Downlink Signal Processing Inversion for Memory Reduction
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Solution Overview
Problem
Existing downlink signal processing methods require large memory and register resources, leading to excessive power consumption and reduced efficiency due to the increased number of bits after modulation processes like QPSK or QAM, which are common in 5G NR scenarios.
Innovation Solution
The proposed method performs resource element mapping followed by modulation, reversing the typical order to reduce the storage requirements and power consumption by avoiding the need to buffer large amounts of data in RAM or registers, while maintaining the integrity of the processing result.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If modulation is performed before resource element mapping in existing downlink signal processing methods, then the signal can be properly modulated and mapped to resource elements, but the number of bits increases significantly (from few bits to many bits), requiring large memory and register resources, leading to excessive power consumption and reduced processing efficiency
Solution Approach 1:
The patent inverts the conventional processing order by performing resource element mapping before modulation instead of after. This reversal prevents the expansion of bit width that occurs during modulation, thereby reducing memory and register resource requirements and lowering power consumption while maintaining correct signal processing outcomes
2Reliability
If modulation is performed before resource element mapping, then the signal processing follows conventional methods, but the increased number of bits requires large quantities of memory and register resources, reducing processing efficiency
Solution Approach 1:
By inverting the processing sequence to map resource elements before modulation, the patent avoids the bit expansion that reduces processing efficiency. The inverted order allows processing to proceed with fewer bits throughout the pipeline, improving throughput and efficiency while maintaining correct results
3Reliability
If modulation is performed before resource element mapping, then conventional signal processing is achieved, but large memory and register resources are required, increasing device complexity
Solution Approach 1:
The patent applies inversion by reversing the conventional order of operations to perform resource element mapping before modulation. This approach prevents the significant increase in bit width that occurs during modulation, thereby reducing the memory and register resources needed and simplifying the overall device complexity while maintaining correct signal processing
Data Source
AI summary
Disclosed are a downlink signal processing method and apparatus, a base station, and a non-transitory computer-readable medium. The downlink signal processing method may includes performing resource element mapping on an unmodulated downlink signal, and performing modulation on the downlink signal that has been subjected to the resource element mapping to obtain modulated data.