A signal-time coding approach to relay networks

Pingyi Fan, Khaled Ben Letaief

Research output: Contribution to conferencePaper

Abstract

In this paper, we first investigate the network information flow over a relay network topology and find that the reliable achievable information rate is beyond the achievable upper bound using the conventional encoding/modualtion techniques when the relay and the destination are with carrier sensing. We then propose a signal-time coding approach which combines the traditional encoding/modulation mode in the signal domain with the signal pulse phase modulation in time domain. Such a hybrid signal-time coding approach can be considered as an integrated codec/modem processing in the two dimensional combinatorial space: Signal domain and temporal domain. The main feature of the proposed signal-time coding is that one can separately design the codec/modem in the signal domain and in the time domain. Therefore, the well known efficient codec/modems, such as LDPC, Turbo coding, TCM etc. in the signal domain can be employed here. A tight lower bound is explicitly presented for the signal phase coding/modulation efficiency in the time domain. In addition, we also present an iterative method to construct the code book for the signal phase coding/modulation in the time domain. Finally, consider its applications in the additive white Gaussian noisy (AWGN) relay networks and obtain some interesting results.

Original languageEnglish
Pages412-419
Number of pages8
DOIs
Publication statusPublished - 1 Dec 2009
Event5th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2009 - Fujian Province, China
Duration: 14 Dec 200916 Dec 2009

Other

Other5th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2009
CountryChina
CityFujian Province
Period14/12/0916/12/09

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Keywords

  • Max-flow min-cut
  • Network information flow
  • Network information theory
  • Rate splitting
  • Signal-time coding

ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

Fan, P., & Letaief, K. B. (2009). A signal-time coding approach to relay networks. 412-419. Paper presented at 5th International Conference on Mobile Ad-hoc and Sensor Networks, MSN 2009, Fujian Province, China. https://doi.org/10.1109/MSN.2009.67