Multi-Pilot Generation for MIMO Channel Estimation
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Solution Overview
Problem
MIMO systems require additional resources to generate and distribute separate preamble sequences for channel estimation and frequency offset elimination, leading to increased resource utilization.
Innovation Solution
A multi-pilot generation method that superimposes a third preamble sequence on a first preamble sequence, converting them from serial to parallel and transmitting them through space division, allowing for simultaneous channel estimation and frequency offset detection using a single set of resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate preamble sequences are generated for channel estimation and frequency offset elimination, then the accuracy of channel estimation and frequency offset detection is improved, but the system resource consumption increases
Solution Approach 1:
The patent combines channel estimation pilot and frequency offset elimination pilot into a single integrated preamble sequence. The first preamble sequence contains both channel estimation information and frequency offset elimination information, eliminating the need for separate pilot sequences while maintaining the accuracy of both functions.
Solution Approach 2:
The first preamble sequence is designed to serve multiple functions simultaneously: it provides channel estimation capability and frequency offset elimination capability. By making the preamble sequence universal, the system reduces resource consumption while maintaining the precision of both channel estimation and frequency offset detection.
2Reliability
If separate preamble sequences are generated for channel estimation and frequency offset elimination, then the reliability of synchronization is improved, but the device complexity increases
Solution Approach 1:
The patent merges the generation processes of channel estimation pilot and frequency offset elimination pilot into a single integrated preamble sequence generation process. This reduces the complexity of sequence generation while maintaining synchronization reliability through the inclusion of both functional components in the first preamble sequence.
Solution Approach 2:
The integrated preamble sequence is designed to perform multiple synchronization functions simultaneously, reducing the number of separate generation processes needed. This universal approach maintains reliability by ensuring both channel estimation and frequency offset elimination are covered, while reducing device complexity by eliminating redundant generation mechanisms.
3Measurement precision
If pilot energy is increased to guarantee accuracy of synchronization and channel estimation, then the measurement precision is improved, but the energy consumption increases
Solution Approach 1:
The patent combines channel estimation and frequency offset elimination into a single integrated pilot sequence, eliminating redundant energy consumption. By transmitting one integrated first preamble sequence instead of multiple separate pilots, the system reduces total energy expenditure while maintaining the precision of both functions through efficient resource allocation within the integrated sequence.
Data Source
AI summary
Provided are a multi-pilot generation method and a detection method in a multi-antenna communication system. In the method, a transmission side superimposes a first preamble sequence and a third preamble sequence to generate a second preamble sequence, which is subjected to serial/parallel conversion before the first preamble sequence and the second preamble sequence are successively transmitted from a plurality of antennas by time division. A reception side receives the first preamble sequence and the second preamble sequence by a plurality of antennas, separates the third preamble sequence from the second preamble sequence by a spatial division process, and performs a pilot correlation process by using the first preamble sequence and the separated third preamble sequence.