Collaborative UE Transceiving Across Bands for MIMO Rank Gain
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Solution Overview
Problem
Physical hardware limitations at the user equipment (UE) side hinder the improvement of massive multiple-input multiple-output (MIMO) performance in mobile communications.
Innovation Solution
Implementing device collaboration by transmitting identical baseband signals in different frequency bands between a primary communication apparatus and a collaborating communication apparatus, with inter-band frequency translation and precoding, to enhance transceiving capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If device collaboration is implemented to augment transceiving capability, then MIMO performance and effective rank are improved, but device complexity and coordination overhead increase
Solution Approach 1:
The patent segments the MIMO transmission function across multiple devices (primary UE and collaborating UE). Each device handles a portion of the transmission tasks, with the primary UE transmitting in a first frequency band and the collaborating UE transmitting in a second frequency band. This segmentation allows the system to achieve higher effective rank and MIMO performance while distributing the complexity across multiple devices rather than concentrating it in one device.
2Power
If identical baseband signals are transmitted in different frequency bands, then power-aggregation gain is achieved, but signal processing complexity increases
Solution Approach 1:
The patent applies parameter changes by transmitting identical baseband signals across different frequency bands (first frequency band and second frequency band). This frequency domain parameter variation enables power-aggregation gain at the receiver while maintaining signal integrity. The precoding operations adapt to different frequency characteristics, achieving power aggregation without requiring complex time-domain signal processing.
3Productivity
If inter-band frequency translation and precoding are implemented, then transceiving capability is augmented, but computational complexity increases
Solution Approach 1:
The patent implements preliminary action by performing precoding operations on the baseband signals before transmission in different frequency bands. The primary UE applies precoding to the first baseband signal before modulating to the first frequency band, and the collaborating UE applies precoding to the second baseband signal before modulating to the second frequency band. This preliminary signal processing prepares the signals for efficient transmission and reception, augmenting transceiving capability while managing computational complexity through structured preprocessing.
Data Source
AI summary
Examples pertaining to transceiving capability augmentation of a communication apparatus in mobile communications are described. A user equipment (UE) transmits a first radio frequency (RF) signal carrying a first baseband signal in a first frequency band to a network node and transmits a second RF signal carrying a second baseband signal in a second frequency band to a collaborating communication apparatus. The first baseband signal and the second baseband signal are identical, and the first frequency band is different from the second frequency band.