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Performance analysis of a multi-code CDM transmission scheme based on cyclic extended spread code as a extension of 3rd generation CDMA system

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4 Author(s)
N. Oda ; Fac. of Sci. & Technol., Keio Univ., Yokohama, Japan ; H. Harada ; I. Sasase ; Y. Hase

This paper proposes an adaptive multi-code CDM transmission scheme for the multipath fading environment to achieve high code utilization efficiency. In the proposed system, we apply a new parallel transmission scheme using cyclic codes generated from a modified M-sequence which inserts the guard chips before and after an M-sequence. Moreover with radio channel estimation results obtained from the downlink by this multi-code CDM transmission scheme, the number of guard chips is varied adaptively on the uplink. In a micro cellular system, the performances of the proposed system are evaluated by computer simulation. As a result, it is essential for high quality broadband mobile communications to apply adaptive transmission to the new multi-code CDM transmission system

Published in:

Personal Wireless Communications, 1997 IEEE International Conference on

Date of Conference:

17-19 Dec 1997