Distributed Antenna Node Unit Signal Processing
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Solution Overview
Problem
The digital distributed antenna system faces challenges in maintaining appropriate transmission capacity and cost competitiveness due to limited transmission resources, leading to reduced signal transmission capacity and increased costs.
Innovation Solution
A node unit and signal processing method that extracts and combines sample data corresponding to occupied frequency bands from digitized analog RF signals, resamples, bit-compresses, and dynamically allocates data to reduce transmission capacity and resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission resources are increased to guarantee service quality of multiple service providers, then service quality is improved, but system cost increases
Solution Approach 1:
The patent segments the frequency spectrum into multiple virtual channels, allowing multiple service providers to share the same physical transmission resources. Each service provider is allocated specific frequency bands (e.g., first frequency band for first provider, second frequency band for second provider), enabling simultaneous service delivery over a single transmission link without requiring separate physical resources for each provider.
Solution Approach 2:
The patent implements a universal transmission resource that can serve multiple service providers simultaneously through frequency division multiplexing. A single transmission link between node units can carry signals for multiple service providers by allocating different frequency bands, making the transmission resource multi-functional and eliminating the need for dedicated resources for each provider.
2Reliability
If transmission capacity is increased to support multiple service providers, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the frequency spectrum into distinct bands that can be independently allocated to different service providers. The node units implement frequency division multiplexing by separating and processing signals in different frequency bands, allowing multiple providers to share the same physical infrastructure without increasing system complexity.
Solution Approach 2:
The patent changes the frequency parameter of transmission signals to accommodate multiple service providers. By allocating different frequency bands (first frequency band, second frequency band, etc.) to different providers, the system can support multiple services simultaneously using the same physical resources, avoiding the need for complex multi-link architectures.
3Reliability
If frequency bands are allocated to multiple service providers, then service quality is improved, but transmission resource waste occurs when not all bands are occupied
Solution Approach 1:
The patent implements dynamic frequency band allocation where the system can adaptively assign frequency bands to service providers based on actual service requirements and occupancy. When certain frequency bands are not occupied by any service provider, the system can reallocate those bands to other providers or uses, ensuring optimal utilization of transmission resources and eliminating waste from static allocation.
Solution Approach 2:
The patent enables dynamic adjustment of frequency band allocation parameters based on real-time service demands. The system can modify which frequency bands are assigned to which service providers, allowing flexible resource utilization that adapts to changing occupancy patterns and minimizes wasted transmission capacity.
Data Source
AI summary
According to an aspect of the inventive concept, there is provided a signal processing method performed in a distributed antenna system, includes extracting at least a part of sample data corresponding to an occupied frequency band from a digitized analog RF signal; and combining the extracted sample data.