Line of Sight MIMO Antenna Parameter Determination
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Solution Overview
Problem
Current Multiple Input Multiple Output (MIMO) communication technologies face challenges in determining necessary parameters and conditions for optimal performance in line of sight environments, particularly in achieving high data rates without increasing power and bandwidth.
Innovation Solution
The method involves receiving reference signals at a receiving device to measure a channel matrix, extracting line of sight channel parameters based on antenna element spacings, and transmitting these parameters to the transmitting device to optimize antenna configurations and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MIMO devices use multiple transmit and receive antennas to increase capacity and achieve high data rates, then data transmission capacity is improved, but the devices do not know the necessary parameters and conditions for proper performance in line of sight environment
Solution Approach 1:
The patent applies preliminary action by having the receiving device measure the channel matrix and extract line of sight parameters before data transmission occurs. The receiver determines antenna element spacings and channel parameters in advance, then transmits this information to the transmitter so that both devices can optimize their antenna configurations before actual high-rate data transmission begins.
2Productivity
If antenna element spacings are optimized for line of sight MIMO communication, then channel capacity is maximized, but requiring determination of multiple channel parameters including transmitting device antenna element spacing, receiving device antenna element spacing, and link range
Solution Approach 1:
The patent applies the extraction principle by having the receiving device measure the complete channel matrix and then extract only the specific line of sight parameters needed for optimization. Instead of requiring both devices to determine all parameters independently, the receiver extracts the transmitting device antenna element spacing, receiving device antenna element spacing, and link range from the channel matrix measurements and transmits only these extracted parameters to the transmitter.
Solution Approach 2:
The patent applies feedback by having the receiving device transmit the extracted line of sight parameters back to the transmitting device. This feedback loop enables the transmitter to adjust its antenna configuration based on actual channel conditions measured by the receiver, optimizing the MIMO performance for line of sight communication.
Data Source
AI summary
A method and apparatus determine parameters and conditions for line of sight MIMO communication. A transmitter can transmit reference symbols from a regularly spaced subset of a set of transmitting device antenna elements of the transmitter with elements spanning one or more spatial dimensions. The transmitter can signal transmit antenna element spacings in each dimension that can be used by the transmitter for data transmission.