Computer Science – Information Theory
Scientific paper
2012-01-08
Computer Science
Information Theory
Submitted to IEEE Transactions on Communications
Scientific paper
We consider the multi-user MIMO broadcast channel with M single-antenna users and N transmit antennas under the constraint that each antenna emits signals having constant envelope (CE). The motivation for this is that CE signals facilitate the use of power-efficient RF power amplifiers. Analytical and numerical results show that, under certain mild conditions on the channel gains, for a fixed M, an array gain of O(N) is achievable even under the stringent per-antenna CE constraint (essentially, for a fixed M, at sufficiently large N the total transmitted power can be reduced linearly with increasing N while maintaining a fixed information rate to each user). We also propose a precoding scheme which finds near-optimal CE signals to be transmitted, and has O(MN) complexity. Also, in terms of the total transmit power required to achieve a fixed desired information sum-rate, despite the stringent per-antenna CE constraint, the proposed CE precoding scheme performs close to the sum-capacity achieving scheme for an average-only total transmit power constrained channel.
Larsson Erik G.
Mohammed Saif Khan
No associations
LandOfFree
Per-antenna Constant Envelope Precoding for Large Multi-User MIMO Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Per-antenna Constant Envelope Precoding for Large Multi-User MIMO Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Per-antenna Constant Envelope Precoding for Large Multi-User MIMO Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-350