5G PUCCH Signal Transmission via Frequency-Domain Segmentation
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Solution Overview
Problem
In 5G wireless communication systems, there is a challenge in simultaneously transmitting pilot signals and data while maintaining a low peak-to-average ratio, particularly due to the limited capacity of the Physical Uplink Control Channel (PUCCH) which can become a bottleneck for cell coverage.
Innovation Solution
The method involves using predefined sequences, such as Zadoff-Chu sequences, to modulate data and reference signals at specific points within a transmission symbol, allowing for simultaneous transmission of data and reference signals while maintaining a low peak-to-average ratio by dividing the sequence into groups and mapping them onto subcarriers, and using non-coherent demodulation to recover the modulation symbols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pilot signals and data are simultaneously transmitted using conventional methods, then communication functionality is provided, but peak-to-average ratio increases and cell coverage is limited
Solution Approach 1:
The transmission resource is segmented into two distinct parts: pilot signals are transmitted on even-numbered subcarriers while data signals are transmitted on odd-numbered subcarriers. This frequency-domain segmentation allows both signals to coexist without interfering with each other, while maintaining a low peak-to-average ratio and improving cell coverage through enhanced uplink control channel capacity.
2Productivity
If PUCCH capacity is increased to improve cell coverage, then more users can be served, but system complexity and interference management become more difficult
Solution Approach 1:
The PUCCH resources are segmented by assigning even subcarriers to pilot signals and odd subcarriers to data signals. This segmentation increases the capacity of the uplink control channel to serve more users simultaneously while maintaining manageable system complexity through a clear, structured resource allocation scheme that simplifies interference management.
Solution Approach 2:
The patent transitions from time-domain or code-domain multiplexing to frequency-domain segmentation, utilizing the subcarrier dimension to simultaneously transmit pilot and data signals. This dimensional change increases PUCCH capacity while keeping the system structure relatively simple and interference management straightforward.
Data Source
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AI summary
Provided is a signal transmission method including: obtaining a first sequence having a length of N, N being a positive integer; modulating a first modulation symbol at M positions of the first sequence, where the first modulation symbol represents a modulated signal, M is a positive integer less than N; and transmitting the first sequence carrying the first modulation symbol over a transmission symbol; or dividing the M positions of the first sequence into G groups, modulating a same modulation symbol in each of the G groups, where the modulation symbol represents a modulated signal, G is an integer equal to or greater than 2, and equal to or less than N; and transmitting the first sequence carrying the modulation symbol of each of the G groups over the transmission symbol. Further provided are a signal receiving method, a signal transmission device, a signal receiving device and a storage medium.