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標題: | 2 × n 時空區塊碼之可適性功率分配 Adaptive Power Allocation for 2 × n Space-Time Block Coding |
作者: | Jason Wang 王禎毅 |
指導教授: | 鄭士康(Shyh-Kang Jeng) |
關鍵字: | 可適性功率分配,時空區塊碼,無線通訊, adaptive power allocation,space-time block coding,space-time coding,antenna array processing,diversity,wireless communications, |
出版年 : | 2008 |
學位: | 碩士 |
摘要: | In this paper, we explore the application of adaptive power allocation to 2 × nr space-time block code (STBC) systems, where nr specifies an arbitrary number of antennas at the receiver. We demonstrated how a fixed amount of transmit power allocated among the transmit antennas in different quantities can result in an improved bit error rate (BER) performance. Using a feed-back link between the transmitter and receiver, adaptive power allocation can also be used to improve the system capacity or minimize the transmit power of a system while satisfying a threshold BER equirement. Our method for allocating the transmit power is compared with the conventional power allocation method of water-filling and with a hypothetical capacity-constrained waterfilling method. The case of imperfect channel estimation at the receiver is also analyzed for its effects on the performance of adaptive power allocation. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/40741 |
全文授權: | 有償授權 |
顯示於系所單位: | 電機工程學系 |
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