I/Q Signal Quantization for Wireless Communication Distortion
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Solution Overview
Problem
Current methods for compressing in-phase/quadrature (I/Q) signals in wireless communication systems result in signal distortion and reduced communication efficiency due to direct bit width compression, leading to loss of signal integrity.
Innovation Solution
The method involves calculating amplitude and phase values of I/Q signals, determining quantization levels, and quantizing these values to reduce bit width, then transmitting the quantized values along with the quantization levels, allowing the receiving end to accurately recover the original signal by reversing the quantization process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If direct bit width compression is applied to I/Q signals, then communication efficiency is improved by reducing bit width, but signal distortion occurs and communication efficiency deteriorates due to loss of signal integrity
Solution Approach 1:
The patent transforms the I/Q signal representation from time-domain samples to frequency-domain parameters (amplitude and phase). By changing the parameter domain, the signal can be compressed to fewer bits while preserving essential signal characteristics, thus resolving the contradiction between bit width reduction and signal integrity maintenance
Solution Approach 2:
The patent extracts only the essential parameters (amplitude and phase) from the complete I/Q signal representation. By taking out only the critical information needed for signal reconstruction, the bit width is reduced while maintaining signal integrity, avoiding the distortion that occurs with direct compression
2Quantity of substance
If I/Q signal is compressed from 8 bits to 5 bits, then transmission bandwidth is reduced, but three bits of signal information cannot be correctly recovered causing distortion
Solution Approach 1:
The patent changes the representation parameters from time-domain I/Q samples to frequency-domain amplitude and phase parameters. This parameter transformation enables accurate signal recovery from fewer bits because amplitude and phase are the fundamental characteristics that define the signal, allowing 5-bit representation to preserve essential information that would be lost in direct compression
Data Source
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AI summary
Embodiments of the present invention relate to the communications field, and provide an I/Q signal transmission method and system, and an apparatus, so as to mitigate a problem of signal distortion in a wireless communication process to an extent, and increase communication efficiency of a radio device. The method includes: calculating, by a sending end, a first amplitude value and a first phase value of a first I/Q signal; obtaining, by the sending end, an amplitude quantization level of the first amplitude value and a phase quantization level of the first phase value, where the amplitude quantization level is used to indicate an amplitude value transmitted per unit of bit width, and the phase quantization level is used to indicate a phase value transmitted per unit of bit width; quantizing, by the sending end, the first amplitude value according to the amplitude quantization level, to obtain a second amplitude value after the quantization, and quantizing the first phase value according to the phase quantization level, to obtain a second phase value after the quantization; and transmitting, by the sending end, the second amplitude value, the second phase value, the amplitude quantization level, and the phase quantization level to a receiving end.