access icon free Closed-form approximation of the capacity in multi-sector cells: application to LTE tri-sector antenna

This study deals with the ergodic capacity in multi-sector cells. Due to the presence of the antenna gain pattern in the expression of the capacity, the latter may be difficult to express analytically. To overcome this problem, the authors propose to approximate the antenna gain pattern by means of a piecewise linear function, which leads to a general closed-form formulation of the capacity. The obtained expression is applicable for any used antenna. The simulations results are performed by using the long term evolution (LTE) TR 36.942 antenna specification, showing that the proposed closed-form capacity almost matches the exact one. In addition, the authors provide a practical use case of the method, by considering a scenario where the users are clustered within the area covered by the antenna.

Inspec keywords: Long Term Evolution; mobile antennas; cellular radio; antenna radiation patterns; approximation theory

Other keywords: antenna gain pattern; multisector cell capacity; closed-form approximation; general closed-form formulation; LTE TR 36.942 antenna specification; piecewise linear function; LTE tri-sector antenna; ergodic capacity; closed-form capacity; Long Term Evolution

Subjects: Interpolation and function approximation (numerical analysis); Single antennas; Mobile radio systems

References

    1. 1)
      • 10. Zhang, J., Pan, C., Pei, F., et al: ‘Three-dimensional fading channel models: A survey of elevation angle research’, IEEE Commun. Mag., 2014, 52, (6), pp. 218226.
    2. 2)
      • 7. Matthaiou, M., Chatzidiamantis, N.D., Karagiannidis, G.K.: ‘A new lower bound on the ergodic capacity of distributed MIMO systems’, IEEE Signal Process. Lett., 2011, 18, (4), pp. 227230.
    3. 3)
      • 8. Shin, H., Lee, J.H.: ‘Closed-form formulas for ergodic capacity of MIMO Rayleigh fading channels’. Proc. of ICC'03, Anchorage, Alaska, May 2003, vol. 5, pp. 29963000.
    4. 4)
      • 12. Goldsmith, A.: ‘Wireless communications’ (Standford University, 2004).
    5. 5)
      • 4. Musavian, L., Aissa, S.: ‘Capacity and power allocation for spectrum-sharing communications in fading channels’, IEEE Trans. Wirel. Commun., 2009, 8, (1), pp. 148156.
    6. 6)
      • 2. Wang, L.C., Leung, K.K.: ‘A high-capacity wireless network by quad-sector cell and interleaved channel assignment’, IEEE J. Sel. Areas Commun., 2000, 18, (3), pp. 472480.
    7. 7)
      • 14. Abramowitz, M., Stegun, I.: ‘Handbook of mathematical functions with formulas, graphs, and mathematical tables’ (Dover, Ney York, 1970), ch. 6.
    8. 8)
      • 15. Mehlführer, C., Ikuno, J.C., Šimko, M., et al: ‘The Vienna LTE simulators - enabling reproducibility in wireless communications research’, EURASIP J. Appl. Signal Process., 2011, 2011, (29), pp. 114.
    9. 9)
      • 6. Gong, X., Vorobyov, S.A., Tellambura, C.: ‘Optimal bandwidth and power allocation for sum ergodic capacity under fading channels in cognitive radio networks’, IEEE Trans. Signal Process., 2011, 59, (4), pp. 18141826.
    10. 10)
      • 3. Ata, O.W., Seki, H., Paulraj, A.: ‘Capacity enhancement in quad-sector cell architecture with interleaved channel and polarization assignments’. Proc. of ICC'01, Helsinki, Finland, June 2001, vol. 7, pp. 23172321.
    11. 11)
      • 13. Choudhury, S., Gibson, J.D.: ‘Ergodic capacity, outage capacity, and information transmission over Rayleigh fading channels’. Proc. of the Information Theory and Applications Workshop, January 2007.
    12. 12)
      • 11. ETSI: ‘LTE; evolved universal terrestrial radio access (E-UTRA); radio frequency (RF) system scenarios (3GPP TR 36.942 version 8.2.0 Release 8)’. Technical Report, ETSI, 2009.
    13. 13)
      • 16. Rupp, M., Schwarz, S., Taranetz, M.: ‘The Vienna LTE-advanced simulators’ (Springer, Singapore, 2016).
    14. 14)
      • 1. Wang, L.C., Leung, K.K.: ‘Performance enhancement by narrow-beam quad-sector cell and interleaved channel assignment in wireless networks’. Proc. of Globecom'99, Rio de Janeiro, Brazil, December 1999, vol. 5, pp. 27192724.
    15. 15)
      • 9. Kammoun, A., Khanfir, H., Altman, Z., et al: ‘Preliminary results on 3D channel modeling: from theory to standardization’, IEEE Trans. Sel. Areas Commun., 2014, 32, (6), pp. 12191229.
    16. 16)
      • 5. Kang, X., Liang, Y.-C., Nallanathan, A., et al: ‘Optimal power allocation for fading channels in cognitive radio networks: ergodic capacity and outage capacity’, IEEE Trans. Wirel. Commun., 2009, 8, (2), pp. 940950.
http://iet.metastore.ingenta.com/content/journals/10.1049/iet-com.2016.0881
Loading

Related content

content/journals/10.1049/iet-com.2016.0881
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading