Investigation of STBC and TSTD Transmitter Diversity Effect Using Chase Combining in Spread OFDM Broadband Packet Wireless Access(Wireless Communication Technologies)

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概要

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• This letter investigates the effects of the Space-Time Block Code (STBC) transmitter diversity and Time Switched Transmitter Diversity (TSTD) schemes while simultaneously considering the time diversity effect derived from Chase combining and the frequency diversity effect for downlink Spread OFDM packet wireless access in a broadband multipath fading channel. The simulation results show that when pilot channel based channel estimation is performed, TSTD improves the required average received signal energy per symbol-to-noise power spectrum density ratio by approximately 1.0 and 0.5dB compared to one-branch transmission, without and with antenna diversity reception, respectively, while the benefit of STBC is small due to channel estimation error, when the maximum number of retransmissions in Chase combining is three in a 12-path Rayleigh fading channel with the root mean squared delay spread of 0.3μsec and the maximum Doppler frequency of 20Hz.

• 2006-05-01

著者

• Park Yong

  Department of Genetic Engineering, Kyungpook National University

• Park Yong

  Department Of Applied Biological Chemistry Faculty Of Agriculture Shizuoka University

• KISHIYAMA Yoshihisa

  IP Radio Network Development Department, NTT DoCoMo, Inc.

• Ryu Kwan

  Department of Information and Communication Engineering, Yeungnam University

• Kishiyama Yoshihisa

  Ip Radio Network Development Department Ntt Docomo Inc.

• Ryu Kwan

  Department Of Information And Communication Engineering Yeungnam University

• Park Yong

  Department of Advanced Materials, Engineering for Information and Electronics, Kyung Hee University, Yongin 446-701, Korea

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