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Smart Antenna Based OVSF Code Assignment for WCDMA Networks

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Abstract

This paper presents a new method for dynamic allocation of orthogonal variable spreading factor (OVSF) codes in WCDMA networks where each base station is equipped with an adaptive antenna array (AAA). Previous works about OVSF code assignment problem deal with the code limited case. Here, we investigate the feasibility to turn the problem into the SIR limited case. With our scheme, the new call request is allocated an OVSF code that may be currently used by an active user whose downlink beam has the smallest spatial correlation with the channel vector of the requesting user, as long as desired SIR level is achieved. The performance of the new scheme is justified through computer simulations under different traffic load conditions.

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References

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Authors and Affiliations

  1. Wireless Communications and Information Systems Research Center, Department of Computer Engineering, Kocaeli University, Izmit, Kocaeli, 41040, Turkey

    Adnan Kavak & Mustafa Karakoc

  2. Radio Network Division, Turkcell Telecommunication Services, Kartal, Istanbul, 34880, Turkey

    Mustafa Karakoc

Authors
  1. Adnan Kavak
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  2. Mustafa Karakoc
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Correspondence to Adnan Kavak.

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Kavak, A., Karakoc, M. Smart Antenna Based OVSF Code Assignment for WCDMA Networks. Wireless Pers Commun 43, 1761–1766 (2007). https://doi.org/10.1007/s11277-007-9343-7

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  • DOI: https://doi.org/10.1007/s11277-007-9343-7

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