TY - JOUR
T1 - Diversity Gain Analysis of Distributed CDD Systems in Non-Identical Fading Channels
AU - Kim, Kyeong Jin
AU - Liu, Hongwu
AU - Ding, Zhiguo
AU - Orlik, Philip V.
AU - Poor, H. Vincent
N1 - Funding Information:
Manuscript received April 27, 2020; revised July 5, 2020; accepted July 11, 2020. Date of publication July 21, 2020; date of current version November 18, 2020. This work was supported in part by the U.S. National Science Foundation under Grants CCF-0939370 and CCF-1513915 and in part by the Natural Science Foundation of Guangdong Province in China under Grant 2018B030306005. This article was presented in part at the 2018 IEEE International Conference on Communications. The associate editor coordinating the review of this article and approving it for publication was E. K. S. Au. (Corresponding author: Kyeong Jin Kim.) Kyeong Jin Kim and Philip V. Orlik are with the Mitsubishi Electric Research Laboratories (MERL), Cambridge, MA 02139 USA (e-mail: [email protected]; [email protected]).
Publisher Copyright:
© 1972-2012 IEEE.
PY - 2020/11
Y1 - 2020/11
N2 - This paper investigates the diversity gain of a distributed cyclic delay diversity (dCDD) scheme for cyclic-prefixed single carrier systems in non-identical fading channels. Non-identical small-scale fading is assumed in the environment, in which non-identical line-of-sight and non-line-of-sight fading coexist. A condition for dCDD resulting in intersymbol interference free reception at the receiver, is extended to this new channel environment. For an overpopulated system setup, a generalized performance analysis, is not available from existing works, is conducted after developing closed-form expressions for the distribution of the signal-to-noise ratio (SNR) realized at the receiver. Since the order statistics are involved in the statistical properties of the SNR, the corresponding spacing statistics are utilized to derive feasible closed-form expressions. The finalized closed-form expressions are shown to provide very reliable outage probability and spectral efficiency of dCDD for underpopulated and overpopulated systems. An asymptotic performance analysis verifies the maximum achievable diversity of the dCDD even in the overpopulated case within the considered channel environment. Link-level simulations are conducted and these verify the maximum achievable diversity gain.
AB - This paper investigates the diversity gain of a distributed cyclic delay diversity (dCDD) scheme for cyclic-prefixed single carrier systems in non-identical fading channels. Non-identical small-scale fading is assumed in the environment, in which non-identical line-of-sight and non-line-of-sight fading coexist. A condition for dCDD resulting in intersymbol interference free reception at the receiver, is extended to this new channel environment. For an overpopulated system setup, a generalized performance analysis, is not available from existing works, is conducted after developing closed-form expressions for the distribution of the signal-to-noise ratio (SNR) realized at the receiver. Since the order statistics are involved in the statistical properties of the SNR, the corresponding spacing statistics are utilized to derive feasible closed-form expressions. The finalized closed-form expressions are shown to provide very reliable outage probability and spectral efficiency of dCDD for underpopulated and overpopulated systems. An asymptotic performance analysis verifies the maximum achievable diversity of the dCDD even in the overpopulated case within the considered channel environment. Link-level simulations are conducted and these verify the maximum achievable diversity gain.
KW - coexisting line-of-sight and non-line-of-sight paths
KW - cyclic delay diversity
KW - Distributed single carrier system
KW - diversity gain
KW - non-identical frequency selective fading
UR - http://www.scopus.com/inward/record.url?scp=85096643939&partnerID=8YFLogxK
U2 - 10.1109/TCOMM.2020.3010995
DO - 10.1109/TCOMM.2020.3010995
M3 - Article
AN - SCOPUS:85096643939
SN - 0090-6778
VL - 68
SP - 7218
EP - 7231
JO - IEEE Transactions on Communications
JF - IEEE Transactions on Communications
IS - 11
M1 - 9145732
ER -