How much training is needed in fading multiple access channels?

Jonathan Scarlett, Jamie Scott Evans, Subhrakanti Dey

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

1 Citation (Scopus)

Abstract

We optimize the tradeoff between multiuser diversity and training overhead in a single antenna narrowband multiple access channel with a large number of users. A block fading model with independent Rayleigh gains is considered, in which training sequences are sent to the base station one at a time and the user estimated to be the strongest is scheduled to transmit. Considering a lower bound on the ergodic sum capacity with channel uncertainty under an average total power constraint, we optimize the proportion of time and power spent on training in each block. By analyzing the asymptotic behavior of the system as the block length grows large, we optimize the number of users considered for transmission in each block with respect to an approximate expression for the achievable rate, and find first order expressions for the resulting parameters.
Original languageEnglish
Title of host publication2011 8th International Symposium on Wireless Communication Systems (ISWCS)
EditorsGerhard Kramer, Kwang-Cheng Chen
Place of PublicationUSA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages527 - 531
Number of pages5
ISBN (Print)9781612844039
DOIs
Publication statusPublished - 2011
Externally publishedYes
EventInternational Symposium on Wireless Communication Systems 2011 - Aachen Germany, Aachen, Germany
Duration: 6 Nov 20119 Nov 2011
Conference number: 8th
https://www.ti.rwth-aachen.de/iswcs2011/

Conference

ConferenceInternational Symposium on Wireless Communication Systems 2011
Abbreviated titleISWCS 2011
CountryGermany
CityAachen
Period6/11/119/11/11
Internet address

Cite this

Scarlett, J., Evans, J. S., & Dey, S. (2011). How much training is needed in fading multiple access channels? In G. Kramer, & K-C. Chen (Eds.), 2011 8th International Symposium on Wireless Communication Systems (ISWCS) (pp. 527 - 531). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ISWCS.2011.6125414