DIGITAL FILTER FOR DIRECT SPECTRUM SPREAD

摘要

PROBLEM TO BE SOLVED: To provide a digital filter for direct spectrum spread capable of suppressing power consumption by further reducing a memory capacity without adding a complicated circuit. SOLUTION: This digital filter used for spread spectrum communication for spreading transmission source signals by a prescribed code and performing communication is provided with a memory cell 18 for storing the data of transmission signals spreaded and band-limited corresponding to the transmission source signals and data read parts 12, 14 and 16 for reading and outputting corresponding data from the memory cell based on the inputted transmission source signals. A shift register 12 selects a group of the data inside the memory cell 18 and successively reads the data through a counter 14.