跳到主要內容

臺灣博碩士論文加值系統

(18.97.14.86) 您好!臺灣時間:2025/02/09 02:18
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:張瑋哲
研究生(外文):Wei-Che Chang
論文名稱:應用於正交分頻多工技術為基礎之低複雜度接收端基頻框架同步器
論文名稱(外文):Study on Low Complexity Baseband Frame Synchronization for OFDM Applications
指導教授:李鎮宜
指導教授(外文):Chen-Yi Lee
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電子工程系所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2005
畢業學年度:93
語文別:英文
論文頁數:108
中文關鍵詞:時序同步正交分頻多工低複雜度框架同步器
外文關鍵詞:time synchronizationOFDMlow complexityframe synchronizer
相關次數:
  • 被引用被引用:0
  • 點閱點閱:163
  • 評分評分:
  • 下載下載:16
  • 收藏至我的研究室書目清單書目收藏:0
在無線通訊的系統中,高速傳輸以及低功率消耗一向是最為關切的兩個研究主題,尤其在近年來發展的超寬頻技術(UWB)中,在接受端的時域同步化需要超過500MHz的頻寬,應用於這樣的高速設計,必需使用平行化架構來作資料處理,同時造成功率消耗的線性成長,使得低功率消成為超寬頻技術發展中最大的挑戰。在本論文中,我們藉由改良的比對濾波器(matched-filter)與動態門檻(dynamic threshold)提出應用於正交多頻分工技術(OFDM)之超寬頻系統的低複雜度框架同步器。在這個設計中,我們使用可以降低比對濾波器複雜度和減少暫存器存取資料次數的演算法來達到低複雜度與低功率消耗的需求,並保持框架同步器的誤差在可接受的範圍之內。此外在平行架構下,不同於一般的設計用多套暫存器存取多重資料流的資料來和多重的比對濾波器作運算,我們基於暫存器共用的觀念,將比對濾波器的資料重新排列後,來讓多重的比對濾波器能夠同時分享一套暫存器的資料,以減少平行架構中所需要的暫存器數量。根據模擬的結果,在802.11a的系統平台,我們提出的設計在10% PER下所造成的誤差小於0.35dB的SNR;而在超寬頻技術的系統平台,我們提出的設計在8% PER下所造成的誤差則是小於0.45dB的SNR。而在硬體的實現上,我們使用.18μm製程,和一般使用平行架構達到528MSample/s的框架同步器相比,我們的設計不但能處理528MSample/s的資料,還可以節省58%的功率消耗和65%的硬體面積
In wireless communication, high data rates and low power consumption are the main concerns to improve the transmission speed and extend the IC working time. In recent years, ultra-wideband (UWB) has received much attention as a high speed, low power wireless portable device. It requires over 500MSamples/s throughput in time domain synchronization and can be achieved by parallel architecture, leading high power dissipation increasing in linear. Therefore, low power issue becomes the challenge of UWB baseband design. In this thesis, a low-complexity frame synchronizer combining improved matched-filter and dynamic-threshold design is proposed for OFDM-based UWB system. It provides a methodology to reduce matched-filter complexity and redundant access of register-files with an acceptable performance loss. Based on the register-sharing algorithm, single register-files shares received data for parallel matched-filters are developed to achieve 528MSample/s throughput for the 480Mb/s UWB design. Simulation results show the synchronization loss of the propose design can be limited to 0.35dB SNR for 10% PER in IEEE 802.11a WLAN system and 0.45dB SNR for 8% PER of LDPC-COFDM and MB-OFDM UWB systems. In hardware implementation, the proposed design can save 58% power consumption and 65% area cost from the conventional design in 0.18μm CMOS process.
[1] Salzberg, B.R, “Performance of an efficient parallel data transmission system,” IEEE Trans. Comm., Vol. COM-15, pp.805-813, Dec. 1967.
[2] Rechard Van Nee, and Ramjee Prasad, “OFDM for Wireless Multimedia Communications”, pp.20-51, 2000.
[3] Chun-Chi Chen, “A SUCCESSIVE TIMING SYNCHRONIZATION METHOD FOR OFDM-BASED WIRELESS LOCAL AREA NETWORK,” M.S. thesis, National Chiao Tung University, Summer 2003.
[4] Wei-Che Chang, Lin-Hung Chen, Wan-Chun Liao, Hsuan-Yu Liu, and Chen-Yi Lee, “An Area and Power Efficient Frame Synchronizer for 480Mb/s OFDM-based UWB System” VLSI-TSA-DAT, April 2005
[5] IEEE 802.11, IEEE Standard for Wireless LAN Medium Access Control and Physical Layer Specifications, Nov. 1999.
[6] ESTI TS 101 475 “Broadband radio access network (BRAN); Hiperlan type 2; Physical layer,” April 2001.
[7] A. Batra, J. Balakrishnan, G.R. Aiello, J. R. Foerster, A. Dabak, “Design of A Multiband OFDM System for Realistic UWB Channel Environments,” IEEE Transactions on Microwave Theory andTechniques,pp.2123-2138, Sept. 2004.
[8] Hsuan-Yu Liu, Chien-Ching Lin, Yu-Wei Lin Ching-Che Chang, Kai-Li Lin, Wei-Che Chang, Lin-Hong Chen, Hsie-Chia Chang, and Chen-Yi Lee, “A 480Mb/s KDPC-COFDM-based UWB Baseband Transceiver in 0.18um CMOS Process,” ISSCC, Feb 2005
[9] Marian Verhelst, Wim Vereecken, Michiel Steyaert, and Wim Dehaene, “Architecture for Low Ultra-Wideband Radio Receivers in The 3.1-5GHz Band for Data Rates <10Mbps, ”International Symposium on Low Power Electronics And Design, August 2004.
[10] D. O’Donnell, S. W. Chen, B. T. Wang, and R. W. Brodersen “An Integrated, Low Power, Ultra-Wideband Transceiver Architecture for Low-Rate Indoor Wireless System,” IEEE CAS
Workshop on Wireless Communications and Networking, Sep. 2002.
[11] Chia-Hsiang Yang, Yu-Hsuan Lin, Shih-Chun Lin, Tzi-Dar Chiueh, “Design of a low-complexity receiver for impulse-radio ultra-wideband communication systems,” Circuits and Systems, 2004(ISCAS '04), Proceedings of the 2004 International Symposium on Volume 4, 23-26 Page(s):IV - 125-8 Vol.4, May 2004
[12] Keller, T., Piazzo, L., Mandarini, P., Hanzo, L., “Orthogonal frequency division multiplex synchronization techniques for frequency-selective fading channels,” Selected Areas in Communications, IEEE Journal on Volume 19, Issue 6, Page(s):999 – 1008, June 2001
[13] L. Schwoerer, “VLSI Suitable Synchronization Algorithms and Architecture for IEEE 802.11a Physical Layer,” IEEE International Symposium on Circuits and Systems, vol. 5, pp. 721-724, May 2002.
[14] ESTI EN 300 401 “Radio broadcasting systems; digital audio broadcasting (DAB) to mobile; portable and fixed receivers,” May 2001.
[15] ESTI EN 300 744 “Digital vedio broadcasting (DVB); framing structure, channel coding and modulation for signal digital terrestrial television,” Jan. 2001.
[16] Weinstein, S.B. and P.M. Ebert, “Data Transmission by Frequency Division Multiplexing Using the Discrete Fourier Transform,” IEEE Trans. Comm., Vol. COM-19, pp.628-634, Oct. 1971.
[17] Win, M.Z., Scholtz, R.A.,”Impulse radio: how it works,” Communications Letters, IEEE Volume 2, Issue 2, Page(s):36 – 38, Feb. 1998
[18] Chia-Hsiang Yang, Yu-Hsuan Lin, Shih-Chun Lin, Tzi-Dar Chiueh, “Design of a low-complexity receiver for impulse-radio ultra-wideband communication systems,” Circuits and Systems, 2004(ISCAS '04), Proceedings of the 2004 International Symposium on Volume 4, 23-26 Page(s):IV - 125-8 Vol.4, May 2004
[19] A. Batra et al., ”Multi-band OFDM Physical Layer Proposal,” Submitted to IEEE 802.15
TG3a,Sep. 2003.
[20] Bob O’Hara, Al Petrick, “The IEEE 802.11 Handbook”, New York. IEEE press, 1999.
[21] J. Foerster and Q. Li, “UWB Channel Modeling Contribution from Intel,” IEEE P802.15-
02/279-SG3a,June 2002.
[22] J. Foerster, Ed., “Channel Modeling sub-committee report final ,”,IEEE802.1f-02/490
[23] P. H. Moose, “A Technique for OFDM frequency offset correction”, IEEE TRANS. COMMUN, vol.42, Oct. 1994, pp2908-2914.
[24] T. M. Schmidl, D. C. Cox, “Robust Frequency and Timing Synchronization for OFDM,” IEEE Transactions on Communication, vol. 45, no. 12, Dec. 1997.
[25] Kabulepa, L.D., Garcia Ortiz, A., Glesner, M., “Power reduction techniques for an OFDM burst synchronization core,”; Circuits and Systems, 2002. (ISCAS 2002), IEEE International Symposium on Volume 1, 26-29, Page(s):I-265 - I-268 vol.1, May 2002
[26] Krstic, M., Troya, A., Maharatna, K., Grass, E., “Optimized low-power synchronizer design for the IEEE 802.11a standard,” Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03), IEEE International Conference on Volume 2, 6-10 Page(s):II - 333-6 vol.2, April 2003
[27] Pollet, T., Van Bladel, M., Moeneclaey, M, “BER sensitivity of OFDM systems to time synchronization error,” Time Synchronization Error”, Communications, IEEE Transactions on , Volume: 43 Issue: 2 Page(s): 191 -193, Feb/Mar/Apr 1995
[28] Krstic, M., Troya, A., Maharatna, K., Grass, E., “Optimized low-power synchronizer design for the IEEE 802.11a standard,” Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03), IEEE International Conference on Volume 2, 6-10 Page(s):II - 333-6 vol.2, April 2003
[29] Taehyeun Ha, Seongjoo Lee, Jaseok Jim, “Low-complexity correlation system for timing synchronization in IEEE802.11a wirelessLANs,”, Radio and Wireless Conference, 2003, RAWCON '03. Proceedings 10-13 Page(s):51 – 54, Aug. 2003
[30] Lin-Hung Chen, Wei-Che Chang, Hsuan-Yu Liu, and Chen-Yi Lee, “A 528MS/s Frequency Synchronizer for OFDM-based UWB System” VLSI-TSA-DAT, April 2005
[31] Fort, A., Weijers, J.-W., Derudder, V., Eberle, W., Bourdoux, A., “A performance and complexity comparison of auto-correlation and cross-correlation for OFDM burst synchronization,” Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03) IEEE International Conference on Volume 2, 6-10, Page(s):II - 341-4 vol.2, April 2003
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
無相關期刊