CDMA-based analog network coding through interference cancellation for underwater acoustic sensor networks

Authors:
Hovannes Kulhandjian;Tommaso Melodia;Dimitrios Koutsonikolas
Affiliations:
State University of New York at Buffalo, New York;State University of New York at Buffalo, New York;State University of New York at Buffalo, New York
Venue:
Proceedings of the Seventh ACM International Conference on Underwater Networks and Systems
Year:
2012

Citing 8
Cited 1

XORs in the air: practical wireless network coding

Proceedings of the 2006 conference on Applications, technologies, architectures, and protocols for computer communications
Hot topic: physical-layer network coding

Proceedings of the 12th annual international conference on Mobile computing and networking
Embracing wireless interference: analog network coding

Proceedings of the 2007 conference on Applications, technologies, architectures, and protocols for computer communications
Implicit hop-by-hop congestion control in wireless multihop networks

Ad Hoc Networks
Overlapped Carrier-Sense Multiple Access (OCSMA) in Wireless Ad Hoc Networks

IEEE Transactions on Mobile Computing
A CDMA-based medium access control for underwater acoustic sensor networks

IEEE Transactions on Wireless Communications
Cooperative protocol for analog network coding in distributed wireless networks

IEEE Transactions on Wireless Communications
Adaptive maximum SINR RAKE filtering for DS-CDMA multipath fading channels

IEEE Journal on Selected Areas in Communications

A hybrid MAC protocol with channel-dependent optimized scheduling for clustered underwater acoustic sensor networks

Proceedings of the Eighth ACM International Conference on Underwater Networks and Systems

Quantified Score

Hi-index	0.00

Visualization

Abstract

The performance of multi-hop underwater acoustic network is known to be limited by the long propagation delays and by the limited bandwidth of the underwater acoustic (UW-A) channel. Recent work on analog network coding (ANC) has shown that significant throughput gains can be achieved in multi-hop wireless networks. However, implementing ANC for UW-A communications is very challenging as the UW-A channel is severely affected by multipath. In this paper, we propose CE-CDMA, a collision-enabling direct-sequence code-division multiple-access scheme for multi-hop underwater acoustic sensor networks (UW-ASNs). In CE-CDMA two nodes, separated by two hops, are assigned the same code-division channel (i.e., spreading code) to communicate concurrently. The transmission of packets by the two nodes will therefore collide at the intermediate (relay) node. However, we show that by exploiting a priori information, i.e., the interfered packet previously received from one of the nodes, and an adaptive RAKE receiver that jointly estimates the two multipath-affected channels, the relay node can cancel the interference before decoding the packet of interest. Experiments demonstrate that for a 1--2dB tradeoff in signal-to-noise ratio (SNR) the proposed scheme can potentially improve the channel utilization of a unidirectional multi-hop linear network by up to 50%. We also outline the basic functionalities of a MAC protocol (CE-MAC) designed to support the proposed scheme.