PUCCH Format 1 Signal Processing Using Time Domain Transformation
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Solution Overview
Problem
Processing of Physical Uplink Control Channel (PUCCH) Format 1 (FMT1) signals in wireless communications becomes complex and resource-intensive as the number of multiplexed user equipment (UEs) increases, leading to reduced network capacity due to the need for numerous correlations in the frequency domain.
Innovation Solution
Processing PUCCH FMT1 signals in the time domain allows for collective operations across multiple UEs, reducing complexity and resource consumption by performing Inverse Discrete Fourier Transform (IDFT) and extracting data blocks based on unique cyclic shifts, thereby enhancing network capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency domain processing is used for PUCCH FMT1 signals, then signal processing can be performed, but processing complexity and resource consumption increase linearly with the number of multiplexed UEs
Solution Approach 1:
The patent transforms the signal processing domain from frequency domain to time domain by applying Inverse Discrete Fourier Transform (IDFT). This dimensional change allows the system to process multiple multiplexed UEs simultaneously through collective operations in the time domain, eliminating the linear complexity increase that occurs with frequency domain processing. The time domain approach enables a single processing operation to handle all multiplexed UEs regardless of their number.
2Productivity
If frequency domain processing is used for PUCCH FMT1 signals, then signal processing can be performed, but processing time and computing resources consume excessively
Solution Approach 1:
By transitioning from frequency domain to time domain processing through IDFT, the patent enables parallel processing of multiple UEs within a single time domain operation. This eliminates the sequential processing requirement inherent in frequency domain approaches, significantly reducing processing time and computing resource consumption while maintaining the ability to serve multiple multiplexed UEs simultaneously.
3Ease of operation
If frequency domain processing is used for PUCCH FMT1 signals, then signal processing can be performed, but the number of correlations required increases linearly with the number of UEs
Solution Approach 1:
The patent applies IDFT to transform the processing domain, which fundamentally changes how correlations are performed. Instead of requiring separate correlation operations for each UE in the frequency domain, the time domain approach enables a single collective operation that simultaneously processes all multiplexed UEs. This reduces the number of required correlations from linear growth to a constant number of operations regardless of UE count.
Data Source
AI summary
A network device includes receiver circuitry and a processor. The receiver circuitry is configured to receive a signal from a plurality of terminal devices, over a physical uplink control channel (PUCCH) format 1 (FMT1). The processor is coupled to the receiver circuitry, and is configured to perform processing on the received signal to obtain decoded data corresponding to the plurality of terminal devices, and utilize the decoded data for handling further communications with the plurality of terminal devices. In the processing, the processor is configured to obtain a demodulated signal sequence from the received signal. The processor is further configured to perform, on the demodulated signal sequence, a transform from a frequency domain into a time domain to obtain a time domain sequence. The processor is further configured to extract, from the time domain sequence, one or more data blocks corresponding to each terminal device among the plurality of terminal devices.