The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels

Jangho Yoon, Won-Yong Shin, Hwang Soo Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Opportunistic interference alignment (OIA) is known to achieve the optimal degrees-of-freedom (DoF) in the interfering multiple-access channel (IMAC) with independent and identically distributed (i.i.d.) Rayleigh fading, provided that a certain user scaling condition is satisfied. We analyze the performance of OIA in a poor scattering $K$-cell single-input multiple-output IMAC, where there exist finite paths between the transmitter and receiver sides. Under the feasible model, we derive a new fundamental user scaling law, required to achieve a target DoF, which generalizes the existing achievability result shown for the i.i.d. Rayleigh fading case. Our main result indicates that $KS$ DoF is achievable if the number of per-cell mobile stations (MSs) scales at least as $\mbox{SNR}^{(K-1)\min(L,S)}$, where $L$ denotes the number of paths and $S$ denotes the number of simultaneously transmitting MSs per cell. To verify our achievability result for finite system parameters, computer simulations are performed along with comparison to the i.i.d. Rayleigh channel case. The amount of leakage of interference is numerically evaluated and is shown to be consistent with our theoretical result. The achievable sum-rates are also evaluated.

Original languageEnglish
Title of host publication2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479980888
DOIs
Publication statusPublished - 2015 Jul 1
Event81st IEEE Vehicular Technology Conference, VTC Spring 2015 - Glasgow, United Kingdom
Duration: 2015 May 112015 May 14

Publication series

NameIEEE Vehicular Technology Conference
Volume2015
ISSN (Print)1550-2252

Other

Other81st IEEE Vehicular Technology Conference, VTC Spring 2015
CountryUnited Kingdom
CityGlasgow
Period15/5/1115/5/14

Fingerprint

Multiple Access Channel
Rayleigh fading
Degree of freedom
Scattering
Identically distributed
Rayleigh Fading
Interference
Scaling laws
Transmitters
Cell
Alignment
Denote
Path
Computer simulation
Scaling Laws
Leakage
Rayleigh
Transmitter
Receiver
Computer Simulation

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Yoon, J., Shin, W-Y., & Lee, H. S. (2015). The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels. In 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings [7146126] (IEEE Vehicular Technology Conference; Vol. 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/VTCSpring.2015.7146126
Yoon, Jangho ; Shin, Won-Yong ; Lee, Hwang Soo. / The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels. 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. (IEEE Vehicular Technology Conference).
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Yoon, J, Shin, W-Y & Lee, HS 2015, The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels. in 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings., 7146126, IEEE Vehicular Technology Conference, vol. 2015, Institute of Electrical and Electronics Engineers Inc., 81st IEEE Vehicular Technology Conference, VTC Spring 2015, Glasgow, United Kingdom, 15/5/11. https://doi.org/10.1109/VTCSpring.2015.7146126

The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels. / Yoon, Jangho; Shin, Won-Yong; Lee, Hwang Soo.

2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2015. 7146126 (IEEE Vehicular Technology Conference; Vol. 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Yoon J, Shin W-Y, Lee HS. The effect of poor scattering on the degrees-of-freedom in interfering multiple-access channels. In 2015 IEEE 81st Vehicular Technology Conference, VTC Spring 2015 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2015. 7146126. (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VTCSpring.2015.7146126