Wireless Power Control Unified Amplification Factor
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Solution Overview
Problem
In wireless communication systems, the need to adjust the amplification factor of radio frequency power amplifiers to prevent signal distortion leads to transmission performance deterioration and resource waste, particularly when different symbols have different transmit powers.
Innovation Solution
A power control method where the transmit power of control and data subchannels is coordinated to ensure that all symbols use the same amplification factor, with the control channel and first data subchannel overlapping in time domain and the second data subchannel overlapping with the control channel in frequency domain, allowing for unified power allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amplification factor of the radio frequency power amplifier is adjusted to prevent signal distortion, then signal transmission quality is improved, but transmission time is increased and resources are wasted
Solution Approach 1:
The patent applies preliminary action by pre-planning power allocation across multiple symbols in advance. The transmit end determines power values for multiple symbols before transmission, and the receive end pre-processes received signals using these known power values. This eliminates the need for real-time amplification factor adjustment during transmission, thereby preventing signal distortion without incurring transmission time delays or resource waste.
Solution Approach 2:
The patent implements dynamics by enabling flexible power allocation across different symbols while maintaining overall transmission efficiency. The system dynamically assigns different power values to different symbols based on channel conditions and requirements, allowing the amplification factor to remain constant while achieving adaptive power control. This dynamic power distribution prevents distortion without requiring time-consuming amplification adjustments.
2Adaptability or versatility
If the amplification factor is switched between adjacent symbols with different powers, then power allocation flexibility is improved, but transmission performance deteriorates due to distortion
Solution Approach 1:
The patent applies preliminary action by determining power allocation for multiple symbols in advance before transmission. The transmit end calculates and communicates power values for each symbol to the receive end beforehand. This pre-planned power distribution provides the needed flexibility in power allocation while avoiding real-time amplification factor switching that would cause distortion and performance deterioration.
Solution Approach 2:
The patent uses power indication information as an intermediary mechanism. Instead of directly switching amplification factors (which causes distortion), the system transmits power indication information between transmit and receive ends. The receive end uses this intermediary information to properly process and demodulate signals with different power levels, thereby achieving flexible power allocation without performance deterioration.
3Ease of operation
If one symbol gap is used as switching time period for hardware, then amplification factor switching is enabled, but communication resources are wasted
Solution Approach 1:
The patent extracts the power control function from the time domain (removing the need for symbol gap switching) and relocates it to the signal processing domain. By determining power allocation in advance and using power indication information, the system separates power control from the physical amplification switching process, thereby eliminating the need for dedicated symbol gaps while maintaining amplification factor adjustment capability.
Solution Approach 2:
The patent replaces the mechanical amplification factor switching mechanism (which requires physical time gaps for hardware transition) with a software-based power indication information system. The transmit end communicates power values through signaling, and the receive end processes signals accordingly. This substitution eliminates the need for symbol gap switching time periods, improving resource utilization while maintaining operational flexibility.
Data Source
AI summary
The present disclosure discloses example power control methods and apparatuses. One example method includes determining a transmit power of a control channel and a first data subchannel, where the control channel and the first data subchannel completely overlap in time domain and do not overlap in frequency domain. A transmit power of a second data subchannel is determined to be the same as the transmit power of the control channel and the first data subchannel, where the second data subchannel and the control channel overlap in frequency domain and do not overlap in time domain. The control channel and the first data subchannel are sent to a second terminal apparatus at the transmit power of the control channel and the first data subchannel. The second data subchannel is sent to the second terminal apparatus at the transmit power of the control channel and the first data subchannel.