Accession Number : ADA516004


Title :   Spectrally-Temporally Adapted Spectrally Modulated Spectrally Encoded (SMSE) Waveform Design for Coexistent CR-Based SDR Applications


Descriptive Note : Doctoral thesis


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Like, Eric C.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA516004


Report Date : MAR 2010


Pagination or Media Count : 208


Abstract : This work expands the applicability of the Spectrally Modulated, Spectrally Encoded (SMSE) framework by developing a waveform optimization process that enables intelligent waveform design. The resultant waveforms are capable of adapting to a spectrally diverse transmission channel while meeting coexistent constraints. SMSE waveform design is investigated with respect to two different forms of coexisting signal constraints, including those based on resultant interference levels and those based on resultant power spectrum shape. As demonstrated, the SMSE framework is well-suited for waveform optimization given its ability to allow independent design of spectral parameters. This utility is greatly enhanced when soft decision selection and dynamic assignment of SMSE design parameters are incorporated. Results show that by exploiting statistical knowledge of primary user spectral and temporal behavior, the inherent flexibility of the SMSE framework is effectively leveraged such that SMSE throughput (Bits/Sec) is maximized while limiting mutual coexistent interference to manageable levels.


Descriptors :   *POWER SPECTRA , *RADIO TRANSMITTERS , *FREQUENCY DIVISION MULTIPLEXING , *WAVEFORMS , THESES , ORTHOGONALITY , INTERFERENCE , ALLOCATIONS , CHANNELS , COGNITION , DYNAMICS , OPTIMIZATION


Subject Categories : OPTICS
      RADIOFREQUENCY WAVE PROPAGATION
      RADIO COMMUNICATIONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE