Acta Metallurgica Sinica(English letters)

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Block diagonalization coordinated transmission with zero-forcing in MIMO broadcast


  1. 1. Shandong Computer Science Center, Jinan 250014, China 2. Shandong Provincial Key Laboratory of Computer Network,Jinan 250014, China
  • Received:2010-09-20 Revised:2011-04-08 Online:2011-06-30 Published:2011-06-30
  • Contact: Yachen WANG
  • Supported by:

    This work was supported by the Shandong Province Natural Science Foundation (ZR2010FQ008).


This work has investigated coordinated multiple-input multiple-output (MIMO) transmission schemes in an interference-limited cellular downlink. It has proposed a novel block diagonalization (BD) coordinated transmission scheme, which combines with zero-forcing (ZF) criterion. In the scheme, the BD technique has advantages in suppressing multi-user interference while the ZF technique enables to mitigate interference among spatial data streams for a user. Based on the proposed coordinated scheme, an efficient power allocation is also put forward. The analyses show that the ergodic capacity of the proposed coordinated scheme is that of the MIMO channel with the maximum transmit power at each transmitter. Computer simulations demonstrate the effectiveness of the proposed coordinated scheme and its corresponding power allocation.

Key words:

BD, cellular systems, coordinated transmission, MIMO, power allocation, ZF