TY - JOUR

T1 - An approach to the second-order statistics of maximum-ratio combining-like reception over independent Nakagami channels

AU - Lin, Jia Chin

N1 - Funding Information:
Manuscript received March 24, 2011; revised September 8, 2011 and November 1, 2011; accepted December 13, 2011. Date of publication December 21, 2011; date of current version February 21, 2012. This work was supported in part by the National Science Council, Taiwan, under Contract NSC 100-2221-E-008-049-MY3. The review of this paper was coordinated by Prof. X. Wang.

PY - 2012/2

Y1 - 2012/2

N2 - A statistical approach facilitating performance assessment in maximum-ratio combining (MRC)-like reception over independent nonidentically distributed (INID) Nakagami-m fading channels was investigated. Using the proposed method, generalized simple closed-form second-order statistics, i.e., level-crossing rate (LCR) and average fade duration (AFD), can be readily formulated. These second-order statistics can be classified as generalized because multiple (i.e., not limited to two) identically or nonidentically distributed diversity branches can be incorporated. These closed formulations can be accurately applied in various practical environments where nonidentically distributed branches are presented, e.g., single-user single-input-multiple-output (SU-SIMO) applications, relay networks, and macrodiversity reception in wideband code-division multiple access (W-CDMA) communications. The analytic formulations derived in this work were comprehensively verified in computer simulations. The derived closed forms were also carefully verified by comparison with those obtained using the true MRC in the degenerate scenarios, i.e., those in which only two diversity branches exist or where identically distributed diversity branches can be assumed. The derived closed formulations of the second-order statistics were shown to be generalized, accurate, easily evaluated, and clearly insightful with respect to their physical interpretation although they are approximate to those of the true MRC.

AB - A statistical approach facilitating performance assessment in maximum-ratio combining (MRC)-like reception over independent nonidentically distributed (INID) Nakagami-m fading channels was investigated. Using the proposed method, generalized simple closed-form second-order statistics, i.e., level-crossing rate (LCR) and average fade duration (AFD), can be readily formulated. These second-order statistics can be classified as generalized because multiple (i.e., not limited to two) identically or nonidentically distributed diversity branches can be incorporated. These closed formulations can be accurately applied in various practical environments where nonidentically distributed branches are presented, e.g., single-user single-input-multiple-output (SU-SIMO) applications, relay networks, and macrodiversity reception in wideband code-division multiple access (W-CDMA) communications. The analytic formulations derived in this work were comprehensively verified in computer simulations. The derived closed forms were also carefully verified by comparison with those obtained using the true MRC in the degenerate scenarios, i.e., those in which only two diversity branches exist or where identically distributed diversity branches can be assumed. The derived closed formulations of the second-order statistics were shown to be generalized, accurate, easily evaluated, and clearly insightful with respect to their physical interpretation although they are approximate to those of the true MRC.

KW - Average fade duration (AFD)

KW - Diversity combining

KW - Level-crossing rate (LCR)

KW - Nakagami-fading channel

UR - http://www.scopus.com/inward/record.url?scp=84863165865&partnerID=8YFLogxK

U2 - 10.1109/TVT.2011.2180729

DO - 10.1109/TVT.2011.2180729

M3 - 期刊論文

AN - SCOPUS:84863165865

SN - 0018-9545

VL - 61

SP - 859

EP - 865

JO - IEEE Transactions on Vehicular Technology

JF - IEEE Transactions on Vehicular Technology

IS - 2

M1 - 6111325

ER -