Bit Rate Compression for Signal Transmission in 5G Digital Front Ends
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Solution Overview
Problem
High oversampling in digital pre-distortion for 5G technology leads to increased power consumption due to high data bit rates at the interface between digital front end devices and converters in high occupied bandwidth environments.
Innovation Solution
The method involves separating an incoming signal into coarse and fine signals using a block floating point format, reducing bit rates and power consumption by alternating samples and sharing exponents, which are then combined to generate an approximation of the original signal, and transmitted over interfaces like JESD 204B/C, allowing for reduced bit rate transmission without significant degradation in signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high oversampling factor is used in digital pre-distortion, then in-band and out-of-band spurious components are reduced, but data bit rate increases causing increased power consumption
Solution Approach 1:
The patent divides the high-resolution signal into two separate streams: a coarse signal with lower resolution and a fine signal with higher resolution. This segmentation allows the system to transmit less data overall while maintaining signal quality, thereby reducing power consumption without sacrificing reliability.
Solution Approach 2:
The patent applies different quality levels to different parts of the signal representation. The coarse signal provides the fundamental signal structure with lower precision, while the fine signal adds localized high-precision corrections only where needed. This local quality approach reduces overall data transmission requirements while maintaining necessary signal fidelity.
2Productivity
If high occupied bandwidth and high modulation scheme are used, then data throughput increases, but power consumption increases
Solution Approach 1:
The patent transmits only the necessary portion of signal information by separating it into coarse and fine components. Instead of transmitting the full high-resolution signal continuously, the system transmits the coarse signal at full rate and the fine signal at a reduced rate, applying partial action to achieve the required data throughput with lower energy consumption.
3Measurement precision
If full precision signal transmission is maintained, then signal-to-noise ratio is preserved, but bit rate remains high increasing power consumption
Solution Approach 1:
The patent segments the precision requirements into two levels: the coarse signal carries the bulk of the signal information with moderate precision, while the fine signal provides the additional precision needed to maintain signal-to-noise ratio. This segmentation reduces the total quantity of data that must be transmitted while preserving measurement precision.
Solution Approach 2:
The patent creates a composite signal representation by combining coarse and fine signal streams. This composite approach allows the system to achieve full precision where needed while using lower precision elsewhere, effectively creating a hybrid transmission scheme that maintains signal-to-noise ratio with reduced overall bit rate.
Data Source
AI summary
Various antennas may benefit from improved signaling. For example, it may be helpful for a signal in a high occupied bandwidth environment to be compressed using a block floating point format, which can also help to reduce power consumption. A method may include separating an incoming signal at a digital front end or a converter into two alternating signals comprising a coarse signal and a fine signal. The method may also include transmitting the coarse signal and the fine signal from the digital front end to the converter or from the converter to the digital front end. The coarse signal and the fine signal may be combined to generate an approximation of the incoming signal.