DocumentCode :
1405292
Title :
An Approach to the Second-Order Statistics of Maximum-Ratio Combining-Like Reception Over Independent Nakagami Channels
Author :
Jia-Chin Lin
Author_Institution :
Dept. of Commun. Eng., Nat. Central Univ., Jhongli, Taiwan
Volume :
61
Issue :
2
fYear :
2012
Firstpage :
859
Lastpage :
865
Abstract :
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.
Keywords :
MIMO communication; Nakagami channels; code division multiple access; diversity reception; statistical analysis; CDMA; average fade duration; closed-form second-order statistics; diversity branches; independent nonidentically distributed Nakagami-m fading channels; level-crossing rate; macrodiversity reception; maximum-ratio combining-like reception; performance assessment; relay networks; single-user single-input-multiple-output applications; wideband code-division multiple access communications; Diversity reception; Fading; Multiaccess communication; Nakagami distribution; Probability density function; Reactive power; Spread spectrum communication; Average fade duration (AFD); Nakagami-fading channel; diversity combining; level-crossing rate (LCR);
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2011.2180729
Filename :
6111325
Link To Document :
بازگشت