performance evaluation of computer systems nptel

... *Corresponding authors: h Performance evaluation of space–time–frequency spreading for MIMO OFDM–CDMA systems Haysam Dahman ∗ and Yousef Shayan Department of Electrical Engineering, Concordia ... wireless communications systems. An important advantage of using STF- domain spreading in MIMO OFDM–CDMA is that the maximum number of users supported 11 D. Performance Evaluation for Zero Forcing ... and full text (HTML) versions will be made available soon. Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems EURASIP Journal on Advances in Signal Processing 2011, 2011:139...

Ngày tải lên: 18/06/2014, 22:20

... number of users. D. Performance Evaluation for Zero Forcing Receiver In this section, we will calculate probability of bit error for Zero-Forcing receiver (ZF) [18,19] to examine the performance of ... 2011:139 http://asp.eurasipjournals.com/content/2011/1/139 Page 12 of 13 RESEARCH Open Access Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems Haysam Dahman * and Yousef Shayan Abstract In ... for OFDM-CDMA system with 4Tx, 2Rx of the prop osed scheme (solid) and 2D OFDM-C DMA (dotted) in a slow fading frequency-selective environment. S N R dB Number of Users Proposed OFDM-CDMA 2D OFDM-CDMA 0 2 46 8 10...

Ngày tải lên: 20/06/2014, 21:20

... 4.5). Finally, the model evaluation is made by means of stochastic simulation (Section 4.3). 4.3. Evaluation. The evaluation is made by means of sim- ulation. The facilites of CPN Tools have been ... using sharpe,” in Proceedings of the 11th Internat ional Conference on Computer Performance Evaluation. Modelling Techniques and Tools, vol. 1786 of Lecture Notes in Computer Science, pp. 345–349, ... contribution of this work was the development of a computational tool to automate same steps of the proposed methodology. The tool was named PECES (Performance and Energy Consumption Evaluation of Embedded...

Ngày tải lên: 21/06/2014, 11:20

Ngày tải lên: 22/06/2014, 00:20

... the animation of both the systems along with the graphs of Displacement Vs. time just below the animation window of each of the suspension system. By comparing the performance of the passive ... objectives of this project have been achieved. Dynamic model for linear quarter car suspensions systems has been formulated and derived. Only one type of controller is used to test the systems performance ... [5] Prof. Dr. Yahaya Md. Sam, “Robust Control of Active Suspension System for A Quarter Car Model”, Thesis from University Teknology Malaysia, December 2006. Performance Evaluation of Active...

Ngày tải lên: 16/02/2014, 09:13

... [47] COMPARATIVE STUDY ON PERFORMANCE EVALUATION OF MUTUAL FUND SCHEMES OF INDIAN COMPANIES Prof. Kalpesh P Prajapati, Assistant Professor, S.V Institute of Management, Gujarat Technological ... source of data is website of Association of Mutual Funds in India (AMFI). The study period is 1 st January 2007 to 31 st December, 2011. The results of performance measures suggest that most of ... Characteristics & performance evaluation of selected Mutual Funds in India . 9th Indian Institute of Capital Market Conference. [4] Michael, C. J. (1967). The Performance of Mutual Funds in...

Ngày tải lên: 19/02/2014, 15:20

... to be popular today. Other, extrinsic, types of human evaluations of NLG systems include measuring the impact of different generated texts on task performance (Young, 1999), measuring how much ... 2005 NIST MT evaluation exercise, used BLEU-4 as the only method of evaluation. BLEU is a precision metric that assesses the quality of a translation in terms of the proportion of its word n- grams ... and Human Evaluation of NLG Systems Anja Belz Natural Language Technology Group CMIS, University of Brighton UK A.S.Belz@brighton.ac.uk Ehud Reiter Dept of Computing Science University of Aberdeen UK ereiter@csd.abdn.ac.uk Abstract We...

Ngày tải lên: 24/03/2014, 03:20

... task- based evaluations of NLG systems over the Internet is a valid alternative to more traditional laboratory- based evaluations. Specifically, we have shown that an Internet-based evaluation of systems ... increased amount of data also makes it possible to compare the quality of NLG systems across different evalua- tion worlds and users’ language proficiency levels. We believe that this type of evaluation ... argue that an evaluation that is based almost exclusively on na- tive speakers in universities leads to overly benign judgments about the quality of NLG systems. One advantage of the Internet-based...

Ngày tải lên: 31/03/2014, 00:20

... average number of reached nodes— it is a sort of approximated indicator of the “depth” of the propagation process. Since the RE can be interpreted as the ratio between the average number of reached ... approach is extensively described, for the evaluation of D, in Appendix 4, but can be directly re-adapted for the evaluation of RE and TE. In the remainder of this subsection, we outline the final ... conditions— this is the very idea of IF. The shape of p, as a function of d, is shown in Figure 5, for different values of c and ρ s . It can be observed that the PAF of SIF is monotonically increasing...

Ngày tải lên: 20/06/2014, 20:20

... is the sum of the fixed time from the grant time of the tagged i-packet to the start of transmission of the i-packets in the next frame and the transmission times of the random number of i- packets ... statistical behavior of the BS grant buffer of a particular SS is independent from the behavior of those of the other SSs. Therefore, we model the stochastic behavior of the BS grant buffer of a particular ... range of loads. In this case, the optimal value of the total amount of real-time capacities can be determined. In case of a more general QoS requirement (delay con- straint), the optimal set of...

Ngày tải lên: 21/06/2014, 05:20

... performance evaluation process consists of the following steps. Some of the concepts of this and the next subsection have been reused and modified from the work in [13]: (1) selection of the evaluation ... modelling for performance evaluation of real-time embedded systems, ” EURASIP Journal on Embedded Systems, 2008. [20] G. Madl, N. Dutt, and S. Abdelwahed, Performance estima- tion of distributed ... Framework for Model-Driven SoC Performance Evaluation and Exploration The presented performance evaluation models are used for early analysis of data intensive embedded systems. Figure 10 presents...

Ngày tải lên: 21/06/2014, 20:20

... using ˆ d 0 to generate soft coded bit estimates ˆ ˜ b in the soft symbols-to-bits block. These are then provided to the soft-input soft-output (SISO) decoder from which we obtain our first soft decoded bit ... Figure 10 we have shown the performance with higher order modulations. Here, the performance of LDDST compared to DDST is quite similar. Clearly, both DDST based systems improves the spectral ... 250 às Order of the RRC lter 64 RRC roll-o 0.1 Symbols per frame 4,500 TDMT pilot symbols per frame 450 Number of feedback iterations 5 No. of subbands in the analysis bank 1,024 No. of subbands...

Ngày tải lên: 21/06/2014, 23:20

... CIR H performance of the HAP system for different values of D, obtained by increasing the reuse factor N. It shows that a CIR increase of approximately 2 dB can be achieved with each increment of N ... performance (reuse factor = 3) −30 −20 −10 0 10 20 30 Distance from SPP of HAP (km) −30 −20 −10 0 10 20 30 Distance from SPP of HAP (km) 4 6 8 10 12 14 16 18 20 22 Figure 8: CIR performance of ... of CIR H and CINR H of HAP WiMAX system (refuse factor = 3) 0 0.2 0.4 0.6 0.8 1 Pr (CIR H or CINR H <X) 4 6 8 10121416182022 X (dB) CIR H CINR H Figure 9: CDF of CIR and CINR performance of...

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 22/06/2014, 20:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 22/06/2014, 23:20