United States Patent 7,693,113
Timmerman , et al. April 6, 2010
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CDMA system transmission matrix coefficient calculation
Abstract
A hermetian of a system response matrix is to be determined. Spreading codes, channel specific multipliers and channel impulse responses are provided. The channel code specific multipliers have real and imaginary values. Channel codes being a combination of a real spreading code, a complex scrambling code and a sign of the channel code specific multiplier. Real and imaginary components of an approximate hermetian of the system response matrix are determined. The channel code specific multipliers are applied to the real and imaginary components of a result of the convolutions to derive the hermetian of the system response matrix.
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Inventors: Timmerman; Chayil S. (Harleysville, PA), Buchert; Ryan Samuel (Breinigsville, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/784,747
Filed: April 9, 2007
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
10264192 Oct., 2002 7203181
60392202 Jun., 2002
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Current U.S. Class: 370/335 ; 370/342; 375/130
Current International Class: H04B 7/216 (20060101)
