Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback

Details Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback

2007-03-03

arxiv.org/abs/cs/0703016v3

Computer Science

Information Theory

Submitted to IEEE Transactions on Communications Jan 2007, Revised Jun 2007, Revised Nov 2007

Scientific paper

We investigate the effect of feedback delay on the outage probability of multiple-input single-output (MISO) fading channels. Channel state information at the transmitter (CSIT) is a delayed version of the channel state information available at the receiver (CSIR). We consider two cases of CSIR: (a) perfect CSIR and (b) CSI estimated at the receiver using training symbols. With perfect CSIR, under a short-term power constraint, we determine: (a) the outage probability for beamforming with imperfect CSIT (BF-IC) analytically, and (b) the optimal spatial power allocation (OSPA) scheme that minimizes outage numerically. Results show that, for delayed CSIT, BF-IC is close to optimal for low SNR and uniform spatial power allocation (USPA) is close to optimal at high SNR. Similarly, under a long-term power constraint, we show that BF-IC is close to optimal for low SNR and USPA is close to optimal at high SNR. With imperfect CSIR, we obtain an upper bound on the outage probability with USPA and BF-IC. Results show that the loss in performance due to imperfection in CSIR is not significant, if the training power is chosen appropriately.

Affiliated with

Also associated with

No associations

Rating

Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback 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 Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Outage Probability of Multiple-Input Single-Output (MISO) Systems with Delayed Feedback will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-719919