Multiuser diversity for MIMO wireless systems with linear receivers


Robert W. Heath Jr, M. Airy, and A.J. Paulraj


Proc. of IEEE Asilomar Conf. on Signals, Systems, and Computers, Pacific Grove, California, Nov. 4 - 7, 2001.


MIMO communication links, i.e. those with multiple transmit and receive antennas, offer significant advantages in terms of rate and reliability. In cellular systems, however, gains may be limited due to fading and interference. One potential solution is known as multiuser diversity, in which a packet scheduler improves throughput by exploiting the independence of the fading and interference statistics of different users. In this paper, we consider the problem of exploiting multiuser diversity in MIMO systems, especially those with zero forcing linear receivers. We propose a number of different scheduling disciplines and compare them in terms of average throughput as a function of the number of users and number of antennas.



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