Accession Number : ADA534155


Title :   Ultra-Wideband Impulse Radio for Tactical Ad-Hoc Military Communications


Descriptive Note : Final rept. 15 May 2007-14 May 2010


Corporate Author : NORTH CAROLINA STATE UNIV AT RALEIGH DEPT OF ELECTRICAL AND COMPUTER ENGINEERING


Personal Author(s) : Townsend, J K ; Li, Liping


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a534155.pdf


Report Date : 02 Sep 2010


Pagination or Media Count : 12


Abstract : The simple ultra-wideband (UWB) communications receiver structure is especially attractive to applications which require low cost and low power consumption. However, the envisioned simple receiver designs are also fraught with challenges Transmitted Reference (TR) UWB systems have been proposed in the literature as one way to avoid channel estimation while still maintaining a relatively simple receiver structure. In this project, we investigated the performance of TR UWB communication systems in multiple-access environments. We remove the commonly invoked assumption of perfect power control. We investigate the multiple access interference (MAI) of TR UWB systems, as well as frequency-shifted reference (FSR) UWB systems. In this project, we propose and investigate a synchronization procedure which is near-far resistant. By exploiting the structure of interfering power levels, we devise an efficient suppression technique which only requires the knowledge of the spreading code of the desired user. Complex matrix operations required by other techniques found in the CDMA literature are not required in our suppression process. Simulation results validate our proposed near-far resistant synchronization technique and the superior performance is shown when compared to the current literature.


Descriptors :   *MULTICHANNEL COMMUNICATIONS , *TACTICAL COMMUNICATIONS , *BROADBAND , RECEIVERS , ELECTROMAGNETIC INTERFERENCE , CODE DIVISION MULTIPLE ACCESS , RADIO EQUIPMENT , BROADBAND ANTENNAS , MULTIPLE ACCESS , PULSES , COMMUNICATION EQUIPMENT , POWER LEVELS , COMMUNICATION AND RADIO SYSTEMS


Subject Categories : Electrical and Electronic Equipment
      Numerical Mathematics
      Military Operations, Strategy and Tactics
      Electricity and Magnetism
      Radiofrequency Wave Propagation
      Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE