Golay Sequence Channel Estimation Field for MIMO Interference
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Solution Overview
Problem
Current wireless communication systems, particularly in the millimeter wave frequency band, face challenges in maintaining signal integrity due to channel distortions, and existing channel estimation methods are not efficient for multi-input multi-output (MIMO) configurations, especially when dealing with legacy devices and high-order MIMO applications.
Innovation Solution
The use of Golay complementary sequences for channel estimation, which are generated and modulated by a Golay generator, transmitted, and received to estimate channel characteristics, allowing for efficient channel estimation and equalization, while also enabling backward compatibility with legacy devices through reuse and updating of legacy channel estimation field structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing channel estimation methods are used in MIMO configurations, then backward compatibility with legacy devices is maintained, but estimation accuracy and efficiency deteriorate due to channel distortions in millimeter wave frequency band
Solution Approach 1:
The patent segments the channel estimation process into separate time-domain and frequency-domain components. The time-domain channel estimation uses legacy CEF structures for backward compatibility, while the frequency-domain estimation handles MIMO-specific challenges. This segmentation allows the system to maintain compatibility with legacy devices while achieving accurate estimation in complex MIMO configurations.
Solution Approach 2:
The patent creates a universal channel estimation mechanism that serves multiple functions: it maintains backward compatibility with legacy devices through reuse of existing CEF structures, simultaneously supports high-order MIMO configurations, and provides accurate estimation in millimeter wave frequency band. The dual-domain approach (time and frequency) enables this multi-functionality.
2Adaptability or versatility
If legacy channel estimation field structures are reused, then compatibility with legacy devices is maintained, but estimation efficiency in high-order MIMO applications deteriorates
Solution Approach 1:
The patent segments the estimation task across two domains: time-domain estimation uses legacy CEF structures for compatibility, while frequency-domain estimation handles efficiency requirements for high-order MIMO. This segmentation allows legacy structures to serve their compatibility purpose without compromising overall estimation efficiency.
Solution Approach 2:
The patent transitions from single-domain (time-domain only) estimation to dual-domain (time and frequency) estimation. This dimensional change enables the system to leverage the simplicity of legacy time-domain structures while incorporating the efficiency benefits of frequency-domain processing for MIMO applications.
3Productivity
If multiple input multiple output techniques are implemented, then transmission data rate is increased, but channel distortions and signal integrity issues worsen
Solution Approach 1:
The patent implements feedback mechanisms through channel state information (CSI) acquisition and utilization. The channel estimation fields provide feedback about channel characteristics to the receiver, enabling the system to compensate for distortions introduced by MIMO techniques and maintain signal integrity at high data rates.
Solution Approach 2:
The patent replaces direct signal transmission with a two-stage process: first establishing channel characteristics through estimation fields, then using this information for equalization and signal recovery. This substitution of direct transmission with estimated-based processing enables reliable communication in MIMO systems.
Data Source
AI summary
This disclosure describes methods, apparatus, and systems related to a channel estimation field (CEF) for various standards, for example, the 802.11ay standard, for single carrier (SC) MIMO channel estimation. In one embodiment, the CEF can use Golay complementary sequences. In another embodiment, the Golay complementary sequences can be defined similar to Golay complementary sequences definitions that can be found in various legacy standards, for example, the legacy 802.11ad standard. Various embodiments of the disclosure can allow channel estimation in the time domain and/or frequency domain, having small or negligible inter-stream interference. Various embodiments of the disclosure can enable an extendable structure for various M×N MIMO configurations, where M and N are positive integers.