基於多重輸入/輸出及低密度同位檢查碼的短距通訊系統之性能分析

Performance analysis for MIMO LDPC-based DSRC systems

楊燕飛(Yan-Fei Yang)

指導教授 ： 李世凱

元智大學/電機通訊學院/通訊工程學系/碩士(2008年)

https://doi.org/10.6838/YZU.2008.00254

摘要

在移動下的通訊環境中，正確估測時變通道資訊，往往影響接收機性能的好壞。首先，探討LDPC code與多天線環境下的性能分析；第二，本文提出一種 Turbo Receiver的架構，搭配EM演算法和低密度同位檢查碼，經由不斷地循環解碼與通道資訊更新，來將性能大幅提升。

關鍵字

多天線 ； 多重輸入/輸出/低密度 ； 短距通訊

並列摘要

In the mobile wireless communication environment, whether we could estimate the time varying channel information or not often influence the performance of the receiver. First, the LDPC code and MIMO are considered for DSRC environment. Second, we proposed a turbo receiver structure which iteratively estimates the channel variation and decoding by using EM and SPA. The performance can be much improved in mobile environment.

並列關鍵字

MIMO ； LDPC ； DSRC

參考文獻

[3] F. Frescura, S. Pielmeier, G. Reali, G. Baruffa and S.Cacopardi,“DSP based OFDM demodulator and equalizer for professional DVB-T receivers,” IEEE Trans. on Broadcasting, Vol. 45, pp. 323-332, Sept. 1999.

[5] S. B. Weinstein and P. M. Ebert, “Data Transmission by Frequency-Division Multiplexing using the Discrete Fourier Transform,” IEEE Trans. on Communications, vol. 19, no. 5, pp. 628–634, Oct. 1971.

[7] J. I. Smith, “A computer generated multipath fading simulation for mobile radio,” IEEE Trans. Veh. Technol,vol.24,pp.39-40.

[8]David J. Young, “The generation of correlated rayleigh random variates by inverse discrete fourier transform,” IEEE transactions on communications, vol.48 no.7,July 2000.

[8] R. Negi and J. Cioffi, “Pilot tone selection for channel estimation in a mobile OFDM system”, IEEE Trans. Consumer Electron., vol. 44, pp. 1122–1128, Aug. 1998.