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1968 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 45, NO. 6, SEPTEMBER 1999 Optimal Sequences, Power Control, and User
 

Summary: 1968 IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 45, NO. 6, SEPTEMBER 1999
Optimal Sequences, Power Control, and User
Capacity of Synchronous CDMA Systems
with Linear MMSE Multiuser Receivers
Pramod Viswanath, Student Member, IEEE, Venkat Anantharam, Fellow, IEEE,
and David N. C. Tse, Member, IEEE
Abstract--There has been intense effort in the past decade to
develop multiuser receiver structures which mitigate interference
between users in spread-spectrum systems. While much of this
research is performed at the physical layer, the appropriate
power control and choice of signature sequences in conjunction
with multiuser receivers and the resulting network user capacity
is not well understood. In this paper we will focus on a single cell
and consider both the uplink and downlink scenarios and assume
a synchronous CDMA (S-CDMA) system. We characterize the
user capacity of a single cell with the optimal linear receiver
(MMSE receiver). The user capacity of the system is the maximum
number of users per unit processing gain admissible in the system
such that each user has its quality-of-service (QoS) requirement
(expressed in terms of its desired signal-to-interference ratio)

  

Source: Anantharam, Venkat - Department of Electrical Engineering and Computer Sciences, University of California at Berkeley
Tse, David - Department of Electrical Engineering and Computer Sciences, University of California at Berkeley
Viswanath, Pramod - Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign

 

Collections: Engineering