Measuring the Closed-Loop Throughput of 2x2 HSDPA over TX Power and TX Antenna Spacing

  • Sebastian Caban
  • José A. García-Naya
  • Christian Mehlführer
  • Luis Castedo
  • Markus Rupp
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 45)

Abstract

Mobile network operators demand small base station antennas and high physical layer throughputs. In the downlink, high physical layer throughputs can be achieved by exploiting transmit diversity. Given that the correlation between different propagation paths reduces the achievable throughput, it is commonly conjectured that the greater the transmit antenna spacing, the better the radio link performance. The open question is, how much does the throughput of a communication system actually change over antenna spacing?

We answer this question by closed-loop throughput measurements at 2.5 GHz for standard compliant 2× 2 HSDPA in a realistic, urban, outdoor scenario. The results are presented in terms of physical layer throughput over TX antenna spacing and TX power. We arrive at the somehow surprising conclusion that, for typical TX power values and typical antenna spacings, the throughput remains approximately independent with respect to the antenna spacing.

Keywords

Antenna diversity Antenna spacing Measurement MIMO systems Radio communications HSDPA 

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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2010

Authors and Affiliations

  • Sebastian Caban
    • 1
  • José A. García-Naya
    • 2
  • Christian Mehlführer
    • 1
  • Luis Castedo
    • 2
  • Markus Rupp
    • 1
  1. 1.Institute of Communications and Radio-Frequency EngineeringVienna University of TechnologyViennaAustria
  2. 2.Department of Electronics and SystemsUniversity of A CoruñaA CoruñaSpain

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