A radio communications device 100 including a processor 120 having a digital signal processor (DSP) coupled to a transceiver 110. The transceiver includes a digital-to-phase synthesizer having one or more independently variable frequency or phase signal outputs coupled to a transmitter and/or to a receiver. The variable frequency and phase outputs of the digital-to phase synthesizer are mixed with corresponding received signals and are capable of frequency or phase modulating information signals for transmission. Amplitude modulated signals may be provided through polar modulation by combining synthesizer outputs at a summer.
申请公布号
WO2004012343(A2)
申请公布日期
2004.02.05
申请号
WO2003US23007
申请日期
2003.07.22
申请人
MOTOROLA, INC., A CORPORATION OF THE STATE OF DELAWARE
发明人
ALBERTH, WILLIAM, JR.,;KLOMSDORF, ARMIN;STENGEL, ROBERT