Digital-to-phase synthesizer for multi-mode radio transceiver
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Solution Overview
Problem
Current radio communications technologies face limitations in adaptive and multi-mode radio transceiver architectures, particularly in wireless communications devices, where existing solutions struggle to efficiently manage frequency and phase modulation across multiple outputs and diverse communication scenarios.
Innovation Solution
The implementation of a digital-to-phase synthesizer with a phase-locked loop (PLL) voltage-controlled oscillator, a delay line with tunable taps, and a digital phase processor that selects and combines phase-shifted signals to produce outputs with independent frequency and phase parameters, enabling flexible modulation and modulation of the reference input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a digital-to-phase synthesizer with PLL and delay line is implemented to enable independent frequency and phase control across multiple outputs, then adaptability and modulation capability are improved, but device complexity increases
Solution Approach 1:
The digital-to-phase synthesizer is designed as a universal multi-functional device that can perform multiple modulation types (phase, amplitude, frequency) and support various communication modes (multi-mode and MIMO applications) through a single integrated architecture with PLL, delay line, and digital phase processor components
Solution Approach 2:
The synthesizer architecture is segmented into distinct functional blocks including the phase-locked loop, voltage-controlled oscillator, delay line with tunable taps, and digital phase processor. This segmentation allows independent optimization of each component while maintaining overall system adaptability for different modulation schemes
2Adaptability or versatility
If multiple outputs with independent frequency and phase parameters are generated through digital phase processing, then modulation capability is improved, but device complexity increases
Solution Approach 1:
The system employs dynamic control mechanisms where the digital phase processor can real-time adjust phase shifts and the delay line can dynamically tune tap positions. This dynamic adaptability enables the device to switch between different modulation schemes and communication modes without hardware reconfiguration
Solution Approach 2:
The digital phase processor acts as an intermediary component that receives digital control signals and converts them into precise phase adjustments for multiple outputs. This intermediary layer simplifies the control architecture by providing a unified digital interface for managing complex multi-output phase and frequency parameters
Data Source
AI summary
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.