| 研究生: |
莊惠茹 Hui-ju Chuang |
|---|---|
| 論文名稱: |
基於預編碼矩陣旋轉之MIMO-OFDM有限回授方法 Matrix Rotation Based Precoding Method for MIMO-OFDM with Limited Feedback |
| 指導教授: |
張大中
Dah-chung Chang |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
資訊電機學院 - 通訊工程學系 Department of Communication Engineering |
| 畢業學年度: | 100 |
| 語文別: | 中文 |
| 論文頁數: | 50 |
| 中文關鍵詞: | MIMO-OFDM 、預編碼 、有限回授 、矩陣旋轉 |
| 外文關鍵詞: | MIMO-OFDM, Precoding, Limited Feedback, Matrix Rotation |
| 相關次數: | 點閱:12 下載:0 |
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有限回授預編碼技術結合MIMO-OFDM系統,當傳送一個資料序列時,可以提高系統的分集效能以及降低系統錯誤率(BER),若傳送多個資料序列時,系統則可以提高頻譜使用效率增加資料傳送速度。在MIMO-OFDM預編碼系統中,碼簿已廣泛的被使用作為有限回授的依據。當通道是具有相關性,我們提出了矩陣旋轉法來設計子載波的預編碼矩陣降低回授資訊量。這個方法計算一適當旋轉角度並將旋轉角度量化回授到傳送端,相較於改良球形內插法與縮減碼簿法,我們所提出的矩陣旋轉法有較低的位元錯誤率,且其通道容量也比較大。
The limited feedback precoding scheme for MIMO-OFDM systems is a simple technique to exploit spatial diversity and has the advantage of improving bit error rate (BER). In addition, It also increases spectral efficiency and rises transmission throughput rate for multiple data stream transmission. To implement the precoding scheme, using codebook for the precoding matrix has been adopted in limited feedback MIMO-OFDM precoding systems. We propose a rotation matrix method to reduce feedback information for the precoding matrix in temporally correlated channels. The new method calculates an appropriate rotation angle between two successive precoding matrices at the receiver and only the information about the quantized rotation angle is returned to the transmitter. Compared with the widely used interpolation and codebook reduction methods, the proposed method can achieve a lower BER along with higher channel capacity.
參考文獻
[1] D. Love and R. Heath, “Limited feedback unitary precoding for spatial
multiplexing systems,”IEEE Trans. Inf. Theory, vol. 51, no. 8,
pp. 2967–2976, Aug. 2005.
[2] “Approved draft ieee standard for local and metropolitan area networks
corrigendum to ieee standard for local and metropolitan area
networks-part 16: Air interface for fixed broadband wireless access
systems (incorporated into ieee std 802.16e-2005 and ieee std
802.16-2004/cor 1-2005 e),”IEEE Std P802.16/Cor1/D5, 2005.
[3] J. Choi, B. Mondal, and R. Heath, “Interpolation based unitary
precoding for spatial multiplexing mimo-ofdm with limited
feedback,”IEEE Trans. Signal Processing, vol. 54, no. 12, pp.
4730–4740, Dec. 2006.
[4] H. Zhang, Y. Li, V. Stolpman, and N. van Waes, “A reduced csi
feedback approach for precoded mimo-ofdm systems,”IEEE Trans.
Wireless Commun., vol. 6, no. 1, pp. 55–58, Jan. 2007.
[5] B. Hochwald, T. Marzetta, T. Richardson, W. Sweldens, and
R. Urbanke, “Systematic design of unitary space-time constellations,”
IEEE Trans. Inf. Theory, vol. 46, no. 6, pp. 1962–1973, Sep
2000.
[6] I. Telatar, “Capacity of multi-antenna gaussian channels,”AT & T
Bell Laboratories, Tech. Rep., 1995.
[7] J. Heath, R.W., S. Sandhu, and A. Paulraj, “Antenna selection for
spatial multiplexing systems with linear receivers,”IEEE Commun.
Letters, vol. 5, no. 4, pp. 142–144, Apr. 2001.
[8] A. Barg and D. Nogin, “Bounds on packings of spheres in the
grassmann manifold,”IEEE Trans. Inf. Theory, vol. 48, no. 9, pp.
2450–2454, Sep. 2002.
[9] Y.-C. Chang, J.-Y. Wu, and T.-S. Lee, “Achievable throughput for
dual-mode limited-feedback transmit beamforming over temporally
correlated wireless channels,”in Vehicular Technology Conference
(VTC 2010-Spring), 2010 IEEE 71st, may 2010, pp. 1 –5.
[10] J. Choi and J. Heath, R.W., “Interpolation based transmit beamforming
for mimo-ofdm with limited feedback,”IEEE Trans. Signal Processing,
vol. 53, no. 11, pp. 4125–4135, Nov. 2005.
[11] G. S. Watson, Statistucs on Spheres. New York : Wiley, 1983.
[12] Y.-I. Chueh, “Feedback csi reduction method for limit feedback
precoding mimo-ofdm systems over temporally correlated channels,”
July 2011.