Spectral-efficiency of multi-antenna links in ad-hoc wireless networks with limited Tx CSI

• Main Authors: Govindasamy, Siddhartan (Author), Bliss, Daniel W., Jr (Author), Staelin, David H. (Contributor)
• Other Authors: Lincoln Laboratory (Contributor), Massachusetts Institute of Technology. Research Laboratory of Electronics (Contributor), Bliss, Daniel W. Jr (Contributor)
• Format: Article
• Language: English
• Published: Institute of Electrical and Electronics Engineers (IEEE), 2012-09-21T18:24:58Z.
• Subjects: Article
• Online Access: Get fulltext

An asymptotic expression is derived for the mean spectral efficiency of multi-antenna links randomly distributed on a plane in a uniform manner where transmitters (Tx) have Channel-State-Information (CSI) of the channels between themselves and their target receivers while receivers (Rx) have CSI between themselves and all transmitters. The mean per-link spectral efficiency in the network is found to increase if nodes transmit using a subset of their strongest channel modes instead of the link-optimal strategy of water-filling on all channel modes (Farrokhi et al.). For reasonable parameters, this system which requires limited Tx CSI, has approximately double the mean spectral efficiency of systems without Tx CSI.
National Science Foundation (U.S.). (Grant number ANI-0333902)