Bursty traffic over CDMA: predictive MAI temporal structure, rate control and admission control
Computer Networks: The International Journal of Computer and Telecommunications Networking
Variable Step Size Affine Projection Algorithm for Adaptive Multiuser DS-CDMA MMSE Receiver
Wireless Personal Communications: An International Journal
IEEE Transactions on Communications
Adaptive resource allocation for multiuser MIMO systems with transmit group MMSE
IEEE Transactions on Wireless Communications
IEEE Transactions on Information Theory
Maximum sum-rate of MIMO multiuser scheduling with linear receivers
IEEE Transactions on Communications
IEEE Transactions on Communications
Achievable sum rate of MIMO MMSE receivers: a general analytic framework
IEEE Transactions on Information Theory
Effect of chip-level asynchronism on a CDMA-based overlay system for optical network management
IEEE Journal on Selected Areas in Communications - Special issue on next-generation broadband optical access network technologies
IEEE Transactions on Information Theory
| Hi-index | 755.02 |
Multiple-access interference (MAI) in a code-division multiple-access (CDMA) system plays an important role in performance analysis and characterization of fundamental system limits. We study the behavior of the output MAI of the minimum mean-square error (MMSE) receiver employed in the uplink of a direct-sequence (DS)-CDMA system. We focus on imperfect power-controlled systems with random spreading, and establish that in a synchronous system (1) the output MAI of the MMSE receiver is asymptotically Gaussian, and (2) for almost every realization of the signatures and received powers, the conditional distribution of the output MAI converges weakly to the same Gaussian distribution as in the unconditional case. We also extend our study to asynchronous systems and establish the Gaussian nature of the output interference. These results indicate that in a large system the output interference is approximately Gaussian, and the performance of the MMSE receiver is robust to the randomness of the signatures and received powers. The Gaussianity justifies the use of single-user Gaussian codes for CDMA systems with linear MMSE receivers, and implies that from the viewpoints of detection and channel capacity, signal-to-interference ratio (SIR) is the key parameter that governs the performance of the MMSE receiver in a CDMA system