The effects of Gaussian weighting errors in hybrid SC/MRC combiners

Author

Annamalai, A. ; Tellambura, C.

Author_Institution

Bradley Dept. of Electr. & Comput. Eng., Virginia Tech., Alexandria, VA, USA

Volume

1

fYear

2000

fDate

2000

Firstpage

211

Abstract

The paper examines the impact of Gaussian distributed weighting errors (in the channel gain estimates used for coherent combination) on the statistics of the output of hybrid selection/maximal-ratio (SC/MRC) receiver as well as the degradation of the average symbol error rate (ASER) performance from the ideal case. New expressions for the probability density function (PDF), cumulative distribution function (CDF) and moment generating function (MGF) of the coherent hybrid SC/MRC combiner output signal-to-noise ratio (SNR) are derived. The MGF is then used to derive exact closed form ASER formulas for binary and M-ary modulations employing a nonideal hybrid SC/MRC receiver in Rayleigh fading. Results for both SC and MRC are obtained as limiting cases. The effect of the weighting errors on the outage rate of error probability and the average combined SNR are also investigated. These analytical results provide some insights into the trade-off between diversity gain and combination losses with the increasing order of diversity branches in an energy-sharing communication system

Keywords

Gaussian distribution; Rayleigh channels; diversity reception; error statistics; modulation; radio receivers; statistical analysis; CDF; Gaussian distributed weighting errors; M-ary modulation; PDF; Rayleigh fading; SNR; average symbol error rate; binary modulation; channel gain estimates; coherent combination; coherent hybrid SC/MRC combiner; combination losses; cumulative distribution function; diversity branches; diversity gain; energy-sharing communication system; error probability; exact closed form ASER formulas; hybrid SC/MRC combiners; hybrid selection/maximal-ratio receiver; moment generating function; nonideal hybrid SC/MRC receiver; outage rate; probability density function; signal-to-noise ratio; statistics; Degradation; Distribution functions; Error analysis; Hybrid power systems; Performance gain; Probability density function; Rayleigh channels; Signal generators; Signal to noise ratio; Statistical distributions;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications and Networking Confernce, 2000. WCNC. 2000 IEEE

Conference_Location

Chicago, IL

ISSN

1525-3511

Print_ISBN

0-7803-6596-8

Type

conf

DOI

10.1109/WCNC.2000.904629

Filename

904629