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A high-order modulation signal transmission control method suitable for nonlinear interference

A high-order modulation and signal transmission technology, applied in the field of mobile communication, can solve the problem of high complexity, achieve the effect of reducing complexity, reducing nonlinear interference, and improving performance

Active Publication Date: 2021-09-07
SOUTHEAST UNIV
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Problems solved by technology

Different from the pre-distortion compensation technology, the post-distortion compensation technology uses a specific demodulation algorithm at the receiving end of the communication system to eliminate the nonlinear interference to the signal as much as possible. The current post-distortion compensation technology is highly complex

Method used

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  • A high-order modulation signal transmission control method suitable for nonlinear interference
  • A high-order modulation signal transmission control method suitable for nonlinear interference
  • A high-order modulation signal transmission control method suitable for nonlinear interference

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] The present invention designs a high-order modulation signal transmission control method suitable for nonlinear interference, which is used for binary bit stream X{x 1 ,x 2 ,...,x N}, realize the transmission control from the transmitter to the receiver; such as figure 1 As shown, the following steps A to E are included.

[0035] Step A. According to the modulation order M at the transmitting end, press m=log 2 M, get the number m of bits in a single QAM signal, and press Obtain the number of groups K, and then enter step B; where, Indicates rounding up, and N indicates the number of bits in the binary bit stream X.

[0036] Step B. The transmitting end takes the number of bits in a single QAM signal as m, applies the constellation mapping method, and sequentially groups each bit in the binary bit stream X...

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Abstract

The invention relates to a high-order modulated signal transmission control method suitable for nonlinear interference. The demodulation function is realized through a neural network to reduce the nonlinear interference caused by the power amplifier to the signal, thereby restoring the signal at the transmitting end, wherein, The cost function of the neural network adopts the cross entropy function; the training method adopts the backpropagation algorithm; the real part, the imaginary part and the corresponding power back-off coefficient of the signal after the matched filter are used as the input of the neural network, and the output of the neural network is represents QAM Each bit in the signal is a probability value of 1; and the activation functions of the hidden layer and the output layer of the neural network are respectively adopted tanh function and sigmoid function; compared with the demodulation algorithm of the existing high-order modulation signal in the nonlinear scene, the whole design scheme not only improves the performance, but also reduces the complexity of the algorithm.

Description

technical field [0001] The invention relates to a high-order modulation signal transmission control method suitable for nonlinear interference, which belongs to the technical field of mobile communication. Background technique [0002] With the continuous increase of the number of mobile users, people's demand for communication technology becomes higher and higher. In the past 40 years or so, the mobile communication system has developed from the first generation mobile communication system (1G) in the 1970s to the fifth generation mobile communication system (5G) that is currently widely concerned. At present, the industry's research on 5G wireless access technology mainly focuses on three major application scenarios of 5G: enhanced mobile broadband (eMBB), massive mobile communication (mMTC), and ultra-reliable low-latency communication (URLLC). Mobile broadband is a comprehensive enhancement of the current 4G data transmission rate, delay, and user capacity. Massive mode...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/34H04B17/391G06N3/08
CPCG06N3/084H04L27/3405H04B17/391
Inventor 姜明邹龙浩赵春明
Owner SOUTHEAST UNIV
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