Channel quantization-based physical-layer network coding for two-way relay STBC system
Abstract Wireless multiple-input multiple-output (MIMO) two-way relay systems have received increasing attention recently. In a simple two-hop relay system, physical-layer network coding (PNC) is an effective scheme for relay to map the transmitted symbols from two terminal nodes into the network co...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
World Scientific Publishing
2017-09-01
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| Series: | Vietnam Journal of Computer Science |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s40595-017-0101-9 |
| Summary: | Abstract Wireless multiple-input multiple-output (MIMO) two-way relay systems have received increasing attention recently. In a simple two-hop relay system, physical-layer network coding (PNC) is an effective scheme for relay to map the transmitted symbols from two terminal nodes into the network coded symbol. This paper considers a two-hop two-way relay system which uses the Alamouti space-time code for signaling between all nodes and channel quantization for PNC mapping at the relay. Specifically, based on the concept of CQ-PNC we derive a PNC mapping rule for two pairs of network coded symbols. An adaptive mapping scheme based on minimum residual interference power is introduced to reduce the effect of quantization error. Finally, a relay selection method based on minimum residual interference power is proposed as a means to increase the system performance. |
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| ISSN: | 2196-8888 2196-8896 |