| 摘要(英) |
In this thesis, implementation of a MIMO-OFDM baseband receiver by TSMC 90nm process for indoor highthroughput wireless communication systems is presented. The receiver supports QPSK, 16QAM and 64-QAM constellation and spatial multiplexing up to four antennas. The system has three operation modes corresponding to different FFT sizes of 128, 256, and 512 points. At the receiver, three main functional blocks of synchronization, channel estimation and MIMO detection are integrated at the receiver. And 24 memories are used. For reducing hardware complexity, five memories are shared. We incorporate symbol timing detection and carrier frequency offset (CFO) acquisition modules in the time domain. The received signals first enter into the symbol timing detector and CFO estimator to acquire an adequate FFT window and an initial CFO estimate. After the signals are transformed to frequency domain by the FFT unit, the subsequent CFO and sampling clock offset (SCO) tracking mechanism is also designed in the frequency domain to compensate the residual CFO and SCO errors to prevent from their severe destruction of the system performance. The channel estimates are then derived from the long preamble and are subsequently processed by the one-time sorted QR decomposition unit. Thereafter, the pre-processed signals are sent to the K-best sphere decoder to retrieve the spatial multiplexed user data. Simulation results are provided to show the satisfying system performance. The design is implemented in TSMC 90nm CMOS technology. It has gate count of 1.034M and uses memories of 835 Kbits. Total consumption power is 335mW. From post-layout simulation results, the system can work at 160MHz sampling frequency, which is capable to offer 2.592 Gbps transmission rate.
|
| 參考文獻 |
[1] IEEE P802.11n/D2.00 Draft STANDARD for Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) Specifications : Enhancements for High Throughput
[2] R. C. Daniels and R. W. Heath, “60 GHz wireless communications: emerging requirements and design recommendations,” IEEE Vehicular Technology Magazine, vol.2, Issue.3, pp.41-50. Sep. 2007.
[3] H. Sawada, NICT, “IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)” doc. : IEEE 802. 15-06-0297-02-003c
[4] K. Sato, H. Sawada, Y. Shoji, S. Kato, NICT, “Channel Model For Millimeter Wave WPAN,” The 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC”07), Sep. 2007. pp.1-5.
[5] S. K. Yong, Samsung, “TG3c Channel Modeling Sub-committee Final Report,” IEEE 802.15-07-0584-01-003c
[6] H. Shousheng and M. Torkelson, “Designing pipeline FFT processor for OFDM
(de)modulation,” International Symposium on Signals, Systems, and Electronics, Oct. 1998. pp.257 – 262.
[7] P. Y. Tsai and T. D. Chiueh, “A Low-Power Multicarrier-CDMA Downlink Baseband Receiver
for Future Cellular Communication Systems”, IEEE Transactions on Circuits and Systems I: Reqular Papers, pp.2229-2239. Oct. 2007.
[8] Z. Y. Huang and P. Y. Tsai, “High-Throughput QR Decomposition for MIMO Detection in OFDM Systems,” IEEE International Symposium on Circuit and Systems, May 2010. pp.1492-1495.
[9] P. Y. Tsai, W. T. Chen, X. C. Lin, M. Y. Huang, “A 4x4 64-QAM reduced-complexity K-best MIMO detector up to 1.5Gbps,” IEEE International Symposium on Circuit and Systems, 2010. pp.3953-3956.
[10] S. Cook and D. Prasad, “Creating Artisan’s Recommended Memory BIST Hardware with MBISTArchitect,” Mentor Graphics Corporation, Nov. 2004.
[11] A. Burg, and et al., “A 4-Stream 802.11n Baseband Transceiver in 0.13 μm CMOS ,” IEEE Symposium on VLSI Circuits, Jun. 2009. pp. 282-283.
[12] P. Petrus, and et al., “An Integrated Draft 802.11n Compliant MIMO Baseband and MAC Processor,” IEEE Solid-State Circuits Conference, Feb. 2007. pp. 266-602
[13] Ze-Mu Chang, “Design and Evaluation of Gigabit Indoor Wireless Communication Systems,” National Central University master thesis, Jun. 2010.
[14] Zheng-Yu Huang, “High-Throughput QR Decomposition for MIMO Detection in OFDM Systems,” National Central University master thesis, Jun. 2010.
[15] Wen-Ji Jau, “Gigabit Wireless Communication Systems for Next-Generation Digital-Home Applications,” National Central University master thesis, Jun. 2011.
|
[Endnote RIS 格式]
[相關文章]
[文章引用]
[完整記錄]
[館藏目錄]
[檢視]
plurk
funp
live
udn
HD
myshare
netvibes
friend
youpush
delicious
baidu
Google bookmarks
del.icio.us
hemidemi
facebook
twitter
google
reddit