Multi-phase pulse modulation polar transmitter and method of generating a pulse modulated envelope signal carrying modulated rf signal
AssigneeNational Taiwan University
InventorsJau-Horng Chen, Yi- Jan Emery Chen
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Abstract
A multi-phase pulse-modulated polar transmitter and a method of generating a pulse-modulated envelope signal carrying modulated RF signal. Multi-phase pulse modulation technique or similar multi-phase pulse modulation techniques are employed in conjunction with a plurality of power amplifiers to enhance the bandwidth of the transmitter and to reduce out-of-band emissions and noises while easily synchronizing the phase and envelope of the input signal.
Claims9
A multi-phase pulse-modulated polar transmitter, comprising:
- an envelope signal input end for receiving envelope signals;
- a plurality of constant-envelope radio-frequency (RF) signal input ends, each being for receiving input constant-envelope RF signals;
- a multi-phase pulse modulation module for receiving the envelope signals from the envelope signal input ends, so as to generate multi-phase (or multi-bit) pulse modulation signals according to the envelope signals;
- a plurality of signal modulation modules, each being for receiving one of the constant-envelope RF signals and modulating the received one of the constant-envelope RF signals according to one of the multi-phase (or multi-bit) pulse modulation signals, to thereby generate pulse-modulated RF signals that an envelope of each of the pulse-modulated RF signals carries phase information;
- and
- a plurality of power amplification modules, each being for receiving the pulse-modulated RF signals, amplifying power of each of the pulse-modulated RF signals and outputting the amplified pulse-modulated RF signals.
A method of generating pulse-modulated envelope signals carrying modulated RF signal, comprising:
- receiving pulse modulation control signals and modulated constant-envelope RF input signals by using a signal modulation module;
- and
- modulating the constant-envelope RF input signals according to the pulse modulation control signals by using the signal modulation module, so as to generate pulse envelopes carrying modulated RF signals.
A method of generating a pulse-modulated envelope signal carrying modulated RF signal, comprising:
- combining a plurality of low density pulse envelopes carrying modulated RF signals into a high density pulse envelope carrying modulated RF signal.
Dependencies are inferred from the claim text.