Channel Bonding Throughput via Segmented Training Sequences
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Solution Overview
Problem
High-frequency wireless communication systems, such as those operating in the 60 GHz band, face challenges with high atmospheric attenuation and free space loss, which can be compensated by using phased arrays, but channel bonding techniques struggle with efficient channel estimation and antenna configuration, particularly when coexisting with legacy devices.
Innovation Solution
The use of channel estimation training sequences, including Golay sequences and complementary codes, to facilitate channel bonding and beamforming, allowing receivers to switch from omnidirectional to directional modes for improved link budget and throughput in multi-channel environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bonding is implemented to increase bandwidth, then throughput is improved, but channel estimation complexity increases
Solution Approach 1:
The patent segments the channel estimation process by using separate training sequences for each bonded channel. Each channel's training sequence is transmitted independently, allowing the receiver to estimate each channel's impulse response separately through correlation operations. This segmentation reduces the overall estimation complexity compared to treating the bonded channels as a single complex channel.
Solution Approach 2:
The patent applies preliminary action by transmitting channel estimation training sequences before actual data transmission on each bonded channel. These training sequences (including Golay sequences and complementary codes) are sent in advance to establish channel impulse responses, enabling the receiver to have channel state information ready before receiving data, thus simplifying the overall communication process.
2Loss of energy
If phased arrays are used to compensate for high atmospheric attenuation, then signal loss is reduced, but device complexity increases
Solution Approach 1:
The patent makes the antenna configuration universal by enabling it to operate in multiple modes: omnidirectional mode for initial detection and directional mode for optimized communication. The same antenna array can switch between these modes based on operational requirements, eliminating the need for separate antenna systems for different functions and reducing overall device complexity.
Solution Approach 2:
The patent applies dynamics by enabling the antenna configuration to dynamically switch between omnidirectional and directional modes. The receiver can adapt its antenna beamforming based on the detected signal characteristics and channel conditions, optimizing performance while managing complexity through adaptive rather than static configuration.
3Adaptability or versatility
If legacy devices are supported in multi-channel environments, then compatibility is improved, but signal detection difficulty increases
Solution Approach 1:
The patent introduces training sequences as an intermediary element that facilitates communication between legacy devices and modern channel bonding systems. These known sequences are transmitted on each bonded channel, allowing legacy devices to detect and synchronize to the signal without needing to understand the full channel bonding protocol, thus mediating the interaction between different device generations.
Solution Approach 2:
The patent applies self-service by enabling legacy devices to autonomously detect and synchronize to transmissions using correlation-based detection of training sequences. The legacy devices can independently identify channel characteristics and adjust their reception parameters without requiring complex coordination with the channel bonding system, reducing the detection burden on the overall system.
Data Source
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AI summary
Certain aspects of the present disclosure provide methods and apparatus for performing communications using a bonded channel across multiple channels.