Dual-Path Radio Receiver for Switched-Modulation Data Bursts
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Solution Overview
Problem
Conventional radio receivers designed to receive data bursts with switched modulation types consume more power due to their linear design, which is more complex than receivers for constant envelope modulation methods like GFSK.
Innovation Solution
A radio receiver with two separate reception paths, one for constant envelope modulation (e.g., GFSK) and another for linear modulation (e.g., DQPSK or QAM), allowing for reduced power consumption by deactivating the second path when only GFSK modulation is used, and sharing components to minimize complexity and area usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a linear receiver is used to receive data bursts with switched modulation types, then the receiver can handle both GFSK and linear modulation methods, but the power consumption increases due to the higher complexity of the linear receiver
Solution Approach 1:
The receiver is divided into two separate reception paths: a first reception path for constant envelope modulation methods (GFSK) and a second reception path for linear modulation methods (DQPSK, QAM). This segmentation allows the system to process different modulation types independently, enabling the low-power GFSK path to handle GFSK signals without requiring the more complex linear receiver path to be active, thus reducing overall power consumption while maintaining versatility
Solution Approach 2:
The system dynamically switches between using the first reception path and the second reception path based on the detected modulation type. The receiver can adaptively activate only the necessary path for the current transmission, making the system's operational characteristics changeable rather than fixed, which resolves the contradiction between handling multiple modulation types and minimizing power consumption
2Adaptability or versatility
If a linear receiver is used to receive data bursts with switched modulation types, then the receiver can process linear modulation methods, but the device complexity increases compared to a pure GFSK receiver
Solution Approach 1:
The receiver architecture is segmented into two independent processing paths with specialized designs for their respective modulation types. The first path is optimized for GFSK with simpler circuitry, while the second path handles linear modulations. This segmentation prevents the need for a single overly complex linear receiver that must handle all modulation types, thereby reducing overall device complexity while maintaining adaptability
Solution Approach 2:
Both reception paths share common front-end components and control logic, allowing the system to achieve multi-functionality without proportionally increasing complexity. The shared components perform universal functions for both modulation types, while only the necessary specialized path is activated for each transmission type, resolving the contradiction between versatility and complexity
Data Source
AI summary
The invention relates to a radio receiver for the reception of a data burst which is transmitted by a transmitter, in which case the data burst includes a first section which has been modulated using a first modulation method at the transmitter end, and a second section which is transmitted after the first section and has been modulated using a second modulation method at the transmitter end. The radio receiver has a first reception path for processing of the first section and a second reception path for processing of the second section.