Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (6): 68-71.doi: 10.13190/jbupt.201006.68.tianxj

• Papers • Previous Articles     Next Articles

Phase Rotation Precoding for Orthogonalized Spatial Multiplexing System

  

  • Received:2009-11-20 Revised:2010-06-23 Online:2010-12-28 Published:2011-01-07

Abstract:

To decrease feedback overhead, a phase rotation precoding for orthogonalized spatial multiplexing (PROSM) system is proposed, in which a proper rotation is set at the imaginary part of modulated signals. Compared with the power allocation precoding of OSM (PLOSM), the feedback information of this scheme is decreased and the complexity of calculating precoding parameter is also reduced. Simulation results show that with the same reliability of PLOSM, the proposed scheme saves four bits feedback overhead.

Key words: orthogonalized spatial multiplexing, precoding, phase rotation