ICC 2010, IEEE International Conference on Communications, 23-27 May, 2010, Cape Town, South Africa
In this paper we compare general unitary beamforming to constant modulus unitary beamforming in terms of achievable sum-rate for MIMO broadcast channels. We give a complete analysis of both schemes in the $2times 2$ multi-user MISO configuration. Furthermore, we study the regime of asymptotically high signal-to-noise ratio. For growing number of transmit antennas the sum-rate gap between both schemes is significantly increasing. Simulations are carried out that corroborate our analytical results.
Type:
Conference
City:
Cape Town
Date:
2010-05-23
Department:
Communication systems
Eurecom Ref:
3037
Copyright:
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