Báo cáo toán học: " Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems" pptx

... 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 ... schedul- ing. In addition, it offers better diversity/multiplexing trade-off. The performance of MIMO OFDM-CDMA scheme using STF-domain spre...

Ngày tải lên: 20/06/2014, 21:20

... is just the repetition of the proof of Lemma 3.2, we omit the details of its proof. With the aid of above preparations, now we will give the proof of Theorem 1.2. Proof of Theorem 1.2 By(1.8), ... y n ) is bounded for any x, y Î E. Using L emma 2.1, the remainder is similar to the proof of Lemma 3.1, so we omit the details of its proof. Lemma 3.4 Under the conditions of Th...

Ngày tải lên: 20/06/2014, 21:20

... 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 Receiver In this section, ... *Corresponding authors: h Performance evaluation of space–time–frequency spreading for MIMO OFDM–CDMA systems Haysam Dahman ∗ and Yousef Shayan Department of Electr...

Ngày tải lên: 18/06/2014, 22:20

... [23], is of great interest and provides interesting topics for future research. 7 Performance comparisons In this section, we will first provide some results demonstrating the performance of our ... chosen two different scenarios for simulations. For the PAPR and spectral leakage simulations we have used four times oversampling, r = 4, and for the performance evaluations we ha...

Ngày tải lên: 21/06/2014, 23:20

... pair- wise comparisons of competing systems over a test set of several inputs and 70% for ranking summaries of a specific input. 1 Introduction Efforts for the development of automatic text sum- marizers ... of systems, ignoring the linguistic quality of the system out- put. Part of the reason for this imbalance is the existence of ROUGE (Lin and Hovy, 2003; Lin, 2004), t...

Ngày tải lên: 16/03/2014, 23:20

... relative to the size of the corpus. 184 Theoretical Evaluation of Estimation Methods for Data-Oriented Parsing Willem Zuidema Institute for Logic, Langu age and Computation University of Amsterdam Plantage ... simple com- binations of the frequencies f 1 . . . f 4 . Observa- tions of these frequencies therefore do not add any extra information, and the problem of fi nd- ing t...

Ngày tải lên: 17/03/2014, 22:20

... and predicting the performance is also the target of the cognitive controller built using multilayer feed-forward neural network [13]. The controller performs this task for different channels ... of decision making. Learning mechanisms also provide the ground for enabling proactive handling of problematic situations, i.e. identifying and handling issues that could undermine th...

Ngày tải lên: 20/06/2014, 20:20

... upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. New proofs of Schur-concavity for a class of symmetric functions Journal of Inequalities and Applications ... below). For information about publishing your research in Journal of Inequalities and Applications go to http://www.journalofinequalitiesandapplications.com/authors/instructions...

Ngày tải lên: 20/06/2014, 21:20

... packets. 5.3. The mobility effects on the audio transmission performance This section is devoted for studying the effects of the mobility of the wireless ad hoc network device (V c ) on the transmitted ... the effectiveness of the proposed scenarios on the error performance through the BER variation with the channel SNR. As shown in this figure, the error spreading capabi...

Ngày tải lên: 20/06/2014, 20:20