A reverselink beamforming based on simplex downhill algorithm for time-varying channel environments

Joonsung Lee, Changheon Oh, Chungyong Lee

Research output: Contribution to journalConference article

Abstract

New beamforming method based on simplex downhill optimaization process has been presented for the reverse link CDMA systems. The proposed system performs code-filtering at each antenna for each user. It is shown that for fast fading channels, conventional sqare error based cost functions can yield poor results. A new method is proposed based on a variation of the SINK cost function coupled with optimal time variying channel estimation to improve signal tracking. The new beamforming method gives lower computations and faster convergence properties than existing algorithms in fast filing enviromnment. The simulation results show that the proposed algorithm has a better BER performance in the case of the time-varing channel.

Original languageEnglish
Pages (from-to)232-235
Number of pages4
JournalIEEE Vehicular Technology Conference
Volume58
Issue number1
Publication statusPublished - 2003 Dec 1

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Time-varying Channels
Simplex Algorithm
Beamforming
Cost functions
Cost Function
Channel estimation
Fading channels
Code division multiple access
Channel Estimation
Code Division multiple Access
Antennas
Fading Channels
Convergence Properties
Antenna
Reverse
Filtering
Simulation

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "New beamforming method based on simplex downhill optimaization process has been presented for the reverse link CDMA systems. The proposed system performs code-filtering at each antenna for each user. It is shown that for fast fading channels, conventional sqare error based cost functions can yield poor results. A new method is proposed based on a variation of the SINK cost function coupled with optimal time variying channel estimation to improve signal tracking. The new beamforming method gives lower computations and faster convergence properties than existing algorithms in fast filing enviromnment. The simulation results show that the proposed algorithm has a better BER performance in the case of the time-varing channel.",
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A reverselink beamforming based on simplex downhill algorithm for time-varying channel environments. / Lee, Joonsung; Oh, Changheon; Lee, Chungyong.

In: IEEE Vehicular Technology Conference, Vol. 58, No. 1, 01.12.2003, p. 232-235.

Research output: Contribution to journalConference article

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