Low-Resolution RF Receiver for Millimeter Wave Power Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in achieving low latency and high data rates at millimeter wave frequencies due to high power consumption and inefficiencies in amplification, particularly in massive MIMO deployments, where traditional high-linearity designs are impractical and power-intensive.
Innovation Solution
The implementation of low-resolution, low-power radio frequency (RF) receivers and transceivers that utilize nonlinear signal processing, such as single-bit or few-bit transmitters and receivers, which combine RF signals with local oscillator signals without multiplication, enabling efficient beamforming in the digital domain and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional high-linearity RF designs are used at millimeter wave frequencies, then signal quality and data rates are improved, but power consumption increases significantly
Solution Approach 1:
The patent changes the operating parameters of the RF receiver by using low-resolution (1-bit or few-bit) analog-to-digital converters instead of traditional high-resolution converters. This parameter change reduces the power consumption and complexity of the RF front-end while maintaining acceptable performance through digital signal processing compensation
Solution Approach 2:
The patent substitutes traditional analog RF processing mechanisms with digital processing approaches. By moving more processing functions to the digital domain and using nonlinear signal processing techniques, the system achieves efficient beamforming and signal recovery without requiring high-linearity analog components that consume excessive power
2Productivity
If massive MIMO deployments are implemented at millimeter wave frequencies, then capacity and data rates are improved, but power consumption and thermal load increase
Solution Approach 1:
The patent segments the RF receiver architecture into multiple low-power units, each with simplified analog processing and low-resolution ADCs. This segmentation allows massive MIMO deployments to scale capacity by adding more units without proportionally increasing the power consumption of each individual receiver chain
Solution Approach 2:
The patent changes the resolution parameter of the ADCs from traditional high-resolution (e.g., 12-bit or higher) to low-resolution (1-bit or few-bit), dramatically reducing the power consumption and complexity of each receiver chain while maintaining system capacity through digital processing
3Power
If high-gain directive antennas are used at millimeter wave frequencies, then link power is maintained, but device complexity and size increase
Solution Approach 1:
The patent substitutes complex analog beamforming mechanisms with digital beamforming approaches. By using low-resolution ADCs and performing beamforming operations in the digital domain, the system achieves the necessary signal gain and directionality without requiring complex analog phase shifters and amplitude controllers
Data Source
AI summary
Aspects of the subject disclosure may include, a non-linear energy detector that obtains baseband information from a mixed signal that corresponds to an information component of a received radio frequency (RF) signal, wherein the mixed signal comprises a local oscillator signal combined, without multiplication, with the received RF signal, wherein the received RF signal comprises a carrier wave component operating at a carrier frequency within a millimeter wave spectrum, wherein the non-linear energy detector is associated with a non-linear current-voltage (I-V) characteristic curve, and wherein the baseband information is obtained by applying the mixed signal to the non-linear I-V characteristic curve. Other embodiments are disclosed.