There has recently been growing interest in using physical layer network coding
techniques to facilitate information transfer in wireless relay networks. The physical
layer network coding technique takes advantage of the additive nature of wireless
signals by allowing two terminals to transmit simultaneously to the relay node.
This technique has several performance benefits, such as improving utilization and
throughput of wireless channels and reducing delay.
In this thesis, we present an algorithm for joint decoding of two unsynchronized
transmitters to a modulo-2 sum of their transmitted messages. We address the problems
that arise when the boundaries of the signals do not align with each other and
when their phases are not identical. Our approach uses a state-based Viterbi decoding
scheme that takes into account the timing offsets between the interfering signals. As a
future research plan, we plan to utilize software-defined radios (SDRs) as a testbed to
show the practicality of our approach and to verify its performance. Our simulation
studies show that the decoder performs well with the only degrading factor being the
noise level in the channel.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/ETD-TAMU-2009-08-7194 |
| Date | 2009 August 1900 |
| Creators | Maduike, Dumezie K. |
| Contributors | Sprintson, Alex, Pfister, Henry |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | application/pdf |
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