Cognition and Cooperation in Interfered Multiple Access Channels
In this work, we investigate a three-user cognitive communication network where a primary two-user multiple access channel suffers interference from a secondary point-to-point channel, sharing the same medium. While the point-to-point channel transmitter—transmitter 3—causes an interference at the p...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-07-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/19/7/378 |
| _version_ | 1811184402375376896 |
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| author | Jonathan Shimonovich Anelia Somekh-Baruch Shlomo Shamai (Shitz) |
| author_facet | Jonathan Shimonovich Anelia Somekh-Baruch Shlomo Shamai (Shitz) |
| author_sort | Jonathan Shimonovich |
| collection | DOAJ |
| description | In this work, we investigate a three-user cognitive communication network where a primary two-user multiple access channel suffers interference from a secondary point-to-point channel, sharing the same medium. While the point-to-point channel transmitter—transmitter 3—causes an interference at the primary multiple access channel receiver, we assume that the primary channel transmitters—transmitters 1 and 2—do not cause any interference at the point-to-point receiver. It is assumed that one of the multiple access channel transmitters has cognitive capabilities and cribs causally from the other multiple access channel transmitter. Furthermore, we assume that the cognitive transmitter knows the message of transmitter 3 in a non-causal manner, thus introducing the three-user multiple access cognitive Z-interference channel. We obtain inner and outer bounds on the capacity region of the this channel for both causal and strictly causal cribbing cognitive encoders. We further investigate different variations and aspects of the channel, referring to some previously studied cases. Attempting to better characterize the capacity region we look at the vertex points of the capacity region where each one of the transmitters tries to achieve its maximal rate. Moreover, we find the capacity region of a special case of a certain kind of more-capable multiple access cognitive Z-interference channels. In addition, we study the case of full unidirectional cooperation between the 2 multiple access channel encoders. Finally, since direct cribbing allows us full cognition in the case of continuous input alphabets, we study the case of partial cribbing, i.e., when the cribbing is performed via a deterministic function. |
| first_indexed | 2024-04-11T13:12:38Z |
| format | Article |
| id | doaj.art-7ac2f7069f9441338d66ea91a998b8d9 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-11T13:12:38Z |
| publishDate | 2017-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-7ac2f7069f9441338d66ea91a998b8d92022-12-22T04:22:33ZengMDPI AGEntropy1099-43002017-07-0119737810.3390/e19070378e19070378Cognition and Cooperation in Interfered Multiple Access ChannelsJonathan Shimonovich0Anelia Somekh-Baruch1Shlomo Shamai (Shitz)2Check Point Software Technologies Ltd., Tel Aviv 67897, IsraelFaculty of Engineering, Bar-Ilan University, Ramat-Gan 52900, IsraelElectrical Engineering Department, Technion, Haifa 32000, IsraelIn this work, we investigate a three-user cognitive communication network where a primary two-user multiple access channel suffers interference from a secondary point-to-point channel, sharing the same medium. While the point-to-point channel transmitter—transmitter 3—causes an interference at the primary multiple access channel receiver, we assume that the primary channel transmitters—transmitters 1 and 2—do not cause any interference at the point-to-point receiver. It is assumed that one of the multiple access channel transmitters has cognitive capabilities and cribs causally from the other multiple access channel transmitter. Furthermore, we assume that the cognitive transmitter knows the message of transmitter 3 in a non-causal manner, thus introducing the three-user multiple access cognitive Z-interference channel. We obtain inner and outer bounds on the capacity region of the this channel for both causal and strictly causal cribbing cognitive encoders. We further investigate different variations and aspects of the channel, referring to some previously studied cases. Attempting to better characterize the capacity region we look at the vertex points of the capacity region where each one of the transmitters tries to achieve its maximal rate. Moreover, we find the capacity region of a special case of a certain kind of more-capable multiple access cognitive Z-interference channels. In addition, we study the case of full unidirectional cooperation between the 2 multiple access channel encoders. Finally, since direct cribbing allows us full cognition in the case of continuous input alphabets, we study the case of partial cribbing, i.e., when the cribbing is performed via a deterministic function.https://www.mdpi.com/1099-4300/19/7/378cognitive radiomultiple access channelinterference channelcapacity regioncognitioncribbingcooperative communication |
| spellingShingle | Jonathan Shimonovich Anelia Somekh-Baruch Shlomo Shamai (Shitz) Cognition and Cooperation in Interfered Multiple Access Channels Entropy cognitive radio multiple access channel interference channel capacity region cognition cribbing cooperative communication |
| title | Cognition and Cooperation in Interfered Multiple Access Channels |
| title_full | Cognition and Cooperation in Interfered Multiple Access Channels |
| title_fullStr | Cognition and Cooperation in Interfered Multiple Access Channels |
| title_full_unstemmed | Cognition and Cooperation in Interfered Multiple Access Channels |
| title_short | Cognition and Cooperation in Interfered Multiple Access Channels |
| title_sort | cognition and cooperation in interfered multiple access channels |
| topic | cognitive radio multiple access channel interference channel capacity region cognition cribbing cooperative communication |
| url | https://www.mdpi.com/1099-4300/19/7/378 |
| work_keys_str_mv | AT jonathanshimonovich cognitionandcooperationininterferedmultipleaccesschannels AT aneliasomekhbaruch cognitionandcooperationininterferedmultipleaccesschannels AT shlomoshamaishitz cognitionandcooperationininterferedmultipleaccesschannels |