Pilot Repetition Receiver Adaptation for Wireless MIMO
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Solution Overview
Problem
In wireless communication systems, particularly in MIMO systems, there is a need to improve data reception efficiency by reducing the time required for channel bonding and decoding headers, as existing methods often require complex hardware and lengthy processes like equalization and frequency correction.
Innovation Solution
The use of pilot repetitions in the short training field (STF) of wireless communication frames allows for estimations of gain, linearity, DC/LO leakage, phase noise, and noise/interference before data transmission, enabling the receiver to adapt its operations without needing a wideband receiver, thus simplifying hardware requirements and reducing the need for complex corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex hardware and lengthy processes like equalization and frequency correction are used, then data reception accuracy is improved, but the time required for channel bonding and decoding headers increases
Solution Approach 1:
The patent performs gain, linearity, DC/LO leakage, phase noise, and noise/interference estimations using pilot repetitions in the STF before data transmission begins. This preliminary adaptation allows the receiver to be pre-configured with accurate channel characteristics, eliminating the need for lengthy equalization and frequency correction processes during data reception, thus reducing header decoding time while maintaining high data reception accuracy
2Measurement precision
If a wideband receiver is used for accurate channel estimation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent enables the receiver to adapt its operations autonomously by using pilot repetitions embedded in the STF. The receiver extracts channel characteristics (gain, linearity, DC/LO leakage, phase noise, noise/interference) directly from these pilot sequences and uses them to configure its own operation parameters. This self-service approach achieves accurate channel estimation without requiring complex wideband receiver hardware, as the estimation is performed on the available pilot signals using simplified processing
Data Source
AI summary
Receive operations at a receiver may be improved by performing one or more estimations before receiving data. For example, the time between the end of the header transmission and the start of the data transmission may be used to send patterns to be used for an estimation. In some implementations, sequences of pilot repetitions may be used to adapt the operation of a receiver. In some implementations, short training fields may be used to adapt the operation of a receiver.