RF-Digital Unit Block Compression for Wireless Signal Transport
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for data transmission between a radio frequency (RF) unit and a digital unit in wireless communication systems are inefficient due to limited bandwidth, especially in systems like OFDM/SC-FDMA, where overhead such as cyclic prefix and guard bands increase data transmission amounts, necessitating a method to reduce data transmission without performance loss.
Innovation Solution
The RF unit and digital unit divide the frequency and time domains into blocks, set compression parameters based on signal characteristics and scheduling information, and compress data in block units, allowing efficient transmission and reception without additional parameter transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted using interface protocol between RF unit and digital unit, then communication reliability is maintained, but data transmission amount increases due to limited bandwidth
Solution Approach 1:
The patent segments the frequency and time domains into multiple blocks, allowing independent compression parameter settings for each block. This segmentation enables fine-grained optimization of compression ratios without compromising overall communication reliability, as each block can be processed and transmitted independently.
Solution Approach 2:
The patent applies different compression parameters to different blocks based on their specific signal characteristics. By analyzing signal properties (such as power spectral density, correlation coefficients) for each block and setting compression parameters accordingly, the system achieves higher overall compression ratios while maintaining quality where needed, thus reducing total data transmission amount without sacrificing reliability.
2Productivity
If OFDM/SC-FDMA is used for wireless communication, then spectral efficiency is improved, but data transmission amount increases due to overhead such as cyclic prefix and guard bands
Solution Approach 1:
The patent performs FFT conversion at the RF unit before transmission, converting time-domain signals with overhead (cyclic prefix, guard bands) into frequency-domain signals. This preliminary action removes the overhead components before data is sent to the digital unit, significantly reducing the data transmission amount while preserving the spectral efficiency benefits of OFDM/SC-FDMA.
Solution Approach 2:
The patent extracts and removes the overhead components (cyclic prefix, guard bands) from the OFDM/SC-FDMA signal by performing FFT conversion at the RF unit. This extraction eliminates unnecessary data that would otherwise need to be transmitted, reducing the data transmission amount while maintaining the core functionality and spectral efficiency of the modulation scheme.
3Quantity of substance
If compression parameters are optimized for each block, then data transmission amount is reduced, but device complexity increases due to parameter management
Solution Approach 1:
The patent dynamically adjusts compression parameters for each block based on real-time signal characteristics analysis. The system continuously monitors signal properties (power spectral density, correlation coefficients, etc.) and adapts compression parameters accordingly, achieving high compression ratios without requiring complex manual configuration or centralized control, thus managing device complexity effectively.
Solution Approach 2:
The patent implements self-service by having each block automatically analyze its own signal characteristics and determine appropriate compression parameters without external intervention. The system autonomously optimizes compression for each block based on local signal properties, reducing the need for complex centralized parameter management while achieving effective data transmission reduction.
Data Source
AI summary
A radio frequency (RF) unit, a digital unit, and methods of transmitting and receiving data in a wireless communication system are provided. The digital unit may include: a transceiver configured to receive compressed data from an RF unit, a processor configured to divide a frequency domain and a time domain into a plurality of blocks, set a compression parameter to be applied to each of the plurality of blocks, and expand the received data in units of the blocks based on the set compression parameter, and a memory storing the compression parameter.