Apparatus and method for controlling dynamic range of weight...

Details Apparatus and method for controlling dynamic range of weight... Apparatus and method for controlling dynamic range of weight...

2007-01-26

2010-06-29

Wang, Ted M (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S150000, C375S152000, C375S316000, C375S347000

Reexamination Certificate

active

07746942

ABSTRACT:
Provided is an apparatus and method for controlling a dynamic range of weight vectors according to a combining method to fit an input range of a channel decoder in a mobile station of a high rate packet data system. The apparatus includes a channel estimator for receiving pilot symbol from a base station and calculating channel estimation values of receive paths of each antenna, an autocorrelation matrix calculator for calculating autocorrelation matrix values in every chip duration from the received pilot symbols, a weight vector calculator for calculating weight vectors using the channel estimation values and/or autocorrelation matrix values according to a combining method of the multi-path received signals, a controller for outputting modified weight vectors by fitting an input range of a channel decoder according to the combining method, and a combiner for outputting the combined signal by multiplying descrambled received signals by the modified weight vectors. Accordingly, even if various combining methods are used when data is received in a mobile station of a high rate packet data system using the CDMA scheme, performance degradation of a channel decoder can be minimized.

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