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Conference Paper
Adaptive Beam Tracking for Interference Alignment in Time-varying MIMO Interference Channels: Conjugate Gradient Approach
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- Authors
- Junse Lee, Heejung Yu, Youngchul Sung, Yong H. Lee
- Issue Date
- 2011-05
- Citation
- International Conference on Acoustics, Speech and Signal Processing (ICASSP) 2011, pp.3364-3367
- Language
- English
- Type
- Conference Paper
- Project Code
- 10MI3500, Research on Radio Transmission Technology for IEEE 802.11 VHT WLAN, Sok-Kyu Lee
- Abstract
- Based on a linear formulation to interference alignment, an adaptive algorithm for interference-aligning beam tracking in time-varying MIMO interference channels is proposed. It is shown that obtaining the interference-aligning beam vector is equivalent to minimizing a certain Rayleigh quotient, and the conjugate gradient approach is adopted to construct an adaptive algorithm. The convergence and stability of the proposed algorithm are established in static channel case, and numerical results show that the proposed algorithm performs well compared with other existing methods with much less complexity. © 2011 IEEE.
- KSP Keywords
- Conjugate Gradient(CG), Gradient approach, Interference Alignment(IA), MIMO interference channels, Numerical results, Rayleigh quotient, an adaptive algorithm, beam tracking, time-varying