Between Dec 19, 2024 and Jan 2, 2025, datasets can be submitted to DRUM but will not be processed until after the break. Staff will not be available to answer email during this period, and will not be able to provide DOIs until after Jan 2. If you are in need of a DOI during this period, consider Dryad or OpenICPSR. Submission responses to the UDC may also be delayed during this time.
 

MIMO Wireless Communications with limited feedback

Loading...
Thumbnail Image

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

MIMO Wireless Communications with limited feedback

Published Date

2012-09

Publisher

Type

Thesis or Dissertation

Abstract

In this dissertation, we investigate the effects of having imperfect channel state information due to limited training and feedback resources in multi-user systems with multiple antennas. We find that while the achievable rate is highly sensitive to the quality of channel training and feedback, the rate gap relative to the rate achievable with perfect channel information can be uniformly bounded for all values of signal-to-noise ratio, with proper design of the feedback link to acquire accurate channel information, that is, the multiplexing gain can be preserved. Further, when a large number of users are present in a system, we find the strong requirement for accurate channel information remains, contrary to many transmission strategies that are commonly proposed for this regime. We conclude that given a limited feedback budget, it is desirable to first use resources to acquire highly accurate channel information, and only then allocate resources to exploit multi-user diversity. We also obtain results characterizing the statistics of random subspace quantization, which we use to compute the reduction in feedback overhead possible when this form of quantization is used. Finally, we consider open-loop multi-hop ad hoc networks with multiple antennas and opportunistic routing, and investigate using multiple antennas to optimize the spatial reuse, per-hop length and per-hop rate to maximize end-to-end performance.

Description

University of Minnesota Ph.D. dissertation. September 2012. Major: Electrical Engineering. Advisor: Professor Nihar Jindal. 1 computer file (PDF); vii, 120 pages.

Related to

Replaces

License

Collections

Series/Report Number

Funding information

Isbn identifier

Doi identifier

Previously Published Citation

Other identifiers

Suggested citation

Ravindran, Niranjay. (2012). MIMO Wireless Communications with limited feedback. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/143610.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.