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Performance Analysis of MIMO-OFDM Systems Concatenated with JSCC over Multi-Path Fading Channel
|關鍵字:||結合訊源編碼與通道編碼;JSCC;階層數區段分割壓縮碼;多輸入多輸出系統;正交分頻多工系統;SPIHT;MIMO;OFDM||出版社:||電機工程學系所||引用:|| J. M. Shapiro, “Embedded image coding using zerotrees of wavelet coefficients,”IEEE Trans. Signal Processing, vol. 41, no. 12, pp. 3445-3462, Dec. 1993.  A. Said and W. A. Pearlman, “ A new, fast, and efficient image code based on set partitioning in hierarchical trees,” IEEE Trans. Circuits and Systems for Video Technology, vol. 6, no. 3, pp. 243-250, June 1996.  A. A. Alatan, M. Zhao, and A. N. Akansu, “Unequal error protection of SPIHT encoded image bit streams,”IEEE Journal on Selected Areas in Communications,vol.18 no. 6, pp. 814-818, June 2000.  R. Chang, “Synthesis of band-limited orthogonal signals for multichannel data transmission,” BSTJ, vol. 46, pp. 1775-1796, December 1966.  G. J. Foschini and M.J. Gans, “On Limits of Wireless Communications in a Fading Environment when Using Multiple Antennas,” Wireless Personal Communications, vol. 6, pp. 311-335, Mar. 1998.  I. E. Telatar, “Capacity of multi-antenna Gaussian channels,” Eur. Trans. Telecommun., vol. 10, no. 6, pp. 585-595, Nov. 1999.  S. M. Alamouti, “A Simple Transmitter Diversity Scheme for Wireless Communi- cations,” IEEE J. Select. Areas Commun., vol. 16, pp. 1451-1458, Oct. 1998.  C. Berrou, A. Glavieux and P. Thitimajshima, “Near Shannon limit error-correcting coding and decoding: Turbo-codes.1,” IEEE International Conference on Commun., vol. 2, pp. 1064-1070, Mar. 1993.  R. G. Gallager, “Low density parity check codes,” IRE Trans. Inform. Theory, vol. 8, pp. 21-28, Jan. 1962.  R. M. Tanner, “A recursive approach to low complexity codes,” IEEE Trans. Inform. Theory, vol. 27, pp. 533-547, Sept. 1981.  T. H. Liew and L. Hanzo, “Space-time codes and concatenated channel codes for wireless communications,” Proc. IEEE, vol. 90, pp. 187-219, Feb. 2002.  H. FUTAKI and T. OHTSUKI, “space-time transmit diversity schemes with low-density parity-check (LDPC) codes,” IEICE Trans. Commun., vol. E86-B, no. 10, Oct. 2003.  G. Zhu, Y. He, G. Liu, B. Zhang, and F. Wang, “Concatenation of space-time block codes and turbo product codes over Rayleigh flat fading channels,” IEEE Vehicular Technology Conference, vol. 2, pp. 1186-1190, May. 2005.  Yinggang Du, and K. T. Chan, “Enhanced space-time block coded systems by concatenating turbo product codes,” IEEE Commun. Letters, vol. 8, pp. 388-390, June 2004.  S. Lin and D. J. Costello, Jr., Error Control Coding, 2nd ed. Upper Saddle River, NJ: Prentice Hall, 2004.  T. Richardson, A. Shokrollahi and R. Urbanke, “Design of capacity approaching irregular codes,” IEEE Trans. Inform. Theory, vol. 47, pp. 619-637, Feb. 2001.  T. J. Richardson and R. L. Urbanke, “Efficient encoding of low-density parity-check codes,” IEEE Trans. Inform. Theory, vol. 47, pp. 638-656, Feb. 2001.  IEEE Std 802.16e-2005, 2006. Standard for Local and metropolitan area networks Part 16: Air Interface for Fixed and Mobile Broadband Wireless Access Systems Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1, IEEE, New York, USA.  H. Zhong and T. Zhang, “Block-LDPC: A practical LDPC coding system design approach,” IEEE Tran. TCSI, vol. 52, pp. 766-775, Apr. 2005.  Kaveh Pahlavan & Allen H. Levesque, “Wireless Information Networks(second edition)”, A JOHN WILEY & SONS., INC., PUBLICATION, 2005  Matthias Pätzold, “Mobile Fading Channel” John Wiley & Sons, Ltd, 2002  K.F. Lee and D.B. Williams, “A space-frequency transmitter diversity technique For OFDM systems,” IEEE GLOBECOM., vol. 3, 27 Nov. - 1, pp.1473-1477 Dec. 2000.  Blum, R.S.,Ye Geoffrey Li, Winters, J.H.and Qing Yan“ Improved Space-Time Coding for MIMO-OFDM Wireless Communications”IEEE Trans. Inform. Theory, vol. 49, pp. 1873-1878, Feb. 2001.  A. van Zelst and T.C.W. Schenk, “Implementation of a MIMO OFDM-based wireless LAN system,” IEEE Trans. Signal Processing, vol. 52, no. 2, pp.483-494. Feb. 2004  K. Suto and T. Ohtsuki, “Performance evaluation of space-time- frequency block codes over frequency selective fading channels,” Vehicular Technology Conference,vol. 3, 24-28 Sept. 2002, pp. 1466-1470.  F. Tosato and P. Bisaglia, “Simplified soft-output demapper for binary interleaved COFDM with application to HIPERLAN/2,” IEEE International Conference on Commun., vol. 2, pp. 664- 668, Apr.-May 2002.||摘要:||
SPIHT的高壓縮率且具有漸進式傳輸的影像編碼架構，其編碼效率高、速度快且複雜度低，但是當位元訊息產生錯誤時，回覆的影像往往不得辨識，因此針對不等同重要性資料，使用不等同錯誤保護(Unequal Error Protection,UEP)的渦輪碼與低密度查核碼，將通道編碼的效率提升以節省多餘的查核位元，同時低頻係數的重要資料能有更好的錯誤保護。本篇論文模擬在802.11與COST207兩種標準下之多路徑衰減通道，針對此頻率選擇性衰減通道的效應，引用OFDM的技術將調變信號分成多個正交子載波在一個時間週期平行傳送。再引用多根天線傳輸相同的信號，經過數個獨立的通道由多根天線接收，以降低信號同時錯誤的機會，並且提升分集的增益(diversity gain)。並針對整體系統在不同多路徑環境觀察接收端還原影像之影像信號雜訊比(Peak signal-to-noise ratio)之優劣。
SPIHT has a high compression rate that could provide a progressive transmission over image-coded structure, it is also a high code-rate, fast encoded and low complexity code. But when the bit stream error occurs, the recovered image is unrecognized. Therefore, we have to use different Unequal Error Protected (UEP) Turbo code and LDPC code to raise the channel coding rate according to their different importance level in order to reduce to unnecessary parity check bits and meanwhile the important low frequency data factors can have a better protection. In this thesis, we simulate the transmission over IEEE 802.11 and COST207 two different standard multi-path fading channels. According to these fading channels, we will use OFDM technique to transform signals into multiple orthogonal subcarriers to be transmitted over multiple antenna transmission structure in the same time period. By applied Multiple Input Multiple Output (MIMO) technique in to the multi- antenna system, we could reduce the error probability of transmitting error in the same time, also raise the diversity gain of total transmission and observe the system peak signal-to-noise ratio performance of the recovering image at the receiver.
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