2026-09-20T16:53:03Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/81314 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Hajek, Bruce Subramanian, Vijay Gautam 2015-09-25T20:10:31Z 2015-09-25T20:10:31Z 10000-01-01 1999 1999 The general wide-sense stationary and uncorrelated scattering (WSSUS) fading channel has a similar behavior in that the capacity per unit energy equals the capacity per unit energy of the AWGN channel with the same signal-to-noise ratio. The fourth-moment cost is generalized to a fourth-order functional called fourthegy which depends on the square of the signal ambiguity function. The capacity per unit fourthegy for WSSUS channels is identified and is finite and nonzero. It follows that signals with small values of fourthegy per unit energy are able to communicate only a small number of bits per unit energy. It shown in this thesis that for wideband fading channels the nonbursty direct-sequence spread spectrum signals have small values of fourthegy per unit energy; therefore, such signals can only achieve small rates of reliable information transfer. This result holds in general for diffuse WSSUS fading channels as well as specular WSSUS fading channels with many multipath components. The accompanying reliability function per unit energy and reliability function per unit fourthegy are also derived. Made available in DSpace on 2015-09-25T20:10:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 9953150.pdf: 4208527 bytes, checksum: 90600ccf4d6e6532e16308872d0da922 (MD5) Previous issue date: 1999 Embargo set by: Seth Robbins for item 82595 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 90 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1999. http://hdl.handle.net/2142/81314 (MiAaPQ)AAI9953150 eng Engineering, Electronics and Electrical Broadband Fading Channels: Signal Burstiness and Capacity text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.