Energy-efficient packet transmission over a wireless link
IEEE/ACM Transactions on Networking (TON)
Greedy SINR maximization in collaborative multibase wireless systems
EURASIP Journal on Wireless Communications and Networking - Special issue on multiuser MIMO networks
Power-efficient rate scheduling in wireless links using computational geometric algorithms
Proceedings of the 2006 international conference on Wireless communications and mobile computing
QoS-based resource allocation and transceiver optimization
Communications and Information Theory
Dynamic Resource Allocation in CDMA Systems with Deterministic Codes and Multirate Provisioning
IEEE Transactions on Mobile Computing
Joint transmitter-receiver optimization in the downlink CDMA systems
EURASIP Journal on Applied Signal Processing
An improved overloading scheme for downlink CDMA
EURASIP Journal on Applied Signal Processing
MIMO transceiver design via majorization theory
Foundations and Trends in Communications and Information Theory
Majorization and matrix-monotone functions in wireless communications
Foundations and Trends in Communications and Information Theory
Cooperative transmit-power estimation under wireless fading
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Guaranteed performance region in fading orthogonal space-time coded broadcast channels
EURASIP Journal on Wireless Communications and Networking - Theory and Applications in Multiuser/Multiterminal Communications
Energy-robustness tradeoff in cellular network power control
IEEE/ACM Transactions on Networking (TON)
A game-theoretic framework for interference avoidance
IEEE Transactions on Communications
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Widely-linear filtering and non-cooperative transceiver optimization in wireless data networks
GameNets'09 Proceedings of the First ICST international conference on Game Theory for Networks
ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
User admissibility in uplink wireless systems with multipath and target SINR requirements
IEEE Communications Letters
Asynchronous CDMA systems with random spreading-part I: fundamental limits
IEEE Transactions on Information Theory
Game-theoretic approach to joint transmitter adaptation and power control in wireless systems
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics - Special issue on game theory
Dynamic spectral shaping in cognitive radios with quality of service constraints
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Training-feedback tradeoff in closed-loop synchronous DS-CDMA systems with adaptive user sequences
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
A complete description of the QoS feasibility region in the vector broadcast channel
IEEE Transactions on Signal Processing
IEEE Transactions on Information Theory
Adaptive binary signature design for code division multiplexing
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
Joint utility-based power control and receive beamforming in decentralized wireless networks
EURASIP Journal on Wireless Communications and Networking - Special issue on interference management in wireless communication systems: theory and applications
Spreading code assignment strategies for MIMO-CDMA systems operating in frequency-selective channels
EURASIP Journal on Wireless Communications and Networking
Opportunistic ALOHA and cross layer design for sensor networks
MILCOM'03 Proceedings of the 2003 IEEE conference on Military communications - Volume I
Power control and capacity of spread spectrum wireless networks
Automatica (Journal of IFAC)
Hi-index | 754.96 |
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) met. This characterization allows one to describe the user capacity through a simple effective bandwidth characterization: users are allowed in the system if and only if the sum of their effective bandwidths is less than the processing gain of the system. The effective bandwidth of each user is a simple monotonic function of its QoS requirement. We identify the optimal signature sequences and power control strategies so that the users meet their QoS requirement. The optimality is in the sense of minimizing the sum of allocated powers. It turns out that with this optimal allocation of signature sequences and powers, the linear MMSE receiver is just the corresponding matched filter for each user. We also characterize the effect of transmit power constraints on the user capacity