Channel estimation and linear precoding for CDMA with space-time transmit diversity.
Published: 2004
Language: eng
Number of pages: 73
Description: Space-time block coding (STBC) is a well-known way to create transmit diversity in wireless communications. Space-time transmit diversity (STTD) is an extension of STBC to code division multiple access (CDMA) systems. To date, most discussions of STTD have assumed flat fading or ignored multi-access and inter-symbol interference (MAI and ISI) induced by frequency selective fading. This thesis demonstrates that MAI and ISI can cause an unacceptable breakdown in STTD performance with conventional interference-limited channel estimation methods. Therefore, two improved channel estimation methods are proposed for STTD in frequency selective fading. This thesis also studies the performance degradation of STTD due to spatially correlated frequency selective fading and develops a linear precoding scheme for STTD based on channel correlation knowledge. The simulation results show that the performance of STTD is significantly improved using the proposed channel estimation methods and the linear precoding scheme.
Notes: Adviser:  Ten Joon Lim.

Thesis (M.A.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 43-03, page: 0950.

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