Wireless Signal Compression for Linear RF Amplification
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Solution Overview
Problem
Conventional wireless transmission systems face issues with high power consumption, significant waste heat removal, and high equipment costs due to the need for multiple amplifiers in series, which can cause intermodulation effects and reduce wireless network coverage areas.
Innovation Solution
The system analyzes incoming signals to detect regions likely to cause intermodulation and applies a compression signal to reduce amplitude peaks, allowing amplification within linear regions, thereby reducing intermodulation effects and the need for expensive amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple amplifiers in series are used to achieve sufficient amplification, then the amplification gain is improved, but the power consumption increases and heat removal becomes significant
Solution Approach 1:
The system applies compression to the input signal before amplification to reduce peak-to-average power ratio. This preliminary action allows the amplifier to operate more efficiently by preventing signal peaks from driving the amplifier into non-linear regions, thereby reducing the need for multiple amplifiers and decreasing overall power consumption while maintaining sufficient amplification gain.
2Power
If multiple amplifiers in series are used to achieve sufficient amplification, then the amplification gain is improved, but the equipment cost increases
Solution Approach 1:
By applying compression to the input signal before amplification, the system enables a single amplifier to achieve the required amplification gain that would otherwise require multiple amplifiers in series. This reduces equipment complexity and cost while maintaining the necessary power output level.
3Reliability
If amplification occurs in linear region, then the signal fidelity is improved, but the amplifier operates less efficiently and consumes more power
Solution Approach 1:
The compression function is applied before amplification to reduce the peak-to-average power ratio of the signal. This allows the amplifier to operate in a more efficient region while maintaining signal fidelity, as the compressed signal prevents the amplifier from being driven into non-linear regions by high peak power demands.
4Power
If signal peaks are amplified, then the peak power output is improved, but intermodulation effects occur and wireless coverage area is reduced
Solution Approach 1:
The system applies compression to the input signal before amplification to reduce peak-to-average power ratio. This preliminary compression prevents signal peaks from causing intermodulation effects in the amplifier, allowing the system to maintain high peak power output capability while eliminating the harmful intermodulation distortion that would otherwise reduce wireless coverage area.
Data Source
AI summary
Compression of an input signal prior to high power radio frequency (RF) amplification and transmission is disclosed. A compression device can receive an input signal and generate a compressed signal that can be passed to an amplification stage to reduce intermodulation effects. The compression device can further generate compression information that can be transmitted to enable a mobile device receiving an amplified version of the compressed signal and the compression information to decompress the amplified version of the compressed signal. Further, a mobile device that can receive an amplified compressed signal and compression information, such that the mobile device can decompress the amplified compressed signal, is also disclosed. The disclosed subject matter can enable use of lower cost, smaller, and less complex RF amplifiers within a wireless network environment.