Multiuser Bit-Interleaved Coded OFDM with Limited Feedback Information 


Vol. 33,  No. 2, pp. 107-114, Feb.  2008


PDF Full-Text
  Abstract

In wireless access systems, there has been much interest in enhancing the performance of orthogonal frequency division multiplexing OFDM) in a frequency selective fading channel. If the channel is static and is perfectly known to both the transmitter and the receiver, the water-filling technique with adaptive modulation is known to be optimal[1]. However, for OFDM systems, this requires intensive traffic overheads for reporting channel side information on all subcarriers to the transmitter. In this paper, we propose an adaptive modulation and coding scheme for bit-interleaved coded OFDM (BIC-OFDM) for downlink packet transmissions with reduced feedback information. To minimize the feedback information, we employ a rate adaptation method based on the OFDM symbol rather than on each subcarrier. To illustrate the performance gap between the optimal water-filling and the proposed scheme, we will compare cutoff rates for both schemes. It is shown that the loss is less than 2㏈ while the proposed scheme significantly reduces the feedback payloads. Also, the OFDM system in multiuser environment with subcarrier grouping is considered. It is shown that by exploiting multiuser diversity the throughput of the proposed scheme approaches the channel outage capacity as the number of users and the number of subcarrier groups increase.

  Statistics
Cumulative Counts from November, 2022
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.


  Cite this article

[IEEE Style]

C. K. Sung, J. Kim, I. Lee, "Multiuser Bit-Interleaved Coded OFDM with Limited Feedback Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 2, pp. 107-114, 2008. DOI: .

[ACM Style]

Chang Kyung Sung, Jihoon Kim, and Inkyu Lee. 2008. Multiuser Bit-Interleaved Coded OFDM with Limited Feedback Information. The Journal of Korean Institute of Communications and Information Sciences, 33, 2, (2008), 107-114. DOI: .

[KICS Style]

Chang Kyung Sung, Jihoon Kim, Inkyu Lee, "Multiuser Bit-Interleaved Coded OFDM with Limited Feedback Information," The Journal of Korean Institute of Communications and Information Sciences, vol. 33, no. 2, pp. 107-114, 2. 2008.

Search
(IN TITLE, AUTHOR, ABSTRACT,KEYWORDS)

Advanced Search ▼

POPULAR KEYWORDS
(TOP 10 KEYWORDS)

Recent Publications
(LAST 3 YEARS)






pISSN : 1226 - 4717
eISSN : 2287 - 3880