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Optimal transmissions for space-time coded OFDM UWB systems

Optimal transmissions for space-time coded OFDM UWB systems
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摘要 The emerging ultra-wideband (UWB) system offers a great potential for the design of high-speed short-range communications.Compared with great progress at physical layer,the corresponding medium access control (MAC) layer designs are naturally placed on the schedules.We focus on the optimal power load scheme,which is an integral part of the MAC layer protocol design,for UWB space-time coded (STC) orthogonal frequency-division multiplexing (OFDM) transmissions.Assumed the transmitter has perfect or partial channel stage information (CSI).Based on the optimization criteria of maximizing capacity,three kinds of power load schemes were presented with different tradeoff among performance,complexity and feedback bandwidth overhead.The proposed schemes are verified and compared under the channel prototype proposed by IEEE 802.15.3a Task Group. The emerging ultra-wideband （UWB） system offers a great potential for the design of high-speed short-range communications. Compared with great progress at physical layer, the corresponding medium access control （MAC） layer designs are naturally placed on the schedules. We focus on the optimal power load scheme, which is an integral part of the MAC layer protocol design, for UWB space-time coded （STC） orthogonal frequency-division multiplexing （OFDM） transmissions. Assumed the transmitter has perfect or partial channel stage information （CSI）. Based on the optimization criteria of maximizing capacity, three kinds of power load schemes were presented with different tradeoff among performance, complexity and feedback bandwidth overhead. The proposed schemes are verified and compared under the channel prototype proposed by IEEE 802.15.3a Task Group.
作者 WANG Jun-fang ZHU Guang-xi JIN Jiang
机构地区 Dept. of Electronics ＆ Information Engineering National Laboratory for Optoelectronics
出处 《通信学报》 EI CSCD 北大核心 2005年第10期29-33,共5页 Journal on Communications
基金 This work was partially supported by NSF under Grant 60496315 and national "863" projects under Grant2003AA12331005
关键词 UWB系统 传输模式 时空编码 多路技术 OFDM 媒介访问控制 ultra-wideband（UWB）： orthogonal frequency-division multiplexing （OFDM）： space-time coded （STC）：power load： medium access control （MAC）
分类号 TN91 [电子电信—通信与信息系统]
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参考文献13

  • 1IEEE P802.15. Multi-band OFDM Physical Layer Proposal[S]. IEEE P802.15-03/268r0-TG3a, 2003.
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通信学报
2005年 第10期

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