Physical Layer Differential Network Coding for Two-way Relay Channels
- Creators
- Cui, Tao
- Gao, Feifei
- Tellambura, Chintha
Abstract
In this work, we consider differential modulation in two-way relay channels (TWRC). In single antenna systems, we propose non-coherent schemes for both amplify-and forward (AF) and decode-and-forward (DF) where the channel state information is not required. These new schemes are counterparts of the traditional non-coherent detection in point to point communications. The difficulty with differential modulation design in TWRC is that the received signal is a mixture of the signals from both source terminals. We derive maximum likelihood (ML) detectors for both AF and DF. The DF protocol can be considered as performing differential network coding at the physical layer. In addition, we propose several suboptimal alternatives including decision feedback and prediction based detectors. All these strategies work well as evidenced by simulation results. We also extend the schemes to the multiple-antenna case and provide design criterion of differential unitary space time modulation.
Additional Information
© 2008 IEEE. Issue Date: Nov. 30 2008-Dec. 4 2008; Date of Current Version: 08 December 2008.Attached Files
Published - Cui2008p13326Globecom_2007_2007_Ieee_Global_Telecommunications_Conference_Vols_1-11.pdf
Files
Name | Size | Download all |
---|---|---|
md5:6acbdfa170d5d149c8be1deae4e957f0
|
197.0 kB | Preview Download |
Additional details
- Eprint ID
- 23252
- Resolver ID
- CaltechAUTHORS:20110407-113423361
- Created
-
2011-04-10Created from EPrint's datestamp field
- Updated
-
2021-11-09Created from EPrint's last_modified field
- Series Name
- IEEE Global Telecommunications Conference (Globecom)
- Other Numbering System Name
- INSPEC Accession Number
- Other Numbering System Identifier
- 10414163