| 摘要(英) |
In the thesis, we propose an integrated architecture of wideband, time division duplex (TDD), multiple input-smart antenna output (MIS*O), and multitone-code division multiple access (MT-CDMA) transceiver, which is advantageous characteristics of frequency, time, spatial domain. We consider multiuser and multiple access interference (MAI) scenarios in downlink communication and combat MAI of other users by generalized sidelobe canceller (GSC) and minimum variance distortionless response (MVDR) beamforming techniques. Firstly, in our proposed system architecture, transmission signals are generated simultaneously in frequency and spatial domains to reach high speed downlink capability through parallel data transmission. Secondly, due to the availability of channel gains by means of uplink receiving in a TDD system, it is therefore applied in the downlink transmission signals to proceed spatial-frequency channel preprocessing. Hereafter, in order to increase system capacity and speed, we take advantage of multiple spread spectrum code generators, and transmit multiple channel preprocessed signals simultaneously. Then, the goal of wideband, multi-carrier, parallel transmission of high speed of data is reached by means of inverse fast Fourier transform and guard band intervals. Finally, the diversity gain in spatial domain is obtained in subscriber through simultaneous multi-antenna transmission signals. After through the transmission processing as aforementioned, in the subscriber side, we can also utilize a smart antenna with many antenna elements spaced within half wavelength, different from conventional single antenna, to receive transmitting signals from base station to enhance anti-jamming capability in specific directions. |
| 參考文獻 |
[1] Riaz Esmailzadeh, Masao Nakagawa, “TDD-CDMA for Wireless Communications”, Artech House, 2003
[2] Shinsuke Hara, Ramjee Prasad, “Overview of Multicarrier CDMA”, IEEE Commun. Magazine, vol. 35, issue 12, pp. 126-133, Dec. 1997
[3] Juha Heiskala, John Terry, “OFDM Wireless LANs : a theoretical and practical guide”, Sams, c2002
[4] Jack H. Winter, “Smart Antennas for Wireless Systems”, IEEE Personal Commun. vol. 5, issue 1, pp. 23-27, Feb. 1998
[5] Theodore S. Rappaport, “Wireless Communications : principle and practice”, Prentice-Hall, 2002
[6] Riaz Esmailzadeh, “Prerake Diversity Combining in Time-Division Duplex CDMA Mobile Communication”, IEEE Transactions on Vehicular Technology, vol. 48, issue 3, pp. 795-801, May 1999
[7] David Tse, Pramod Viswanath, “Fundamentals of Wireless Communication”, Cambridge University Press, 2005
[8] Simon Haykin, “Adaptive Filter Theory”, Prentice Hall, 2002
[9] Siavash M. Almouti, “A Simple Transmit Diversity Technique for Wireless Communication”, IEEE Journal on Select Areas in Communications, vol. 16, issue 8,pp. 1451-1458, Oct. 1998
[10] B. R. Vojcic,Won Mee Jang, “Transmitter Precoding in Synchronous Multiuser Communications”,IEEE Transactions on Communications, vol. 46, issue. 10, pp. 1346-1355, Oct. 1998
[11] Barry D. Van Vee, Kevin M. Buckley, “Beamforming: A Versatile Approach to Spatial Filtering”,IEEE ASSP Magazine vol. 5, issue 2, pp. 4-24, Apr. 1988
[12] Zhongding Lei and Francois P.S. Chin , “Post and Pre-FFT Beamforming in an OFDM System”, Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th, vol 1, pp. 39-43, 2004 |
[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