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A Physical Layer Network Coding Method Based on Continuous Phase Modulation

A technology of network coding and phase modulation, which is applied in the direction of forward error control, digital transmission system, and error prevention, and can solve problems such as no research reports.

Active Publication Date: 2021-07-23
ARMY ENG UNIV OF PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no research reports on the design and performance analysis of PNC detection schemes based on partial response CPM modulation.

Method used

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  • A Physical Layer Network Coding Method Based on Continuous Phase Modulation
  • A Physical Layer Network Coding Method Based on Continuous Phase Modulation
  • A Physical Layer Network Coding Method Based on Continuous Phase Modulation

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Embodiment Construction

[0040] The implementation of the present invention will be described in detail below, and the system model of the present invention will be introduced first.

[0041] 1. CPM signal model

[0042] Literature [15-16] gives the expression of CPM signal, among which literature [15] defines the conventional model of CPM signal, and literature [16] proposes the inclined phase model of CPM signal. Current research on CPM-PNC [9-13] Both are based on the regular phase of the CPM signal [15] , while the CPM signal involved in the present invention uses a tilted phase model [16] , where the modulation index h is a rational number, which can be expressed as h=K / P, and K and P are mutually prime positive integers.

[0043] For the M-ary CPM (M-CPM) signal, it is assumed that the input symbol sequence is u={u 0 ,u 1 ,,u n ,},u n ∈{0,1,,M-1}, u n is the symbol transmitted in each symbol period T, where u is the modified symbol sequence, and the input symbol sequence of the conventio...

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Abstract

A physical layer network coding method based on continuous phase modulation. In the physical layer network coding PNC, continuous phase modulation CPM is used. CPM includes full response and partial response. The CPM signal adopts a tilted phase model. The CPM signal is represented by a joint state grid diagram, and the Viterbi algorithm can be used to realize the joint detection of the two CPM signals according to the grid diagram. The present invention studies the physical layer network coding scheme based on the CPM modulation mode in the wireless two-way relay channel, which is applicable to the conventional CPM signal, and for the CPM signal with a specific form of modulation index, it can also greatly reduce the number of grid states of the superimposed signal, Thereby reducing the detection complexity.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to physical layer network coding (PNC) in wireless two-way relay communication, and is a physical layer network coding method based on continuous phase modulation. Background technique [0002] The wireless two-way relay channel is a typical transmission channel. In this scenario, two source nodes need to exchange information, but they are not within their respective communication coverage. Therefore, the information exchange needs to be completed with the help of the relay node. Reference [1] proposed the concept of Physical-layer Network Coding (PNC) based on Decode and Forward (DF) protocol. Its core idea is: the relay node uses the superposition characteristics of electromagnetic waves and adopts an appropriate mapping mechanism to map the received two source node information into the XOR information of the corresponding digital bit stream, and then broadcast it out. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0076
Inventor 沙楠高媛媛魏以民郭明喜陈丽花王世界刘笑辰宋慧颖张宇阳
Owner ARMY ENG UNIV OF PLA