Communication system spread spectrum direct sequence (dss) with frequency modulation used for spectrum spread.

摘要

COMPLEXITY OF HARDWARE EQUIPMENT transmit and receive transmission system RADIO CELL CDMA (ACCESS code division multiple) is reduced by using techniques Frequency Modulated FM TO GET A spectral amplitude in combination with modulation SIGNAL. TECHNIQUE AMPLITUDE SPECTRUM COMMUNICATIONS SYSTEM CDMA CELLULAR TELEPHONE RADIO generalizes EXTENDING THE RANGE OF VALUES ASSIGNED A wave amplitude SIGNAL CODE FOR INCLUSION OF MAGNITUDE UNITARIA complex numbers. THIS ALLOWS INCORPORATION (EN 307) A VERSION OF BANDA BASE (A 301) SIGNAL INFORMATION AND EXTENT OF WAVEFORMS (from 303, 305) INSTEAD OF CONVENTIONAL MULTIPLICATION OF TWO SIGNALS IN DSSS COMMUNICATION SYSTEMS (amplitude spectrum STREAM DIRECT) EXISTING. The resulting signal is used for controlling voltage-controlled oscillator (309) to (A 312) a transmission signal amplitude spectrum frequency modulation. This arrangement allows more efficient implementations EQUIPMENT transmission and reception.