Rake-finger for CDMA mobile radio receiver stage can be implemented with reduced hardware costs

摘要

The rake-finger has a delay element (3) for imposing a delay on a reception signal, a first multiplier (5) connected after the delay element for multiplying with a spreading code and a scrambling code and a second multiplier (7') for multiplying the delayed, unspread reception signal with a weighting factor characterising the path strength. An adder with an associated result register is implemented in the second multiplier to sum the delayed, unspread and weighted reception signal over the length of the spreading code to compute a symbol.