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Scrambling-Exact Channel Estimation in W-CDMA Systems

Authors:
Wolfgang U. Aichmann

Keywords: W-CDMA; HSDPA; MIMO; channel estimation; scrambling

Abstract:
Multiple–input Multiple–output (MIMO) antenna systems require one pilot signal for each transmitting antenna. As scrambling is a quasi–orthogonal operation a small portion of the pilot energy is scattered into other pilot signals even with ideal conditions apart from that small non–orthogonality. In this paper the correlation approach of estimating the channel impulse response is extended analytically such as to take into account the full spreading sequence, improving thereby significantly the performance of high–speed downlink packet access (HSDPA) MIMO systems especially for very high data rates when dual stream transmission is used in combination with cancellation of the interference between the data streams.

Pages: 12 to 17

Copyright: Copyright (c) IARIA, 2011

Publication date: June 19, 2011

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-140-3

Location: Luxembourg City, Luxembourg

Dates: from June 19, 2011 to June 24, 2011