標題: 應用在IEEE 802.11g上頻域等化與資料解碼的結合
Combination with Frequency Domain Equalization and Data Demapping
作者: 蔡爵安
Chueh-An Tsai
許騰尹
Terng-Yin Hsu
資訊科學與工程研究所
關鍵字: 等化;通道估計;無線;直接序列展頻;equalization;channel estimation;wireless;DSSS
公開日期: 2004
摘要: A procedure against heavy multipath is developed in this thesis, which combines equalization with CCK codewords demapping and is based on conditioned maximum likelihood (ML) criterion in frequency domain by means of only one DFT. These techniques is applied to dual mode system IEEE 802.11g so that ERP-DSSS/CCK mode can share DFT and point by point multiplier of ERP-OFDM mode and reach the purpose of hardware saving, instead of huge DFE in most solutions of IEEE 802.11g ERP-DSSS/CCK mode. However, 802.11g systems are now being used in home, office and warehouse environments where the multipath delay can be much greater on the order of about 150ns. Such environments require the use of equalization for acceptable performance. According to simulation results under IEEE 802.11g and JTC indoor multipath models, the concepts of joint equalization and CCK demapping not only provide acceptable accomplishment but also improve the performance of the system substantially over separate equalization and demapping.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT009217609
http://hdl.handle.net/11536/74146
Appears in Collections:Thesis


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  1. 760901.pdf