|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
Investigation of STBC and TSTD Transmitter Diversity Effect Using Chase Combining in Spread OFDM Broadband Packet Wireless Access
Kwan Woong RYU Yoshihisa KISHIYAMA Yong Wan PARK
Publication
IEICE TRANSACTIONS on Communications
Vol.E89-B
No.5
pp.1700-1704 Publication Date: 2006/05/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.5.1700 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: spread OFDM, STBC, TSTD, chase combining,
Full Text: PDF(830.9KB)>>
Summary:
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 0.5 dB 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 0.3 µsec and the maximum Doppler frequency of 20 Hz.
|
|
|