Millimeter-Wave Channel Multiplexing with Mixed Carrier Waveforms
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Solution Overview
Problem
In millimeter wave (mmWave) communication systems, high path loss and signal attenuation require high power transmission, making multi-carrier transmission difficult, and existing methods struggle to efficiently transmit synchronization and broadcast signals using a single carrier.
Innovation Solution
The BS configures and transmits synchronization signals and broadcast signals using different carrier waveforms, such as CP-OFDM and single carrier (SC), and allocates them in distinct frequency and time resources to optimize signal transmission and reception using a single carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-carrier transmission is used, then transmission efficiency and signal robustness are improved, but path loss and signal attenuation increase in mmWave bands
Solution Approach 1:
The patent segments the transmission signals into different types (synchronization signals, broadcast signals, data signals) and applies different waveform techniques to each segment. Synchronization and broadcast signals use single carrier waveform for robustness, while data signals can use multi-carrier waveform for efficiency, thus resolving the contradiction between transmission efficiency and path loss.
Solution Approach 2:
The patent applies different waveform qualities to different signal types based on their specific requirements. Single carrier waveform with lower PAPR is applied locally to synchronization and broadcast signals that require robustness against path loss, while multi-carrier waveform is applied to data signals where transmission efficiency is more critical.
2Loss of energy
If single carrier transmission is used, then path loss is reduced, but transmission efficiency and signal robustness deteriorate
Solution Approach 1:
The patent segments the transmission signals and applies different waveform techniques to each segment. Single carrier waveform is applied to synchronization and broadcast signals for robustness, while multi-carrier waveform is applied to data signals for efficiency, thus resolving the contradiction between path loss reduction and transmission efficiency.
Solution Approach 2:
The patent applies different waveform qualities to different signal types based on their specific requirements. Single carrier waveform is applied locally to signals requiring robustness, while multi-carrier waveform is applied to signals where efficiency is more critical.
3Reliability
If multiple signals are transmitted separately, then signal clarity is maintained, but time overhead increases
Solution Approach 1:
The patent merges synchronization signals, broadcast signals, and data signals into a unified transmission framework using a single carrier waveform. Different signal types are multiplexed in the time and frequency domains while maintaining their individual characteristics, thus reducing time overhead while preserving signal clarity.
Solution Approach 2:
The patent creates a universal single carrier waveform transmission mechanism that can handle multiple signal types (synchronization, broadcast, data) simultaneously. This multi-functional approach allows efficient resource utilization and reduced time overhead compared to separate transmissions.
Data Source
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AI summary
Disclosed are a communication scheme and a system thereof for converging an IoT technology and a 5G communication system for supporting a high data transmission rate beyond that of a 4G system. The disclosure can be applied to intelligent services (for example, services related to a smart home, smart building, smart city, smart car, connected car, health care, digital education, retail business, security, and safety) based on the 5G communication technology and the IoT-related technology. A method of receiving a synchronization signal block (SSB) by a UE in a wireless communication system may include: identifying whether a bandwidth of a cell transmitting an SSB which the UE desires to receive corresponds to a first frequency band (FR); when the bandwidth of the cell corresponds to the first frequency band, receiving the SSB using a single carrier waveform; and acquiring synchronization, based on the received SSB; and acquiring system information.