NICOP - Fast Transmission of Analog Information over Wireless Networks
Abstract
The design of efficient transmission schemes to reliably communicate information at high rates and with very low delay represents an outstanding challenge in wireless communications and multiuser scenarios. This topic is of great value for communication systems for Defense because the exchange of critical information between the surveillance/attack nodes and the coordination base can be vital to save human lives or overtake the enemy in the battlefield. In this context, the joint optimization of the encoding operations that transforms the source data into adequate channel symbols to be transmitted over wireless channels arises as an useful and effective alternative to improve the quality of the communication process. Since most of the typical information of interest for Defense purposes -such as parameter values, sounds, images or video- is originally described by analog signals, continuous Joint Source Channel Coding (JSCC) mappings can be considered to directly transform the analog source symbols into the associated coded symbols that are transmitted over a given channel. Communication systems using this type of analog JSCC mappings have a series of desirables properties such as high data rates, low delay, low power consumption, ease of adaptation to time-varying environments and graceful degradation for imprecise knowledge of the channel at transmission. These properties make analog JSCC schemes specially attractive for wireless communication of large amounts of data in hostile situations while preserving the autonomy of the transmission devices. For that reason, this research proposal focuses on the analysis, design and implementation of different analog JSCC schemes for multinode and network communications. In particular, the application of analog JSCC techniques is meticulously considered for one node-tomultinode and multinode-to-one node scenarios. The combination of analog JSCC and traditional digital transmissions is also addressed in order to construct suitable Hybrid-Digital Analog (HDA) systems for the aforementioned scenarios. In addition, the incorporation of intermediate nodes that retransmit the original information is considered for those cases where the distance between the transmit and receive nodes is very large. The results from this investigation may be relevant for ONRG purposes in the Command, Control, Computers and Communication Technology Area because the analog JSCC HDA systems developed in this research project will improve the quality of the communication between the surveillance/attack units and the base station, to achieve a better exploitation of the available power and to lengthen the autonomy of the transmission devices integrated on mobile units. Over the last years, we have collaborated with Javier Garc´?a Fr´?as on the research related to analog JSCC. Javier Garc´?a Fr´?as is Professor in the Department of Electrical and Computer Engineering, University of Delaware, and he has extensive experience in the main aspects of this proposal, such as signal processing, communication theory and JSCC As result of the research effort, different papers and technical works are expected to be published in relevant international conference, workshops and technical journals in the areas of communication and signal processing. Additionally, practical and functional implementations of the different analog JSCC models developed throughout this research will be carried out in order to experimentally corroborate the results obtained in the theoretical stages.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N629091512014
Entities
People
- Luis Castedo
Organizations
- Office of Naval Research
- United States Navy
- University of A Coruña