Complex wavelet packet based MIMO-OFDM wireless system
-
摘要: 为了在频率选择性信道中提供高速数据业务, 提出了一种新的多入多出-正交频分复用系统MIMO-OFDM(Multi-Input Multi-Output -Orthogonal Frequency Division Multiplexing).该系统使用复小波包变换CWPT(Complex Wavelet Packet Transform)来实现OFDM,而不是使用传统的快速傅立叶变换FFT(Fast Fourier Transform).由于复小波包函数具有很好的特性,通过对有2个用户的MIMO-OFDM系统进行仿真的结果表明,基于CWPT的MIMO-OFDM系统性能要比使用传统的FFT的MIMO-OFDM 系统好,但是复杂度略高.Abstract: To provide high speed data service in frequency selective fading channels, a new MIMO-OFDM(multi-input multi-output-orthogonal frequency division multiplexi ng) system was proposed. The system used CWPT(complex wavelet packet transform) instead of FFT(fast Fourier transform) to realize OFDM. For t he property of complex wavelet packet functions, simulation of a MIMO-OFDM syst e m with two users show that, the CWPT based MIMO-OFDM system is better than the F FT based MIMO-OFDM system, but the CWPT based MIMO-OFDM scheme has some additi onal complexity.
-
[1] Foschini G J, Gans M J. On limits of wireless communications in a fading environment when using multiple antennas [J]. Wireless Personal Communication, 1998, 6(3):311~335 [2]Suthaharan S, Nallanathan A. Space-time coded MIMO-OFDM for high cap acity and high data rate wireless communication over frequency selective fading channels . In:IEEE Communication Society, 4th International Workshop on Mobile and Wireless Communications Network . Sweden:IEEE, 2002.424~428 [3]Vahid Tarokh. Space-time block codes from orthogonal designs [J]. IEEE Trans on Information Theory, 1999, 45(5):1456~1467 [4]Sampath H, Talwar S. A fourth-generation MIMO-OFDM broadband wirele ss system:design, performance, and field trial results[J]. Communications Magazine, IEEE, 2002, 40(9):143~149 [5]Li Y G, Winters J H. MIMO-OFDM for wireless communications:signal detection with enhanced channel estimation[J]. IEEE Tans on Communications, 2002, 50(9):1471~1477 [6]Zhang Xiaodong, Bi Guangguo. OFDM scheme based on complex orthogonal wavelet packet . In:12th IEEE International Symposium on , 2001.99~104 [7]Siavash M, Alamouti. A simple transmit diversity technique for wireless communications[J]. IEEE select Areas Commun, 1998, 16(8):1451~1458 [8]Li Ye, Scshadri N. Channel estimation for OFDM system with transmit diversity in mobile wireless channels [J]. IEEE J Selet Areas comm, 1999, 17(3):461~471 -
点击查看大图
计量
- 文章访问数: 2998
- HTML全文浏览量: 230
- PDF下载量: 732
- 被引次数: 0
下载:
