Dual-Path Transceiver Reception With Adaptive Signal Combining
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Solution Overview
Problem
Modern mobile communication devices require a high number of external components to handle multiple mobile communication standards, leading to increased space and production costs, and a need for miniaturization and integration of circuits.
Innovation Solution
A transceiver arrangement with a controllable coupling device and control circuit that selects between two receive amplifiers based on signal parameters, allowing for diversity reception and reducing the number of external components by eliminating the need for additional filters and optimizing amplifiers for different applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple receive amplifiers are used to support different mobile communication standards, then the adaptability and signal quality are improved, but the device complexity and number of external components increase
Solution Approach 1:
The patent implements a universal receive amplifier design where a first receive amplifier can process signals from multiple mobile communication standards (WCDMA, GSM, EDGE) by using a single low-pass filter with a cutoff frequency that accommodates all standards. This multi-functional approach eliminates the need for separate receive amplifiers and filters for each standard, reducing device complexity while maintaining adaptability across different communication protocols
Solution Approach 2:
The patent merges the functionality of multiple receive amplifiers into a single receive amplifier that can handle signals from different mobile communication standards. By combining the signal processing paths and using a common low-pass filter, the invention reduces the number of external components while maintaining the ability to support multiple standards through intelligent signal routing and processing
2Reliability
If narrow-band filters are added to suppress interference signal components, then the signal quality and useful-signal/noise proportion are improved, but the device complexity and production costs increase
Solution Approach 1:
The patent extracts and eliminates the need for additional narrow-band filters by using a single low-pass filter with an optimized cutoff frequency. The invention takes out the redundant filtering components that would otherwise be needed for each mobile communication standard, reducing device complexity while maintaining interference suppression through the unified filter design that works across all standards
Solution Approach 2:
The low-pass filter is designed with universal applicability across multiple mobile communication standards. By setting the cutoff frequency to accommodate the highest frequency component among WCDMA, GSM, and EDGE standards, the single filter performs the interference suppression function for all standards simultaneously, eliminating the need for multiple standard-specific filters and reducing overall device complexity
3Volume of moving object
If the number of external components is reduced for miniaturization, then the device size and production costs are improved, but the signal processing capability and interference suppression may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the cutoff frequency of the low-pass filter to maintain signal processing capability across multiple mobile communication standards. By carefully selecting the cutoff frequency parameter to accommodate the highest frequency component (WCDMA at 5.6 MHz), the invention ensures that reducing the number of filters does not compromise signal processing capability or interference suppression effectiveness
Solution Approach 2:
The patent implements feedback mechanisms through the control circuit that monitors signal characteristics and adjusts the receive amplifier operation accordingly. The control circuit determines whether to use the first or second receive amplifier based on the detected mobile communication standard, ensuring that signal processing capability is maintained even with reduced external components through intelligent adaptive control
Data Source
AI summary
A transceiver arrangement includes a first receive path including a first connection and a first receive amplifier, and a second receive path including a second connection, a second receive amplifier, and a frequency conversion device. The transceiver also includes a controllable coupling device configured to couple an output of the first receive amplifier to an input of the frequency conversion device on the second signal path, and a control circuit configured to provide a control signal to the coupling device for selectively combining signals delivered by the first and second receive amplifiers in the correct phase based on a parameter which is derived from a signal present at the first connection or second connection, or both. The parameter derived from the received signal represents whether a signal strength of the received signal or a signal quality of the received signal exceeds a first predetermined threshold.