Two-Way Relaying Beamforming Precoding Matrix Optimization
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Solution Overview
Problem
Current two-way relaying systems face challenges in efficiently determining communications channels and managing computational overhead, which affects the performance and cost-effectiveness of relay nodes and communications devices.
Innovation Solution
The implementation of a method and system for two-way relaying with beamforming, where relay nodes estimate communications channels, store transmissions, and use precoding matrices to enhance sum-rate performance, allowing for accurate channel determination without complex signaling techniques, and distributing computational tasks among devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional one-way relaying systems are used with uplink and downlink transmission, then the system implementation is simpler, but the link efficiency and overall communications system performance are lower
Solution Approach 1:
The patent implements a dynamic two-way relaying system where the relay node switches between receiving transmissions from different communications devices in different time slots. The system dynamically adapts the transmission direction and precoding matrices based on channel conditions, achieving higher link efficiency while managing complexity through structured time-division multiplexing
Solution Approach 2:
The patent changes the transmission mode parameter from traditional one-way (uplink/downlink) to two-way simultaneous transmission. By modifying the transmission protocol to allow bidirectional communications and using precoding matrix adjustments, the system achieves improved link efficiency without requiring completely new hardware architectures
2Measurement precision
If complex signaling techniques are used to determine communications channels in two-way relaying systems, then the channel estimation accuracy is improved, but the computational overhead and operational costs increase
Solution Approach 1:
The patent applies preliminary channel estimation during the multiple access phase where communications devices transmit to the relay node. The relay node uses these preliminary estimates to construct precoding matrices before the broadcast phase, avoiding the need for complex real-time channel determination during data transmission and reducing computational overhead
Solution Approach 2:
The communications devices themselves transmit reference signals and channel information to the relay node during the multiple access phase. The relay node utilizes these self-provided signals from the devices to perform channel estimation and construct precoding matrices, eliminating the need for separate complex signaling protocols
Data Source
AI summary
A system and method for two-way relaying with beamforming are provided. A method for relay operations includes estimating communications channels between a relay and communications devices coupled to the relay, storing data contained in the transmissions, storing data contained in the transmissions, precoding a transmission including a subset of the stored data with a precoding matrix, and transmitting the precoded transmission. The estimating is based on transmissions made by the communications devices in the subset of communications devices, and the precoding matrix is based on estimates of the communications channels.