3D MIMO在無線攜能通信系統(tǒng)中的應用和優(yōu)化設計

范立行; 華夢; 黃永明; 楊綠溪

doi:10.11999/JEIT170751

3D MIMO在無線攜能通信系統(tǒng)中的應用和優(yōu)化設計

doi: 10.11999/JEIT170751

基金項目:

國家自然科學基金(61372101, 61422105)，國家863重大項目(2015AA01A703)，江蘇省科技計劃項目(BE2015156)

計量
- 文章訪問數(shù): 989
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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2017-07-25
- 修回日期: 2017-12-15
- 刊出日期: 2018-05-19

Application and Optimal Design of 3D MIMO for Simultaneous Wireless Information and Power Transfer

Funds:

The National Natural Science Foundation of China (61372101, 61422105), The National 863 Project of China (2015AA01A703), The Research Project of Jiangsu Province (BE2015156)

摘要

摘要: 為了提高無線攜能通信(SWIPT)的效率，在基站采用3維(3D)定向天線，通過動態(tài)調(diào)整天線下傾角，來開發(fā)垂直維度，從而增強SWIPT中能量和信息的傳輸效率。該文研究單小區(qū)多輸入多輸出(MIMO)SWIPT系統(tǒng)，基站和用戶分別使用迫零(ZF)預編碼和功率劃分(PS)技術。構建以最小化發(fā)送功率為目標的優(yōu)化問題，在信噪比(SNR)和獲取功率的約束下，聯(lián)合優(yōu)化了天線下傾角，PS比和分配的功率。最佳PS比和最優(yōu)功率分配以閉合表達式給出。仿真表明，所得到的優(yōu)化解的性能優(yōu)于具有可調(diào)下傾角的常規(guī)MIMO系統(tǒng)和不考慮垂直維度的2維(2D)方案。
- 無線攜能通信 /
- 3D MIMO /
- 基站天線下傾角 /
- 功率劃分
Abstract: In order to improve the Simultaneous Wireless Information and Power Transfer (SWIPT) efficiency, the Base Station (BS) employs the Three-Dimensional (3D) directional antennas and exploits the vertical domain by dynamically adjusting the antenna tilt. So the efficiency of energy and information transfer can be increased. The single-cell Multiple-Input Multiple-Output (MIMO) SWIPT system is studied where the BS applies Zero-Forcing (ZF) precoding and users use the Power Splitting (PS) technique. The optimization problem is formulated to minimize the transmit power subject to SNR and harvested power targets. And the antenna tilt, PS ratios and the allocated power of each user are jointly optimized. The optimal PS ratios and the optimal power allocation are given in closed-form expressions. Simulations show that the proposal outperforms conventional MIMO systems with an adjustable tilt and the Two-Dimensional (2D) scheme without considering the vertical domain.
- Simultaneous Wireless Information and Power Transfer (SWIPT) /
- 3D MIMO /
- Base Station (BS) antenna tilt /
- Power splitting

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參考文獻(17)

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