室內多入多出天線正交分頻多工系統節能演算法之研究

Abstract

在本論文中，多天線輸入多天線輸出正交分頻多工系統節省功率演算法被提出。我們分別考慮兩種不同的情況:(1) 通道狀態資訊在接收端已知;(2) 通道狀態資訊在傳送端已知。另外，以延長一個移動裝置的電池使用時間而言，我們要降低它的總功率消耗其中包含傳送的功率消耗及電路的功率消耗。我們的設計目標是要最小化總功率消耗同時滿足資料傳輸率和位元錯誤率的要求。此論文中揭露了單天線輸入單天線輸出系統較適合使用在路徑損耗小的情形，而分集階數較高的方法適合使用在路徑損耗較大的情形。除此之外，我們所提出的演算法可以利用路徑損耗決定最佳的傳送和接收方式進而減少設計複雜度。

In this thesis, power-saving algorithms for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems are proposed. We design algorithms for two cases individually: (1)channel state information (CSI) is available at receiver; (2)CSI is available at transmitter. Besides, in order to extend the battery life of a mobile device, we should reduce the total power consumption, which includes both transmit power consumption and circuit power consumption. We aim to minimize the total power consumption while meeting the data rate and bit error rate (BER) requirements. It is revealed in this thesis that single-input single-output (SISO) system is preferable in small path loss situations, whereas schemes with higher diversity order are preferable in large path loss situations. Moreover, it is observed that the optimal transmit and receive schemes can be determined by path loss, thus significantly reducing design complexity.