Directional Sensing Spatial Multiplexing Interference Cancellation

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Solution Overview

Problem

Current wireless communication systems face complexity and inefficiency in implementing joint communication and radar sensing due to separate modules for communication and sensing, leading to self-interference and limited resource utilization, with no unified standard for coordination between the two operations.

Innovation Solution

The implementation of directional sensing and interference suppression techniques in user equipment (UE) to enable spatial multiplexing of communication and sensing signals, allowing for coordinated resource management and interference cancellation across modules, using configurations for monostatic or bistatic sensing with orthogonal frequency division multiplexing (OFDM) or orthogonal frequency division multiple access (OFDMA) techniques.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate modules for communication and sensing are implemented, then both communication and sensing functions can be provided, but device complexity and self-interference increase

Engineering Contradiction:

Improvecommunication and sensing functionalityVSAvoidmodule complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines communication and sensing functions into a unified module that uses shared antennas, RF chains, and baseband processing resources. The same hardware infrastructure performs both communication signal transmission/reception and radar sensing operations, eliminating the need for separate dedicated modules while reducing overall system complexity through resource sharing and coordinated operation.

Inventive Principle:

Principle #5Merging (Combining)

2Adaptability or versatility

If separate modules for communication and sensing are implemented, then both functions can operate independently, but resource utilization efficiency decreases

Engineering Contradiction:

Improveindependent operation capabilityVSAvoidresource utilization efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The unified module implements multi-functionality where the same antennas, RF chains, and processing units serve both communication and sensing purposes. The system dynamically allocates resources between the two functions based on operational requirements, enabling efficient resource utilization while maintaining the ability to perform both communication and radar sensing operations.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system employs dynamic resource allocation and coordination between communication and sensing operations. The unified module can adaptively adjust beamforming weights, time-frequency resources, and processing priorities based on real-time operational conditions, allowing efficient sharing of hardware resources while maintaining independent operational capabilities for both functions.

Inventive Principle:

Principle #15Dynamics

3Productivity

If communication and sensing signals are transmitted simultaneously, then resource utilization improves, but interference between signals increases

Engineering Contradiction:

Improveresource utilizationVSAvoidsignal interference

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The system applies spatial separation through beamforming to differentially treat communication and sensing signals in the angular domain. By directing communication beams and sensing beams into different spatial directions with orthogonal or near-orthogonal beamforming vectors, the system enables simultaneous transmission while minimizing mutual interference through localized spatial quality differentiation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system converts the potential harmful interference between communication and sensing signals into a beneficial coordinated operation. By intentionally designing the beamforming weights and spatial filters to account for the presence of both signals, the system achieves interference cancellation or suppression, allowing simultaneous transmission to improve overall resource utilization while maintaining signal quality through coordinated signal processing.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20230388815A1Directional sensing in cellular systems

Publication Date: 2023.11.30 SAMSUNG ELECTRONICS CO LTD

AI summary

Directional sensing capability, including number of beams, beam-width, analog or digital beam sweeping, and supported waveforms, may be indicated by a user equipment (UE), which may then receive a configuration for directional sensing including number of beams, maximum or minimum beam-width, reception time between transmission beam sweeping, and waveform. The UE then performs directional sensing based on the received configuration. The configuration for directional sensing may be for one of monostatic sensing with reception periods between consecutive sensing signal transmissions or bistatic sensing using a plurality of beams. The UE's directional sensing capability may include capability of spatial multiplexing of sensing signals with communication signals. The configuration for directional sensing may permit spatial multiplexing of sensing signals with communication signals. The UE may determine to perform spatial multiplexing of sensing signals with communication signals based on orthogonality of a desired sensing beam with a beam for communications.