Method of Relay Node Partial Interference Elimination and Destination Node Received Signal Detection Based on fd-tpsr Network System
A relay node, interference cancellation technology, applied in transmission systems, duplex signal operations, radio transmission systems, etc., can solve the problems of signal-to-interference noise ratio reduction, error propagation, and processing delay increase, and achieve computational complexity. Low cost, low hardware cost, and simplified design effect
Active Publication Date: 2021-01-29
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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Problems solved by technology
Residual self-interference will lead to a decrease in the signal-to-interference-noise ratio and an increase in the bit error rate at the relay node and the destination node
Second, due to fundamental changes in the channel access mode of full-duplex relay nodes, the original IRI elimination method for half-duplex TPSR networks cannot be directly applied to FD-TPSR networks
Although theoretically the bit error rate of the MMSE-DFE method can approach the performance of ML detection at a high SNR, it will be affected by the detection sequence. If the detection sequence is improper, the decision feedback equalizer will cause errors when performing serial interference elimination. spread, leading to a rapid deterioration in detection performance
In addition, due to the use of symbol-by-symbol decision feedback, the destination node must start the detection process after receiving all the source node signals, resulting in increased processing delay, making it difficult to meet the end-to-end delay requirements
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[0075] The specific implementation manner and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0076] from figure 1 It can be seen that a FD-TPSR network system includes a half-duplex source node S, a first full-duplex relay node R1, a second full-duplex relay node R2, and a half-duplex destination node D; the half-duplex The duplex source node S is wirelessly connected to the first full-duplex relay node R1 and the second full-duplex relay node R2 respectively; the first full-duplex relay node R1 and the second full-duplex relay node Wireless connection between nodes R2, the first full-duplex relay node R1 and the second full-duplex relay node R2 are respectively wirelessly connected to the half-duplex destination node D;
[0077] The half-duplex source node S is provided with a channel coding module and a binary phase-shift keying modulation module; the coding scheme of the channel coding m...
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The invention discloses a method for eliminating partial interference of a relay node and detecting a signal received by a destination node based on an FD-TPSR network system, including a half-duplex source node, a first full-duplex relay node, and a second full-duplex relay node and a half-duplex destination node; the source node is wirelessly connected to the first full-duplex relay node and the second full-duplex relay node; the connection between the first full-duplex relay node and the second full-duplex relay node The first full-duplex relay node and the second full-duplex relay node are wirelessly connected to the destination node respectively; the source node is provided with a channel coding module and a binary phase-shift keying modulation module; the relay nodes are provided with A full-duplex communication module, an amplification and forwarding module, a channel state information acquisition module, a network synchronization module, and an orthogonal transmission module; the destination node is provided with a channel state information acquisition module, a matched filter module, and a parallel interference elimination module.
Description
technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for eliminating partial interference of a relay node and detecting a signal received by a destination node based on an FD-TPSR network system. Background technique [0002] Relay network is one of the alternative implementations of multiple international standards for wireless communication, which can effectively expand the coverage of communication nodes and improve the quality of wireless links. However, in a traditional wireless relay network, the relay node works in Half-Duplex (HD) mode, and needs to use orthogonal time-frequency resources when receiving and forwarding the source node signal, resulting in loss of spectral efficiency. [0003] Based on the upper bound of the transmission performance of the half-duplex relay network derived by Khojastepour et al., the industry designed a diamond relay (Diamond Relaying) network structure, which consists...
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IPC IPC(8): H04B7/155H04L5/14
CPCH04B7/155H04B7/15585H04L5/14
Inventor韦磊赵永生郭雅娟汪玉成许海清刘柱朱道华秦浩李温静孙云晓吴庆吕玉祥李岩周超杨阳姜海涛王兴涛刘智威郭静李帅
OwnerSTATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST