Optimal Splitter Precoding for Limited Demodulation Capability
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Solution Overview
Problem
Next-generation wireless networks aim to increase data rates by using more downlink transmission streams, but some User Equipment (UE) are not capable of simultaneously demodulating the higher number of streams, leading to inefficient use of time-frequency resources and poor user experience.
Innovation Solution
The implementation of an optimal splitter precoder (OSP) that block-diagonalizes the wireless channel into separate sub-channels, allowing UEs with limited demodulation capability to efficiently demodulate a higher number of transmission streams by performing separate lower-order demodulations on each sub-channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network uses more downlink transmission streams to increase data rates, then the data carrying capacity is improved, but UEs with limited demodulation capability cannot efficiently process the signals
Solution Approach 1:
The patent applies segmentation by dividing the downlink transmission into multiple groups of transmission streams, where each group can be independently demodulated by the UE. This allows the network to transmit more streams overall while the UE only needs to demodulate a manageable number of streams from each group, resolving the contradiction between high data rates and limited UE demodulation capability.
2Productivity
If the network transmits more transmission streams, then the efficiency of time-frequency resources is improved, but the UE complexity increases
Solution Approach 1:
By segmenting the transmission streams into multiple groups that can be independently demodulated, the patent reduces UE processing complexity while maintaining efficient use of time-frequency resources. The UE processes each group separately rather than handling all streams simultaneously, making the system scalable to support more streams without proportionally increasing UE complexity.
3Productivity
If the network uses higher number of transmission streams, then the data carrying capacity is improved, but the user experience deteriorates due to poor signal quality
Solution Approach 1:
The patent improves signal quality by segmenting transmission streams into groups that can be independently demodulated with lower complexity. This segmentation allows for more robust demodulation of each group, maintaining signal quality even as the total number of transmission streams increases, thereby preserving user experience while enhancing data carrying capacity.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for optimal splitter precoding based on a user equipment (UE) demodulation capability. An example method performed by the UE includes receiving, from a network entity, a request for a demodulation capability of the UE, transmitting, to the network entity after receiving the request, a first message indicating the demodulation capability of the UE, receiving, from the network entity, a first downlink signal transmitted on a wireless channel using one or more groups of transmission streams comprising a first number of transmission streams, and demodulating the first downlink signal using a first demodulator corresponding to the first precoder. The first downlink signal may be precoded based on a first precoder and the first precoder may be based on the demodulation capability of the UE.