Outage Probability and Optimum Combining for Time Division Broadcast Protocol

Author

Yi, Zhihang ; Ju, MinChul ; Kim, Il-Min

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON, Canada

Volume

10

Issue

5

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

1362

Lastpage

1367

Abstract

Time division broadcasting (TDBC) is a well-known bidirectional protocol. In this protocol, two sources exchange information with the help of a relay terminal. For amplify-and-forward (AF)-based TDBC, we first derive a tight lower bound of the outage probability in closed-form, and it is very close to the exact outage probability in the whole signal-to-noise ratio (SNR) range irrespective of the values of channel variances. Using the tight lower bound, diversity-multiplexing tradeoff of the TDBC protocol is obtained for finite-SNR. Furthermore, we investigate how to optimize the TDBC protocol; specifically, an optimum method to combine the received signals at the relay terminal is developed. This method minimizes the outage probability and maximizes the total mutual information of the TDBC protocol at the same time.

Keywords

amplify and forward communication; probability; protocols; SNR; amplify-and- forward-based TDBC protocol; bidirectional protocol; diversity-multiplexing tradeoff; outage probability; signal-to-noise ratio; time division broadcast protocol; Analytical models; Diversity reception; Multiplexing; Mutual information; Protocols; Relays; Signal to noise ratio; Amplify-and-forward (AF); bidirectional network; optimum combining method; outage probability; time division broadcast (TDBC);

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2011.030911.100769

Filename

5738653