A spread spectrum signal is processed after it is sampled at a selected sampling rate and tuned to a center frequency lower than the sampling rate and greater than zero. The signal is multiplied against a reference signal (133) to produce a corresponding product output (135), and an accumulation output (137) is formed by combining the product output (135) with a phase-shifted version of the accumulation output (141).
申请公布号
WO9859444(A1)
申请公布日期
1998.12.30
申请号
WO1998US12786
申请日期
1998.06.19
申请人
CELLNET DATA SYSTEMS, INC.
发明人
RAMBERG, ERIK, A.;FROELICH, ROBERT, K.;FULTON, FOREST, F.