High Frequency Communication Device Antenna Sub-array Delay Compensation
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Solution Overview
Problem
High frequency band communication devices face challenges in maintaining communication quality due to spatial attenuation, which increases circuit scale when using phased array antennas with many elements, leading to potential signal degradation and increased complexity.
Innovation Solution
A communication device with a control unit that dynamically compensates for communication quality degradation by determining compensation parameters such as antenna selection, frequency bandwidth, and delay compensation based on control information exchanged with communication partners, allowing for flexible adjustment of parameters like phase adjustment and delay compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of antenna elements is increased to compensate for spatial attenuation, then communication capacity is improved, but circuit scale and device complexity increase
Solution Approach 1:
The patent divides the antenna array into multiple sub-arrays, with each sub-array having its own ADC. This segmentation allows the system to process signals from large numbers of antenna elements without requiring a single massive ADC, thereby maintaining high communication capacity while reducing the complexity of individual circuit components.
Solution Approach 2:
The patent introduces a spatial dimension to the signal processing architecture by using multiple ADCs distributed across different spatial locations (sub-arrays). This dimensional approach allows parallel processing of signals from multiple antenna groups, achieving high capacity without proportionally increasing overall circuit complexity.
2Reliability
If delay compensation is applied to all antennas, then communication quality is improved, but device complexity and cost increase due to requiring ADC and DAC for each antenna element
Solution Approach 1:
The patent implements delay compensation by segmenting the antenna array into sub-arrays, each with its own ADC. This allows delay compensation to be applied effectively to manage path length differences while avoiding the need for individual DACs in every antenna element, thus improving communication quality without proportionally increasing device complexity.
Solution Approach 2:
The patent introduces intermediate processing stages (sub-array level ADCs and digital signal processing) that mediate between the physical antenna elements and the final signal processing. This intermediary approach enables effective delay compensation while maintaining reasonable circuit complexity by performing compensation operations at the digital domain after selective ADC conversion.
3Productivity
If wideband communication is used, then communication capacity is improved, but path length difference becomes non-negligible causing symbol reception degradation
Solution Approach 1:
The patent applies delay compensation as a preliminary action before signal composition and processing. By pre-adjusting for path length differences in the received signals from different antenna elements and sub-arrays, the system ensures that symbols arrive synchronized for proper reception, thereby maintaining reliable communication quality in wideband scenarios.
Solution Approach 2:
The patent dynamically adjusts delay compensation parameters based on the wideband communication requirements and path length differences. By changing the delay parameters adaptively, the system maintains proper symbol synchronization across the wide bandwidth, ensuring reliable reception while preserving the high capacity benefits of wideband operation.
Data Source
AI summary
Provided is a communication device including a plurality of antenna elements and that performs wireless communication in a high frequency band while suppressing the circuit scale.The communication device includes: a communication unit that transmits and receives a wireless signal using a plurality of antenna elements; and a control unit that controls compensation for degradation in communication quality in the communication unit on the basis of control information received from outside. The communication unit includes a plurality of wireless interfaces and a delay compensation unit that compensates for delay of the wireless interfaces. The control unit determines whether or not to perform the compensation on the basis of capability information exchanged with a communication partner.