Compressed Uplink IQ Signal Combining Without Decompression
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Solution Overview
Problem
In signal relay devices for centralized/cloud RAN structures, the process of combining uplink signals involves decompression, summation, and recompression, leading to signal transmission delays due to the additional processing steps.
Innovation Solution
A method for combining compressed IQ data of uplink signals without decompression in the fronthaul section, involving signal receiving, input data processing, pre-processing, combining, and post-processing operations, which allows for direct summation of compressed data and minimizes delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If decompression and compression processes are performed to combine uplink signals, then signal combining can be achieved, but signal transmission delay increases
Solution Approach 1:
The patent changes the processing parameter from decompressed domain to compressed domain. By performing combining operations directly on compressed IQ data without decompression, the processing domain parameter is changed, eliminating the need for decompression and recompression while maintaining signal combining capability.
Solution Approach 2:
The patent inverts the conventional processing sequence. Instead of decompressing first then combining (traditional approach), it combines the compressed signals directly and then decompresses the result. This inversion of the processing order eliminates unnecessary decompression and recompression steps.
2Ease of operation
If decompression and compression processes are performed to combine uplink signals, then signal combining can be achieved, but processing complexity increases
Solution Approach 1:
The patent changes the processing parameter from decompressed domain to compressed domain. By performing combining operations directly on compressed IQ data, it eliminates the need for decompression and recompression processes, thereby reducing processing complexity while maintaining signal combining capability.
3Ease of operation
If decompression and compression processes are performed to combine uplink signals, then signal combining can be achieved, but processing time increases
Solution Approach 1:
The patent changes the processing parameter from decompressed domain to compressed domain. By performing combining operations directly on compressed IQ data without decompression, the processing time is reduced and signal processing efficiency is improved while maintaining signal combining capability.
Solution Approach 2:
The patent inverts the conventional processing sequence. Instead of decompressing first then combining (traditional approach), it combines the compressed signals directly and then decompresses the result. This inversion eliminates unnecessary decompression and recompression steps, reducing processing time and improving efficiency.
Data Source
AI summary
A method of combining compressed uplink signals according to one aspect of the present disclosure is a method of combining IQ data of uplink signals compressed without decompression by a block floating point compression method, a block scaling compression method, or a -law compression method.