ottersten
2014 Signals and Communication Technology  
Because of its simplicity and ease of implementation, this approach is widely used in practice, but does not achieve interference-free capacity even for the simple case of a Broadcast Channel (BC) [71]  ...  Due to the recent advancements in terrestrial cellular technology and multibeam satellite technology, denser deployments of cells/beams have become possible for providing higher capacity and network availability  ...  Acknowledgements This work was supported by the National Research Fund, Luxembourg under AFR (Aids Training-Research) grant for PhD project (Reference 3069102) and the CORE project "CO2SAT: Cooperative  ... 
doi:10.1007/978-3-319-01718-1_2 fatcat:hrcd5b2wkjem7gvmzuq6v452lu

Interference Alignment with Asymmetric Complex Signaling - Settling the Host-Madsen-Nosratinia Conjecture [article]

Viveck R. Cadambe, Syed A. Jafar, Chenwei Wang
2009 arXiv   pre-print
For the class of linear beamforming and interference alignment schemes considered in this paper, it is also shown that 1.2 is the maximum number of degrees of freedom achievable on the complex Gaussian  ...  It has been conjectured by Host-Madsen and Nosratinia that complex Gaussian interference channels with constant channel coefficients have only one degree-of-freedom regardless of the number of users.  ...  Acknowledgment The authors would like to acknowledge Tiangao Gou, whose comments helped simplify the achievable scheme presented in this paper.  ... 
arXiv:0904.0274v1 fatcat:fqclbgxfrjgyzf42uhwjkkbbmy

Interference Mitigation in Large Random Wireless Networks [article]

Matthew Aldridge
2011 arXiv   pre-print
We also include an overview of a new set of schemes for dealing with interference known as interference alignment, paying special attention to a channel-state-based strategy called ergodic interference  ...  In Chapter 4, we use ergodic interference alignment to derive the asymptotic sum-capacity of large random dense networks.  ...  Ideas from interference alignment (specifically ergodic interference alignment) are crucial in performing well on these links, and hence in the whole network.  ... 
arXiv:1109.1255v1 fatcat:soigx4w3ejeg5onrxg2jvp67p4

Interference Management in 5G and Beyond Network: Requirements, Challenges and Future Directions

Maraj Uddin Ahmed Siddiqui, Faizan Qamar, Faisal Ahmed, Quang Ngoc Nguyen, Rosilah Hassan
2021 IEEE Access  
The study focuses on the various interference effect in HetNet, RN, D2D, and IoT.  ...  The novel concept of Fifth Generation (5G) cellular networks brings a combination of a diversified set of devices and machines with great improvement in a unique way compared to previous technologies.  ...  On the other hand, cross-tier interference is generated between the cellular user and D2D user.  ... 
doi:10.1109/access.2021.3073543 fatcat:pszxfc6abbg6lkdf2yegsiobfy

A Survey on Spectrum Management for Unmanned Aerial Vehicles (UAVs)

Mohammed A. Jasim, Hazim Shakhatreh, Nazli Siasi, Ahmad Sawalmeh, Adel Aldalbahi, Ala Al-Fuqaha
2021 IEEE Access  
Existing surveys mostly focus on UAV applications, channel models, and security challenges, with a lack of studies on spectrum management in the context of UAV networks.  ...  It identifies suitable management schemes that align with UAV features and requirements to enable safe and efficient usage of the radio spectrum.  ...  Lastly, interference alignment methods can be applied to relax the threshold on the SU transmission powers.  ... 
doi:10.1109/access.2021.3138048 fatcat:2h5ls7ywo5g3bbz454gqatvkw4

Adaptive limited feedback for MISO wiretap channels with cooperative jamming

Minyan Pei, Dongtang Ma, Jibo Wei
2013 2013 IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC)  
Approaches for secrecy based on channel coding design are then examined, along with a description of inter-disciplinary approaches based on game theory and stochastic geometry.  ...  The survey begins with an overview of the foundations dating back to the pioneering work of Shannon and Wyner on information-theoretic security.  ...  The recently proposed polar coding scheme has been shown to achieve the secrecy capacity for binary symmetric and deterministic wiretap channels [217] , [218] .  ... 
doi:10.1109/spawc.2013.6612057 dblp:conf/spawc/PeiMW13 fatcat:gjn4o2l4qjae5ipsr6zfjo35yu

Principles of Physical Layer Security in Multiuser Wireless Networks: A Survey

Amitav Mukherjee, S. Ali A. Fakoorian, Jing Huang, A. Lee Swindlehurst
2014 IEEE Communications Surveys and Tutorials  
Approaches for secrecy based on channel coding design are then examined, along with a description of inter-disciplinary approaches based on game theory and stochastic geometry.  ...  The survey begins with an overview of the foundations dating back to the pioneering work of Shannon and Wyner on information-theoretic security.  ...  The recently proposed polar coding scheme has been shown to achieve the secrecy capacity for binary symmetric and deterministic wiretap channels [217] , [218] .  ... 
doi:10.1109/surv.2014.012314.00178 fatcat:cmqxgwotmvbmldwqdvjkzsweam

Fundamentals of Wireless Communications [chapter]

2006 Next Generation Wireless Systems and Networks  
At a fixed symbol time i, the hn [i]'s are identically distributed across the carriers. 2. More generally, the processes { hn [i]} n have the same statistics for different n's.  ...  We have focused on the sum capacity in the symmetric case where users have identical channel statistics and power constraints.  ...  The link level performance then depends on the statistics of the interference.  ... 
doi:10.1002/0470024569.ch2 fatcat:pwvdrx7kqvbwzoaftosigsfz2e

K--User Interference Channel with Backhaul Cooperation: DoF vs. Backhaul Load Trade--Off [article]

Borna Kananian, Mohammad Ali Maddah-ali, Babak Hossein Khalaj
2018 arXiv   pre-print
In continue, we further investigate the trade-off for the cases, where the backhaul or the wireless links (interference channel) are not fully connected.  ...  In this paper, we consider multiple-antenna K-user interference channels with backhaul collaboration in one side (among the transmitters or among the receivers) and investigate the trade-off between the  ...  the wireless link are aligned, and these two together provides the means for canceling the interference and revealing the desired signal.  ... 
arXiv:1807.08646v1 fatcat:7fzw63cnvjfn3lh7wv2pbpvmeu
« Previous Showing results 1 — 15 out of 762 results