Multiuser diversity and adaptive bit loading for OFDM-based spectrum agile radios

被引：0
|
作者：
Yaddanapudi, Prasad [1 ]
Raju, G. V. S. [1 ]
Popescu, Dimitrie C. [2 ]
机构：
[1] Univ Texas San Antonio, ECE Dept, San Antonio, TX 78249 USA
[2] Old Dominion Univ, ECE Dept, Norfolk, VA 23529 USA
来源：
2008 IEEE RADIO AND WIRELESS SYMPOSIUM, VOLS 1 AND 2 | 2008年
关键词：
D O I：
10.1109/RWS.2008.4463443
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper we discuss exploiting multiuser diversity and adaptive modulation in conjunction with spectral load smoothing (SLS) as a medium access control protocol for spectrum agile radios (SAR) in a multiuser OFDM/OFDMA based wireless communication system operating in frequency selective fading channel. The ability of the spectrum agile radios to identify unused spectrum can be used effectively to assign sub-carriers and bits adaptively depending on the user's channel state information in a distributed fashion. We illustrate by simulation the performance improvement in terms of the bit error rate obtained for a multiuser OFDM system when multiuser diversity and adaptive bit loading is used in combination with SLS.
引用
收藏
页码：121 / +
页数：2
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