Multiuser Receivers in Cellular CDMA
نویسنده
چکیده
| In this paper we show that eecient multiuser receivers result in a cellular capacity that is many times that of conventional cellular systems. We also show that the joint detection of users in soft handover regions dramatically increases system capacity. Although we require a multiuser receiver that can provide single user performance , we show that there is no gain doing so when the number of users is very large relative to the processing gain of the spreading.
منابع مشابه
Nonlinear Multiuser Receiver for Optimized Chaos-Based DS-CDMA Systems
Chaos based communications have drawn increasing attention over the past years. Chaotic signals are derived from non-linear dynamic systems. They are aperiodic, broadband and deterministic signals that appear random in the time domain. Because of these properties, chaotic signals have been proposed to generate spreading sequences for wide-band secure communication recently. Like conventional DS...
متن کاملPerformance analysis for the improved linear multiuser detectors in BPSK-modulated DS-CDMA systems
Recently, a new class of linear multiuser receivers for direct-sequence code-division multiple-access (CDMA) systems employing binary phase-shift keying modulation has been introduced. Unlike classical decorrelating and minimum mean-square error linear multiuser detectors, the new receivers exploit the information contained in the pseudoautocorrelation of the observables, and are, thus, capable...
متن کاملA Low-Complexity Optimum Multiuser Receiver for DS-CDMA Wireless Systems
Multiuser detection is an important technology in wireless CDMA systems for improving both data rate as well as user capacity. However, the computational complexity of multiuser detection prevents the widespread use of this technique. Most of the CDMA systems today and in the near future will continue to use the conventional matched filter with its comparatively low user capacity and a slow dat...
متن کاملLINEAR MULTIUSER RECEIVERS FOR ASYNCHRONOUS MC−CDMA SYSTEMS (ThuPmOR8)
In this paper, we propose a linear multiuser receiver for asynchronous MC−CDMA systems. The proposed receiver consists of two stages, namely a bank of MRC receivers and a MMSE multiuser detector, and it relies both on channel and delay estimation. The performance of the receiver is greatly improved with respect to the simple MRC approach. Moreover, the additional complexity is moderate, so that...
متن کاملLink and System Level Performance of Multiuser Detection CDMA Uplink
The link level performance and the cellular system capacity in the uplink direction of a CDMA cellular system utilising multiuser detection base station receivers is analysed by simulation. In the receiver, parallel multistage multiuser detection is employed together with two-antenna diversity reception and fast closed-loop power control. A system level simulator is built to utilise the link le...
متن کامل