Báo cáo hóa học: " Performance analysis of OFDM modulation on indoor broadband PLC channels" ppt

... 12 http://asp.eurasipjournals.com/content/2011/1/78 RES E A R C H Open Access Performance analysis of OFDM modulation on indoor broadband PLC channels José Antonio Cortés * , Luis Díez, Francisco Javier Cañete, Juan ... procedure is used in Section 5 to evaluate the performance of the OFDM modulation. Main conclusions are summarized in Section 6. 2. Channel model In...

Ngày tải lên: 20/06/2014, 22:20

... derivati on of T pre Dela y -s u in the last subs ection. Due to the limited length of this article, the detail of analysis is omitted. When 0 ≤ i ≤ N-1, then t nonpre i nonque = f (i)−1  k=0 P nonpre i,k,k  1 μ s  + Q−1  q =0 P nonpre i,f ... number of channels N.Allofthe simulation results show that t he NP mechanism signifi- cantly improves the QoS of SUs with an acceptab...

Ngày tải lên: 20/06/2014, 22:20

... Impact of time and frequency offsets on cooperative multi-user MIMO -OFDM systems. IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 3119–3123 (2009) 20. B Zarikoff, ... Wireless Communications and Networking Conference (2009) 18. F Ng, X Li, Cooperative STBC -OFDM transmissions with imperfect synchronization in time and frequency, Asilomar Conference...

Ngày tải lên: 20/06/2014, 22:20

... use of multiple c ompu- tational units without explicitly managing allocation, synchronization or communication among those units are also one of its major advantages. This is one of the goals of ... an active pixel of the contour. The contours evolve through an activation and deactivation of the c ontour pixels through the guidance of potential fields. This evolution is control...

Ngày tải lên: 20/06/2014, 22:20

... channels in Section 4. F inally, conclusions are drawn in Section 5 . 2. OFDM SYSTEMS OFDM is a form of mutlicarrier modulation and consists of a number of narrowband orthogonal subcarriers trans- mitted ... reserved. 1. INTRODUCTION Orthogonal frequency division multiplexing (OFDM) has been considered as a promising modulation scheme for the next generation wireless communicati...

Ngày tải lên: 22/06/2014, 23:20

... their non- athletic peer. Athletes in contact and team sports demonstrated higher risk of recreation al drug abuse Table 1 Descriptive data of control samples and doping offences in the professional ... consumption in order to be allowed for professional participation under the Anti- Doping Code. Some other players had to retire from professional competitions probably due to their addic-...

Ngày tải lên: 20/06/2014, 00:20

... problem estimating the locations of the primary users, they are unable to estimate their transmission powers. Hence among all of the common location estimation algorithms only the received signal ... and covariance of estimation error of cognitive RSS-WLS algorithm is calculated. At the end, based on the results of the previous sections, an analytical performance evaluation of...

Ngày tải lên: 21/06/2014, 17:20

... investigations on forced convection in nan ofluids are reviewed in this section. Studies on free convection and thermosyphon loops will be discussed in the sec- tions to follow. Convective heat ... review of the important investigations on forced convection heat transfer at various flow and heat transfer conditions have shown that the performance of nanofluids in forced convection...

Ngày tải lên: 21/06/2014, 03:20

... induces modulation of ERK and AKT phosphorylation and increase of histone acetylation in NB4 cellsFigure 5 BPA induces modulation of ERK and AKT phosphor- ylation and increase of histone acetylation ... of BPA. The regulation of caspase-dependent pathways of apoptosis suggests a specific action on the extrinsic and intrinsic pathways of apoptosis which is con- firmed by...

Ngày tải lên: 18/06/2014, 15:20