کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
725794 1461243 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Channel quality-to-interference ratio quantization criterion for limited feedback beamforming in MIMO systems
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Channel quality-to-interference ratio quantization criterion for limited feedback beamforming in MIMO systems
چکیده انگلیسی

The discrete Fourier transform (DFT)-based codebook is employed in this paper to quantize channel state information so that the amount of feedback can be reduced in the multiple input multiple output (MIMO) downlink of long term evolution (LTE) system. And a novel beamforming (BF) scheme based on the proposed channel quality-to-interference (QIR) quantizing criteria is developed, which uses only the index of the optimal codebook for the beamforming at the base station (BS), and dramatically reduces the amount of feedback. The proposed BF scheme jointly considers the influences of the quality of the quantized channels and the mutual interference among the sub-channels. The extensive simulation results verify that throughput of the proposed BF scheme is better than that of the random BF with a little feedback, and that of the eigen-beamforming even under low signal noise ratio (SNR) scenario.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of China Universities of Posts and Telecommunications - Volume 19, Issue 3, June 2012, Pages 17-21