Method for solving soft information in 16APSK high-order modulation mode

Abstract

The invention provides a method for solving soft information in a 16APSK high-order modulation mode, and aims to realize efficient decoding in the 16APSK modulation mode and fully improve the utilization rate of a frequency spectrum. The method is implemented through the technical scheme that the method comprises the steps: evenly distributing constellation diagrams in a 16APSK modulation mode in coordinate system planes of different areas, carrying out mean value estimation according to 16APSK demodulation signals, solving soft information in the different areas, and completing the frame synchronization; calculating a boundary threshold value of an inner ring and an outer ring formed by concentric circles of a unit coordinate system of a constellation diagram region division diagram according to a statistical value, and demodulating a demodulation signal belonging to a certain region in 16 different regions in the constellation diagram; calculating the soft output demodulation information of a high-order modulation 16APSK signal, carrying out the LDPC decoding in combination with a density parity check code LDPC high-speed decoding mode, verifying the code words received by a receiving end through a corresponding supervision relation, and finding and correcting the errors introduced in transmission, so the LDPC decoding of mass data transmission in the 16APSK modulation mode is achieved.

Description

technical field [0001] The invention relates to the technical field of demodulation and decoding in digital communication, and relates to a method for solving soft information in a 16APSK high-order modulation mode. Background technique [0002] With the rapid development of satellite communication systems, the demand for massive data transmission is getting higher and higher. Due to the limited available frequency band resources of the satellite transmission channel, in the face of such a huge amount of information transmission demand, the utilization rate of the spectrum needs to be greatly improved. Since the satellite channel is not only a channel with limited bandwidth and power, but also a nonlinear channel, it needs to have a modulation method with a relatively concentrated power spectral density of the modulated carrier, so the constant envelope modulation is usually used. However, as the demand for wireless communication continues to grow, frequency resources becom...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of solving the high complexity of soft information in the existing 16APSK high-order modulation mode, the present invention proposes a reliable mass data transmission, which can reduce computational complexity, improve spectrum utilization, and significantly reduce the hardware resources required for 16APSK to solve soft information. , and the decoding performance meets the actual needs of high-speed digital transmission under the 16APSK high-order modulation method to solve the soft information

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