Carrier Aggregation Receiver Layout for Stable Noise and Gain
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Solution Overview
Problem
Existing wireless terminals face challenges in efficiently processing signals with carrier aggregation, particularly in maintaining noise feature and gain adjustments across different frequency bands, leading to reduced transmission speeds and increased power consumption.
Innovation Solution
A wireless terminal design that includes multiple receivers with amplification units capable of impedance matching and intra-band carrier aggregation, allowing for stable operation across non-CA, inter-band CA, and intra-band CA modes, with transistors configured to maintain consistent input impedance and enhance noise features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation function is applied to transmit or receive large amount of data, then data transmission capacity is improved, but noise feature degradation and gain feature degradation occur
Solution Approach 1:
The receiver is divided into multiple independent receiver chains (first receiver, second receiver, etc.), each handling specific frequency bands separately. This segmentation allows independent optimization of each chain's noise and gain characteristics while collectively achieving high data transmission capacity through carrier aggregation.
Solution Approach 2:
Each receiver chain is equipped with dedicated impedance matching units and amplification units tailored to its specific frequency band requirements. This local quality approach ensures optimal noise and gain performance for each band while maintaining overall system productivity through multi-carrier aggregation.
2Measurement precision
If gain of independent receiver is adjusted for intra-band CA mode, then signal processing accuracy is improved, but device complexity increases
Solution Approach 1:
The first receiver is designed with multi-functionality to handle both inter-band CA mode and intra-band CA mode. By configuring the first receiver to process multiple frequency bands (e.g., first frequency band and second frequency band) and providing outputs to both first and second output units, the system achieves accurate signal processing across different modes without requiring completely separate receiver chains for each mode.
3Productivity
If multiple receivers are used for carrier aggregation, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The receiver configuration is made dynamic and adaptable to different operating modes. In inter-band CA mode, the first receiver processes signals from multiple frequency bands. In intra-band CA mode, the first receiver provides outputs to both first and second output units. This dynamic reconfiguration allows the system to maintain high data transmission capability while optimizing power consumption by utilizing existing receiver chains in different configurations rather than always activating multiple independent receivers.
Data Source
AI summary
A wireless terminal is provided that includes a first receiver that includes a first input unit configured to perform impedance matching on a first reception signal to output a first RF input signal. A first amplification unit is configured to amplify the first RF input signal to output one or more first RF output signals in an inter-band CA mode and an intra-band CA mode. A first output unit is configured to down-convert at least one of the one or more first RF output signals to a baseband. A second receiver includes a second output unit. In the intra-band CA mode, the one or more first RF output signals includes a first RF signal and a second RF signal, and the first amplification unit is further configured to provide the first output unit with the first RF signal and provide the second output unit with the second RF signal.