Accession Number:

ADA528782

Title:

Many-to-Many Communications via Space-Time Network Coding (PREPRINT)

Descriptive Note:

Conference paper preprint

Corporate Author:

ARMY RESEARCH DEVELOPMENT AND ENGINEERING COMMAND ABERDEEN PROVING GROUND MD

Report Date:

2010-01-01

Pagination or Media Count:

7.0

Abstract:

In this paper, the mutual cooperative communication between multiple nodes in a wireless network is efficiently achieved through a novel concept of Space-Time Network Coding STNC. Unlike the conventional point-to-point cooperative communications between two nodes with N relay nodes deployed in between, simultaneous transmissions from the different N nodes acting as sourcerelay nodes are performed within 2N time-slots. In particular, the communication is split into two phases 1 Broadcasting Phase and 2 Cooperation Phase. In the Broadcasting Phase, each node broadcasts its data symbol to the other nodes in the network in its own time-slot, alternatively while in the Cooperation Phase, in each time-slot, a set of N-1 nodes transmit while a single destination node receives the other nodes transmissions. Specifically, each node employing a selective Decode-and-Forward DF cooperative protocol, performs a linear combination of the other nodes data symbols and all the N-1 nodes simultaneously transmit their signals to a single receiving node which then performs joint multiuser detection to separate the different nodes symbols. Exact symbol-error-rate SER expressions for arbitrary order M-ary Phase Shift Keying M-PSK modulation are derived. In addition, an asymptotic SER approximation is also provided which is shown to be tight at high signal-to-noise ratio SNR. Finally, the analytical results confirm that for a network of N nodes, a full diversity order of N-1 per node is achieved by the proposed STNC cooperative communication scheme.

Subject Categories:

  • Computer Programming and Software
  • Computer Systems Management and Standards
  • Miscellaneous Detection and Detectors
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE