Communication Device Out-of-Blocker Detection
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Solution Overview
Problem
Wireless communication receivers using frequency division duplexing (FDD) face signal-to-noise ratio (SNR) degradation due to interferences like transmitter leakage and out-of-band blockers, which can be mitigated by increasing power, but this leads to decreased efficiency.
Innovation Solution
A communication device with an antenna, transmission processor, and RF chain that detects out-of-band blockers by analyzing the peaked frequency spectrum of the received signal and adjusts the RF chain's reception characteristics to improve linearity, using a second transmission input signal with the same average power but greater amplitude than the first, to enhance SNR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power supplied to the receiver is increased to improve IP3 indicators, then linearity is improved, but efficiency decreases
Solution Approach 1:
The patent changes the amplitude parameter of the transmission input signal (increasing from first amplitude to second amplitude greater than first amplitude) while maintaining the same average power, thereby improving linearity without increasing power consumption. This parameter optimization resolves the contradiction between improving reliability and maintaining energy efficiency.
2Reliability
If power supplied to the receiver is increased to improve IP3 indicators, then signal to noise ratio is improved, but power consumption increases
Solution Approach 1:
The patent optimizes the signal amplitude parameter to achieve better SNR through improved linearity rather than increasing power. By adjusting the transmission input signal amplitude and detecting out-of-band blockers, the system achieves reliable communication with maintained power consumption levels.
3Measurement precision
If transmission input signal amplitude is increased to improve linearity, then out-of-band blocker detection is enhanced, but signal distortion may increase
Solution Approach 1:
The patent implements a feedback mechanism where the receiver detects out-of-band blockers by analyzing the frequency spectrum of received signals. This detection feedback allows the system to identify and compensate for blockers, improving measurement precision while maintaining signal integrity through adaptive adjustment.
Solution Approach 2:
The patent applies partial action by selectively increasing the amplitude of specific frequency components in the transmission input signal rather than uniformly increasing all signals. This targeted approach enhances blocker detection capability while minimizing the risk of overall signal distortion.
Data Source
AI summary
The present disclosure provides a communication device and an operating method. The communication device includes an antenna, a transmission processor, a radio frequency chain, and a reception processor. The transmission processor is configured to output a second transmission input signal with the same average power as the average power of a first transmission input signal and a second amplitude greater than a first amplitude of the first transmission input signal. The RF chain is configured to output an RF output signal to be transmitted through the antenna, based on a transmission input signal, and to output a reception input signal based on a signal received through the antenna. The reception processor is configured to check an out-of-band blocker by detecting a peaked frequency spectrum based on the reception input signal and to adjust a reception characteristic parameter of the RF chain based on an amplitude of the peaked frequency spectrum.