Computer Science – Information Theory
Scientific paper
2009-01-15
Computer Science
Information Theory
Scientific paper
This paper deals with superposition coding for cooperative broadcasting in the case of two coordinated source nodes, as introduced in the seminal work of Bergmans and Cover in 1974. A scheme is introduced for two classes of destination (or relay) nodes: Close nodes and far nodes, as ranked by their spatial distances to the pair of transmitting nodes. Two linear codes are combined using the (u,u+v)-construction devised by Plotkin to construct two-level linear unequal error protection (LUEP) codes. However, instead of binary addition of subcode codewords in the source encoder, here modulated subcode sequences are combined at the destination (or relay) nodes antennae. Bergmans and Cover referred to this as over-the-air mixing. In the case of Rayleigh fading, additional diversity order as well as robustness to channel estimation errors are obtained when source nodes transmit pairs of coded sequences in accordance to Alamouti's transmit diversity scheme. We refer to this combination as a Plotkin-Alamouti scheme and study its performance over AWGN and Rayleigh fading channels with a properly partitioned QPSK constellation.
No associations
LandOfFree
A Plotkin-Alamouti Superposition Coding Scheme for Cooperative Broadcasting in Wireless Networks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Plotkin-Alamouti Superposition Coding Scheme for Cooperative Broadcasting in Wireless Networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Plotkin-Alamouti Superposition Coding Scheme for Cooperative Broadcasting in Wireless Networks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-590132