Summary: 202 IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING, VOL. 2, NO. 2, APRIL 2008
Diversity Embedded Codes: Theory and Practice
Sanket Dusad, Suhas N. Diggavi, Member, IEEE, Naofal Al-Dhahir, Fellow, IEEE, and
A. R. Calderbank, Fellow, IEEE
Abstract--Diversity embedded codes are high-rate spacetime
codes that have a high-diversity code embedded within them.
They allow a form of communication where the high-rate code
opportunistically takes advantage of good channel realizations
while the embedded high-diversity code provides guarantees that
at least part of the information is received reliably. Over the past
few years, code designs and fundamental limits of performance
for such codes have been developed. In this paper, we review
these ideas by giving the developments in a unified framework.
In particular, we present both the coding technique as well as
information-theoretic bounds in the context of Intersymbol Inter-
ference (ISI) channels. We investigate the systems implications of
diversity embedded codes by examining value to network utility
maximization, unequal error protection for wireless transmission,
rate opportunism and packet delay optimization.
Index Terms--Opportunistic communication, rate diversity,