適用於IEEE 802.16系統並運用極座標架構之低複雜度MIMO STBC頻域等化器設計

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姓名

黃英誠(Ying-Chen Huang) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

適用於IEEE 802.16系統並運用極座標架構之低複雜度MIMO STBC頻域等化器設計
(A Cost Efficient Design of Polar Coordinates Based MIMO STBC FEQ for IEEE 802.16 OFDM System)

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摘要(中)

龐大的潛在商機，使得無線通訊一直是熱門領域之一。近年來，多輸入多輸出(Multiple-Input Multiple-Output, MIMO)技術更是被熱烈探討的議題，高傳輸速率與傳輸品質，使得通訊領域的各個研究單位無不投入大量心力進行研究，以期望能對下一代無線通訊盡一番心力。
本論文亦將研究議題放在多輸入多輸出正交分頻多工技術，以802.16標準為系統架構，對多輸入多輸出技術各種相關應用之中的時空區域編碼進行實體層技術探討。相對於單輸入單輸出技術，多輸入多輸出的硬體成本遠遠高出許多，在此我們利用座標系的轉換，將原先操作於直角座標系的STBC解碼轉到極座標系，以降低成本。並針對時變通道效應，提出多輸入多輸出的LMS通道追蹤演算法，以對時變通道資訊進行追蹤。其中我們利用C程式建立傳送機平台與通道模型，並對通道估測、STBC解碼與LMS通道追蹤演算法進行C程式模擬與Verilog程式硬體實現。

摘要(英)

Wireless communication has been one of the most popular fields due to its enormously potential opportunities. Among the techniques involved in such an area, the Multiple-Input Multiple-Output (MIMO) has emerged as one of the hotest issues discussed recently in virtue of its high transmission rate as well as fine transmission quality. Many groups worldwide are dedicated their vigor to the improvement in such a technique.
In this thesis the discussions of physical-layer techniques with respect to the space-time coding for MIMO-OFDM system in IEEE 802.16 are addressed. To resolve the higher hardware implementation cost in MIMO compared with the Single-Input Single-Output (SISO), a coordinate transformation has been employed to translate the STBC decoding of Cartesian coordinates into the decoding of polar coordinates. In addition, a new LMS channel tracking algorithm, aimed at the effect of channel time variations, is proposed to conduct tracking for time-variant channel. A transmitter platform as well as a channel model was built by C programming. Simulations and actual implementations for channel estimation, STBC decoding, and LMS channel tracking algorithm have also been carried out in C and Verilog.

關鍵字(中)

★ 時空區域編碼
★ 多輸入多輸出
★ LMS通道追蹤演算法

關鍵字(英)

★ LMS channel tracking algorithm
★ MIMO
★ STBC

論文目次

摘要........................................................................................................................i
Abstract...............................................................................................................iii
目錄.......................................................................................................................v
表目錄..................................................................................................................ix
第一章...................................................................................................................1
1-1 背景與動機..........................................................................................1
1-2 無線都會網路簡介..............................................................................2
1-3 論文結構..............................................................................................3
第二章...................................................................................................................4
2-1 正交分頻多工技術..............................................................................4
2-2 多輸入多輸出技術..........................................................................6
第三章.................................................................................................................10
3-1 多路徑瑞雷衰減通道........................................................................10
3-2 多輸入多輸出通道模型....................................................................13
3-3 加成性白色高斯雜訊 (Additive White Gaussian Noise, AWGN)14
第四章.................................................................................................................15
4-1 IEEE 802.16系統規格.................................................................15
4-2 傳送機................................................................................................17
第五章.................................................................................................................21
5-1 時空區塊編碼....................................................................................21
5-2 通道估測............................................................................................23
5-3 多輸入多輸出LMS通道追蹤演算法...............................................28
5-4 極座標系之時空區域編碼................................................................30
5-5 C程式模擬結果.................................................................................35
第六章.................................................................................................................42
6-1 設計流程............................................................................................42
6-2 極座標系STBC解碼電路實現........................................................44
6-3 通道估測單元....................................................................................48
6-4 極座標系 STBC解碼與LMS通道追蹤電路................................52
6-5 極座標系與直角座標系STBC與LMS電路成本比較................56
6-6 Verilog程式模擬結果....................................................................57
第七章.................................................................................................................59
參考文獻.............................................................................................................60

參考文獻

[1] IEEE Std 802.16-2005, Standard for Local and Metropolitan Area Networks
Part 16: Air Interface for Fixed Broadband Wireless Access Systems
[2] P.W. Wolniansky, G.J. Foschini, G.D. Golden, and R.A. Valenzuela, ”V-BLAST: an architecture for realizing very high data rates over the rich-scattering wireless channel,” in URSI International Symposium on Signals, Systems, and Electronics, Oct. 1998, pp.295-300.
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[6] Vinko Erceg, Hemanth Sampath, and Severine Catreux-Erceg, “Dual-Polarization Versus Single-Polarization MIMO Channel Measurement Results and Modeling,” IEEE Transactions on Wireless Communications, Vol.5, No.1, January 2006.
[7] “Channel Models for Fixed Wireless Applications,” IEEE 802.16 Broadband Wireless Access Working Group, 802.16.3c-01/29r4, Jul. 16, 2001
[8] Yunxin Li and Xiaojing Huang, “The Generation of Independent Rayleigh Faders,”
[9] Bernard Widrow and Samuel D. Stearns, “Adaptive Signal Processing,” Prentice-Hall
[10] Pei-Yun Tzai, “Lad 4 Arctangent Function,” Digital Communication Circuit Design Lad.
[11] Pei-Yun Tzai, “Lad 5 Magnitude Function,” Digital Communication Circuit Design Lad.
[12] Rizwan Mudassir and Z. Abid, “New Parallel Multipliers Based on Low Power Adders,” Electrical and Computer Engineering, 2005. Canadian Conference, Saskatoon, May 2005

指導教授

薛木添(Muh-Tian Shiue)

審核日期

2007-7-24

推文