Implementation of a Channel Equalizer for OFDM Wireless LANs
RSP '04 Proceedings of the 15th IEEE International Workshop on Rapid System Prototyping
Challenges: a radically new architecture for next generation mobile ad hoc networks
Proceedings of the 11th annual international conference on Mobile computing and networking
Wireless innovation through software radios
ACM SIGCOMM Computer Communication Review
SMACK: a SMart ACKnowledgment scheme for broadcast messages in wireless networks
Proceedings of the ACM SIGCOMM 2009 conference on Data communication
Practical implementation of blind synchronization in NC-OFDM based cognitive radio networks
Proceedings of the 2010 ACM workshop on Cognitive radio networks
An architecture for software defined cognitive radio
Proceedings of the 6th ACM/IEEE Symposium on Architectures for Networking and Communications Systems
Channel assignment in virtual cut-through switching based wireless mesh networks
ICDCN'10 Proceedings of the 11th international conference on Distributed computing and networking
Secret agent radio: covert communication through dirty constellations
IH'12 Proceedings of the 14th international conference on Information Hiding
CODIPHY: composing on-demand intelligent physical layers
Proceedings of the second workshop on Software radio implementation forum
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In this paper, we present an intelligent physical layer for cognitive mesh networks. It is well recognized that wireless mesh networks suffer from the inherent property of per hop delay attributed to store and forward routing and channel contention. We show that an intelligent physical layer coupled with efficient traffic engineering and channel allocation mechanism will reduce latency. In this paper, we discuss the evolution of an OFDM receiver, with sufficient software control to aid reconfigurability, capable of receiving and decoding information on different set of subcarriers, and also capable of switching the incoming signals to a different part of the available spectrum on the fly. Equipped with this enhanced receiver we propose a mechanism for wireless worm-hole routing, which employs frequency domain switching between subchannels where each subchannel is defined by a set of subcarriers. The OFDM receiver handles three primitives: transmit, receive and relay rather than just transmit or receive. Instead of a contention based, store and forward routing, a relay oriented physical layer has been proposed to reduce latency. The processing pipeline at an intermediate node no longer involves higher layer processing, and the hardware relays the incoming signal on-the-fly to a different part of the spectrum allowing for a full duplex transmission as the transmitter can relay signals while it is receiving on a different subchannel.