We investigate the effect of fading correlation and branch gain imbalance on the average output signal-to-noise ratio (SNR) in conjunction with dual selection combining (SC). In particular, starting with the moment generating function of the dual SC output SNR, we derive a closed-form expression for the average output SNR in the general case of correlated unbalanced Nakagami-m fading channels. We then show that the generic result can be further simplified for the special cases of Rayleigh fading, uncorrelated branches, and/or equal average SNR's. Because of their simple form, the given expressions readily allow numerical evaluation for cases of practical interest.
Bibliographical noteFunding Information:
Manuscript received May 3, 1999. The associate editor coordinating the review of this letter and approving it for publication was Prof. A. Haimovich. This work was supported in part by a Grant-in-Aid of Research from the Office of the Vice President for Research and Dean of the Graduate School of the University of Minnesota and in part by the National Science Foundation under Grant NSF/ECS 9979443.
ASJC Scopus subject areas
- Modelling and Simulation
- Computer Science Applications
- Electrical and Electronic Engineering