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Physical layer network coding method based on continuous phase modulation

A network coding and phase modulation technology, applied in the field of physical layer network coding based on continuous phase modulation, can solve problems such as no research reports, and achieve the effect of good applicability

Active Publication Date: 2019-04-23
ARMY ENG UNIV OF PLA
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  • 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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  • Physical layer network coding method based on continuous phase modulation
  • Physical layer network coding method based on continuous phase modulation
  • 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 convent...

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Abstract

The invention discloses a physical layer network coding method based on continuous phase modulation. Continuous phase modulation CPM is adopted in a physical layer network coding PNC; the CPM comprises full response and partial response, a CPM signal adopts an inclined phase model; in a relay channel, two paths of overlapped CPM signals are represented by using a grid chart in a joint state, and the joint detection on two paths of CPM signals can be realized by adopting a Viterbi algorithm according to the grid chart. The invention researches a physical layer network coding scheme based on theCPM modulation way in the wireless bidirectional relay channel, the scheme is suitable for the conventional CPM signal, the grid state number of the overlapped signal can be greatly reduced for the CPM signal with the modulation index in a specific way, 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 Applications(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