DARP Remote Station Co-Channel Interference Cancellation
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Solution Overview
Problem
Current wireless communication systems face limitations in network capacity due to co-channel interference (CCI) and adjacent channel interference (ACI), which restrict the number of simultaneous users and increase hardware costs when trying to accommodate peak demand during events like international football matches or festivals.
Innovation Solution
The implementation of Downlink Advanced Receiver Performance (DARP) technology in remote stations, which enables them to distinguish and demodulate signals from base stations using single or dual antenna interference cancellation methods, allowing for the use of the same channel by multiple users by differentiating between desired and unwanted signals, thereby increasing network capacity without requiring additional hardware.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If more base stations are added to increase network capacity, then network capacity is improved, but hardware costs increase
Solution Approach 1:
The patent changes the parameter of co-channel interference tolerance by implementing DARP technology that allows remote stations to distinguish between desired and unwanted signals on the same channel. This enables multiple users to share channels simultaneously without requiring additional base stations, thereby increasing network capacity without proportionally increasing hardware costs
Solution Approach 2:
The patent uses signal copying and differentiation techniques where remote stations receive and process multiple signal copies from the same base station, using correlation and cross-correlation methods to identify and separate desired signals from co-channel interferers, enabling multiple users to share the same physical channel
2Device complexity
If channels are allocated sequentially to remote stations, then channel assignment is simplified, but network capacity is limited by co-channel interference
Solution Approach 1:
The patent changes the interference tolerance parameter through DARP technology, allowing remote stations to operate with higher co-channel interference levels. This enables more remote stations to be assigned to the same channel simultaneously, increasing network capacity while maintaining manageable channel assignment procedures
Solution Approach 2:
The patent implements dynamic channel assignment and interference management where the system can adaptively allocate channels based on real-time interference conditions and remote station capabilities, allowing flexible multi-user channel sharing that maximizes network capacity
3Object-affected harmful factors
If cells are divided into sectors using sectored antenna arrays, then interference between remote stations is reduced, but network equipment costs increase
Solution Approach 1:
The patent uses signal copying and correlation techniques at the remote station to distinguish between desired and unwanted signals, effectively creating a virtual signal separation mechanism that replaces the need for physical sectored antenna arrays, reducing equipment costs while maintaining interference reduction benefits
Solution Approach 2:
The patent substitutes the mechanical/physical sectored antenna system with a signal processing-based solution where DARP technology processes received signals through correlation and cross-correlation operations to separate desired signals from interferers, eliminating the need for expensive sectored hardware
4Productivity
If cells are divided into smaller cells with additional base stations, then network capacity is increased, but co-channel and adjacent channel interference from neighboring cells increases
Solution Approach 1:
The patent changes the interference tolerance parameter through DARP technology, allowing remote stations to operate in smaller cells with higher interference levels. The technology enables the system to accommodate more cells while maintaining acceptable interference levels through advanced signal differentiation capabilities
Data Source
AI summary
Co-channel operation systems, methods, and devices are discussed in this document. Some embodiments can include remote stations configured for co-channel operation with one or more other remote stations. Remote stations can generally comprise a processor and a memory in electronic communication with the processor. Instructions can be stored in the memory, and when executed by the processor cause a remote station to receive a first data sequence from a first base station; use the first data sequence to distinguish a first signal transmitted by the first base station from unwanted signals transmitted by one or more other base stations; and demodulate the first signal. Other aspects, embodiments, and features are also claimed and described.