LIU Jian-guo, YANG Lu-xi. Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback[J]. Acta Electronica Sinica, 2007, 35(6A): 78-82.
LIU Jian-guo, YANG Lu-xi. Precoding and Power Allocation Based on Double Codebook in MIMO Systems with Limited Feedback[J]. Acta Electronica Sinica, 2007, 35(6A): 78-82.DOI:
Recent research results show that limited feedback precoding proves effective in increasing rrancmiccion rate in the multiple-input multiple-output(NIIMO) system
fiuther performance gain can be achieved if power control is used along with limited feedback precoding at transmitter.In order to maximize the spectral efficiency of the finite-rate feedback MIMO systems
a novel power allocation and precodictg scheme is proposed based on adative modulation.Furthermore
we feed back the preceding matrix and power vector through double codebooks for reducing the feedback overhead
and a new codebook design approach for power vector based on the clustering analysis is developed.Simulation results show that the proposed scheme greatly improves the spectral efficiency with low feedback overfiead