正交分頻多工系統之前導碼排列方式研究

STUDIES OF PILOT PATTERN FOR OFDM SYSTEMS

陳培宗(Pei-Chung Chen)

指導教授 ： 許超雲

大同大學/電機資訊學院/通訊工程研究所/碩士(2007年)

摘要

現代數位通訊對高效率傳輸要求越來越提高,所以尋找提高傳輸效率的方法一直是大家追求
的重點. 而本篇論文主要在透過電腦模擬驗證,在相同的前導碼密度(pilot density)條件
下, 使用不同的前導碼排列方式(pilot pattern)可以提高系統傳輸效率及透過電腦模擬證
明鑽石形排列方式具有最高的傳輸效率.

關鍵字

OFDM ； pilot ； channel estimation

並列摘要

The modern digital communications are more and more enhances to high
efficiency transmission request, therefore to find a way to enhances data
transmission efficiency is popular subject. A communications signal
transmission over wireless channels, that in practice has suffers much
interference and noise influence. Especially, the practice channel is time
variance, which have different channel characteristic at different time. This
thesis mainly to proof that we can enhance the transmission efficiency by
change pilot pattern alignment at same pilot density condition, and to verify
the pilot pattern arrangement in diamond shape have highest transmission
efficiency then any other, by simulation manner.

並列關鍵字

正交分頻多工 ； 前導碼 ； 通道估測

參考文獻

[1] Richard van Nee and Ramjee Prasad, OFDM for Wireless Multimedia

Communications, Artech House, 2000.

[2] Simon Haykin, and Michael Moher, Modern Wireless Communications, Prentice

Hall, 2005.

Pattern Design for OFDM Systems in Rayleigh Fading,” IEEE Trans.