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On the Capacity Scalings of the Multiple Antenna Group-Broadcast Systems
 

Summary: On the Capacity Scalings of the Multiple Antenna
Group-Broadcast Systems
Amir F. Dana1, Tareq Y. Al-Naffouri2, and Babak Hassibi1
1 Electrical Engineering Dept., California Institute of Technology, Pasadena, CA
2 Electrical Engineering Dept., King Fahd University of Petroleum and Minerals, Saudi Arabia
Abstract-- In this paper, we consider a multi-user system called
the group-broadcast system. In this scenario the users are divided
into different groups. Users in each group are interested in a
common information independent from that of other groups.
Such a situation occurs for example in digital audio and video
broadcast systems where the users are divided into various groups
according to the shows they are interested in. The paper first
obtains upper and lower bounds for the sum rate capacity. Then
it looks at system capacity for the large number of users regime
and fixed number of antennas. Finally, the case when the number
of users and antennas grow simultaneously is studied. It is shown
that in order to achieve a constant rate per user the number of
transmit antennas should scale at least logarithmically in the
number of users.
I. INTRODUCTION

  

Source: Al-Naffouri, Tareq Y. - Electrical Engineering Department, King Fahd University of Petroleum and Minerals

 

Collections: Engineering