Pattern classification based multiuser detectors for CDMA communication systems

... behind DS -CDMA, followed by an overview of the existing conventional multiuser detectors The problem of multiuser detection is reformulated as one of pattern recognition, and two multiuser detectors ... Multiple-Access (CDMA) : An Overview 1.4.1 Motivation for CDMA 1.4.2 Basic Synchronous CDMA Model 1.4.3 Basic Asynchronous CDMA Model 1.5 Limitations of Conventional CDM...

Ngày tải lên: 28/11/2015, 13:33

... …………………………………………………… Chapter 3: Hybrid-MGNANN Multiuser Detector for DS- CDMA 3.1 Neural Network in DS- CDMA Multiuser Detection 3.2 Hopfield Neural Network (HNN) for Multiuser Detection 3.3 Problems with ... Euclidean norm xi List of Abbreviations AWGN ANN ANNMD BER BPSK CD CDMA CLB DS DS -CDMA DSP DS- SS DSSS-BPSK DECO FDMA FH FH -CDMA HNN HNNMD H-RBFN H-MGNAN...

Ngày tải lên: 26/11/2015, 22:57

... Fig.1.2 with interleaved subcarrier allocation for the two users 1.4 Motivations in OFDMA- based resource allocation The main allocation issue in OFDMA- based resource allocation is to jointly optimize ... algorithms for OFDMA- based resource allocation in systems such as Single Input Single Output (SISO) - OFDMA, Multiple Input Multiple Output (MIMO) - OFDMA,...

Ngày tải lên: 11/09/2015, 10:15

... reference system with GLRT detection Section develops two fast multi-symbol transmitted reference -based detectors Section shows the numerical results for a constant channel and random channels, respectively ... 1.1 dB gain for HD-MSTR and 0.6 dB for SD-MSTR) and the performance gap becomes smaller when M is larger When M = 10, the gap reduces to around 0.5 dB for HD-MSTR case...

Ngày tải lên: 21/06/2014, 16:20

... G Maral and M Bousquet, Satellite Communication Systems, John Wiley & Sons, New York, NY, USA, 1996 [2] M Ibnkahla, Q M Rahman, A I Sulyman, H A Al-Asady, J Yuan, and A Safwat, “High-speed satellite ... nonlinear gain function g (A) is commonly referred to as the AM/AM characteristic and the nonlinear phase function Φ (A) is called the AM/PM characteristic These are expressed as g...

Ngày tải lên: 22/06/2014, 23:20

... throughput In this paper, we propose a cross-layer AC policy combined with an ARQ-based ROP algorithm for a CDMA beamforming system Both optimal and suboptimal admission control policies are investigated ... enough complexity for admission control at the packet level Similar to call/connection level admission control, in a packet-switched system, a packet admission c...

Ngày tải lên: 22/06/2014, 19:20

... source design environment for embedded systems based on SystemC,” Design Automation for Embedded Systems, vol 9, no 4, pp 293–312, 2004 [14] M Raulet, F Urban, J.-F Nezan, C Moy, O Deforges, ... for example, an FPGA The communication model consists of a RAM for hardware-software communication connected by a system bus, and both processors accommodate local memory units fo...

Ngày tải lên: 22/06/2014, 22:20

... ON THE PERFORMANCE AND CAPACITY OF SPACE- TIME BLOCK CODED MULTICARRIER CDMA COMMUNICATION SYSTEMS HU XIAOYU (B Eng, M Eng) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY ... combination - STBC MCCDMA as the candidate of radio techniques for the next generation wireless communication system In the thesis, we concentrate the research on...

Ngày tải lên: 16/09/2015, 15:54

... impedance bandwidth The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations Dual linear polarization is attained ... operating bandwidth This thesis presents the broadband design of dual and circularly polarized antennas, and the bandwidth definitions are first established 1....

Ngày tải lên: 02/10/2015, 12:56

... Three types of UWB systems are defined in this R&O: imaging systems, communication and measurement systems, and vehicular radar systems Specifically, UWB characterizes transmission systems with ... comparison for communication systems Figure 1.2 FCC regulated spectral mask for UWB indoor communication systems Figure 1.3 Operation distance and data rate of maj...

Ngày tải lên: 04/10/2015, 17:05

... ITERATIVE MULTIUSER DETECTION FOR ULTRA- WIDEBAND SYSTEMS WANG XIAOLI (B.Eng University of Electronic Science & Technology of China) A THESIS SUBMITTED FOR THE DEGREE OF MASTER ... Adaptive MMSE Multiuser Detection 22 iv 2.4 Iterative Interference Cancellation & Decoding 24 2.5 Summary 27 Chapter Iterative Multiuser Detection for UWB Systems 28 ... 28 3.2 Itera...

Ngày tải lên: 08/11/2015, 17:16

... Code -PIC is comparable to Sub -PIC up to a system load of about 1.5N and for higher loads Code -PIC outperforms Sub -PIC Conclusion In this paper, Code -PIC scheme is introduced for multirate CI/MC-CDMA ... communication This paper attempts to improve the performance of multirate CI/MC-CDMA system by a novel code-based iterative PIC (Code -PIC) scheme Proper phas...

Ngày tải lên: 20/06/2014, 22:20

... users Relaxation factor Matched filter detector Decorrelator detector Linear BSOR -GSIC detector (2 stages) Linear BSOR -GSIC detector (3 stages) Matched filter detector Decorrelator detector Linear BSOR -GSIC ... Chip-level linear BSOR -GSIC detector (μ = 1.8) 10 Near-far ratio Matched filter detector Decorrelator detector Linear BSOR -GSIC detector (μ = 1)...

Ngày tải lên: 22/06/2014, 00:20

... users Relaxation factor Matched filter detector Decorrelator detector Linear BSOR -GSIC detector (2 stages) Linear BSOR -GSIC detector (3 stages) Matched filter detector Decorrelator detector Linear BSOR -GSIC ... Chip-level linear BSOR -GSIC detector (μ = 1.8) 10 Near-far ratio Matched filter detector Decorrelator detector Linear BSOR -GSIC detector (μ = 1)...

Ngày tải lên: 22/06/2014, 06:20

... Non-Singleton Fuzzy Rule- Based Classifier: Handling the Input Uncertainty 33 2.1 Non-Singleton Fuzzy Rule- Based Classifier (NSFRBC) 35 2.2 Characteristics of Non-Singleton Fuzzy Rule- Based ... (1.18) j=1 Non fuzzy rule- based classifier Fuzzy rule- based and non fuzzy rule- based classifiers complement each other to form the whole framework of fuzzy pattern cl...

Ngày tải lên: 11/09/2015, 09:16