Intra-symbol Multiplexing Using Device-specific Cyclic Prefixes
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently multiplexing multiple messages into a single combined signal within a symbol period without causing interference, particularly due to signal leakage between different fractions of a symbol.
Innovation Solution
The implementation of intra-symbol multiplexing configurations using cyclic prefixes and guard intervals, which are device-specific or channel-specific, to separate signals within a symbol period, ensuring that signals do not leak into subsequent fractions and cause interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple messages are multiplexed into a single combined signal within a symbol period, then resource utilization and communication efficiency are improved, but signal leakage between different fractions of the symbol causes interference and deteriorates communication reliability
Solution Approach 1:
The symbol period is segmented into multiple fractions, with each fraction allocated to different messages or channels. This segmentation allows multiple messages to be multiplexed within the same symbol period while maintaining separation through device-specific or channel-specific cyclic prefixes and guard intervals, thus improving resource utilization without causing interference between messages
Solution Approach 2:
Cyclic prefixes and guard intervals are introduced as intermediary elements between different message fractions within a symbol period. These intermediaries prevent signal leakage and interference between multiplexed messages, enabling reliable intra-symbol multiplexing while maintaining high resource utilization
2Reliability
If device-specific or channel-specific cyclic prefixes and guard intervals are introduced to prevent signal leakage, then communication reliability is improved, but the complexity of the multiplexing configuration increases
Solution Approach 1:
Instead of applying a uniform cyclic prefix configuration across all messages, the patent applies device-specific or channel-specific cyclic prefixes and guard intervals tailored to each message fraction's requirements. This local customization prevents signal leakage effectively while allowing the system to manage complexity through standardized configuration methods
3Productivity
If fractional time domain resource allocation is implemented within a symbol period, then communication efficiency is improved, but signal interference between fractions deteriorates reliability
Solution Approach 1:
Cyclic prefixes and guard intervals are preliminarily introduced at the beginning of each fraction within the symbol period before the actual message transmission. This preliminary action prevents signal leakage from previous fractions and establishes clear boundaries between fractional allocations, enabling efficient resource utilization without interference
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. Devices in a wireless communications system may support different configurations to support intra-symbol multiplexing for communications between the devices using a single carrier waveform. For example, the different configurations may include symbol level cyclic prefixes, device-specific or channel-specific cyclic prefixes, device-specific or channel-specific guard intervals, or a combination thereof to support the intra-symbol multiplexing. That is, the cyclic prefixes or guard intervals may separate different fractions of a symbol, such that individual signals communicated in each of the different fractions do not leak into a subsequent fraction to cause interference. In some implementations, the cyclic prefixes or guard intervals may be enabled for a subset of devices or channels. A configuration for this intra-symbol multiplexing with device-specific or channel-specific cyclic prefixes or guard intervals may be signaled in a control message to the corresponding devices.