Joint Channel Estimation Under Repeater Phase Continuity Conditions
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Solution Overview
Problem
Joint channel estimation in wireless communication systems is compromised by phase changes introduced by repeater nodes, particularly smart repeaters with control planes, leading to inaccurate channel estimation and reduced transmission quality.
Innovation Solution
Implement additional control signaling between wireless nodes to indicate phase and power consistency conditions, and configure repeater nodes to maintain phase and power continuity during specific time durations to enable joint channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If joint channel estimation is performed using all reference signals in all slots, then channel estimation quality is improved, but accuracy deteriorates when channel conditions change between slots due to repeater node interference
Solution Approach 1:
The transmitting node performs preliminary action by determining the repeater node's capability to maintain phase continuity and power consistency before channel estimation, and proactively transmits indication information to the receiving node. This allows the receiving node to pre-select the appropriate channel estimation method (joint or separate) based on the indicated condition, avoiding inaccurate estimations caused by repeater interference and ensuring reliable channel estimation results.
2Productivity
If repeater nodes are used to relay transmissions, then transmission coverage is extended, but phase discontinuity and power inconsistency are introduced that disrupt channel estimation
Solution Approach 1:
The system implements feedback by having the transmitting node assess the repeater node's capability to maintain signal characteristics and transmit indication information about phase continuity and power consistency to the receiving node. This feedback mechanism enables the receiving node to adapt its channel estimation approach accordingly, allowing repeater nodes to extend coverage while maintaining estimation accuracy through informed decision-making based on the indicated conditions.
3Device complexity
If channel estimation is performed on a single reference signal in a single slot, then processing complexity is reduced, but channel estimation quality deteriorates compared to joint estimation across multiple slots
Solution Approach 1:
The system applies dynamics by making the channel estimation method adaptive rather than fixed. The receiving node dynamically selects between joint channel estimation (using multiple slots) and separate channel estimation (using single slot) based on the received indication information about repeater node conditions. This dynamic adaptation allows the system to achieve high estimation quality when repeaters maintain signal consistency while avoiding the complexity of joint estimation when repeater interference is present, and to extend coverage to scenarios with single-slot transmissions.
Data Source
AI summary
A method is disclosed performed by a first wireless node, for enabling joint channel estimation in a time domain in a network. The method comprises determining a presence of a repeater node in a transmission path between the first wireless node and a second wireless node. The repeater node is enabled to relay a transmission between the first wireless node and the second wireless node. The method comprises transmitting, to the second wireless node, an indication indicating a condition associated with phase continuity and/or power consistency of the transmission between the first wireless node and the second wireless node.