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Polar code coding-based probabilistic shaping 4-PAM modulation system and modulation method thereof

A 4-PAM, modulation system technology, applied in error detection coding, using linear codes for error correction/detection, using block codes for error correction/detection, etc., can solve problems such as source sequence reduction

Active Publication Date: 2021-08-24
HUAQIAO UNIVERSITY
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Problems solved by technology

However, a small amount of redundant bits will be added through the BWDM algorithm process, resulting in a partial reduction of the source sequence

Method used

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  • Polar code coding-based probabilistic shaping 4-PAM modulation system and modulation method thereof
  • Polar code coding-based probabilistic shaping 4-PAM modulation system and modulation method thereof
  • Polar code coding-based probabilistic shaping 4-PAM modulation system and modulation method thereof

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Embodiment

[0053] Reference manual attached figure 1 , a probability shaping 4-PAM modulation system based on Polar code coding, including a signal generating device, a first signal shaping device, a Polar code encoder, a 4-PAM modulator, an AWGN channel, a demodulator, and a Polar code decoder and a second signal shaping device;

[0054] The signal generating device generates a random sequence of Bernoulli distribution, and then redistributes bit weights through the first signal shaping device, and then encodes through the Polar code encoder and modulates with a 4-PAM modulator. After modulation, After the signal is transmitted through the AWGN channel, the demodulator will demodulate the output symbol probability of the AWGN channel into a bit LLR, and the demodulated result will be decoded by the Polar code decoder and then passed The second signal shaping means restores the decoded bits to the original random sequence.

[0055] Reference manual attached figure 2 , the first signa...

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Abstract

The invention provides a Polar code encoding-based probabilistic shaping 4-PAM modulation system and a modulation method thereof. The system comprises a signal generation device, a first signal shaping device, a system Polar code encoder, a 4-PAM modulator, an AWGN channel, a demodulator, a system Polar code decoder and a second signal shaping device. The signal generating device generates a Bernoulli-distributed random sequence, then the Bernoulli-distributed random sequence is subjected to bit weight redistribution through the first signal shaping device, then the Bernoulli-distributed random sequence is coded through the system Polar code encoder, and the Bernoulli-distributed random sequence is modulated through the 4-PAM modulator; the modulated signal is transmitted through the AWGN channel, then the demodulator demodulates the probability of an output symbol of the AWGN channel into a bit LLR, and the demodulated result is decoded through the system Polar code decoder and then the decoded bit is recovered to an initial random sequence through the second signal shaping device.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular, to the technical field of communication with Polar code coding modulation. Background technique [0002] With the increase of users' demand for low-latency and high-reliability communications, the combination of Polar codes and high-order modulation has become an indispensable and practical solution. In the traditional Polar code coded modulation scheme, the channel input symbols are evenly distributed. But for AWGN channel, the optimal distribution of its channel input is Maxwell-Boltzmann (MB) distribution. Therefore, in order to solve this problem, a Polar coded modulation scheme based on Bit-Weighted Distribution Matching (BWDM) is proposed. The BWDM algorithm changes the weight of "0" in the source sequence by adding a small amount of redundant bits, and obtains the binary bit sequence with the target probability. Polar code is currently the only coding method...

Claims

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Application Information

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IPC IPC(8): H03M13/13H03M13/09
CPCH03M13/13H03M13/09
Inventor 周林王聪意石旭董泽陈辰陈启望
Owner HUAQIAO UNIVERSITY
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