optical wireless communication system model capacity and coding

... Presentation and Thesis Writing 3.8 Conclusions 23 25 25 25 26 26 27 27 4 SYSTEM MODELING 4.1 Introduction 4.2 OptiSystem Software 4.3 System Model in OptiSystem 4.4 System Components ... presented and finally this chapter explains each and every subsystems of the model. 4.2 OptiSystem Software The OptiSystem software is developed by Optiwave to perform complex optical communication ... are optical transmitter, OWC channel and optical receiver. The design was then improved by builing the optical transmitter and receiver block by block. 3.5 IsOWC System Simulation of Model...

Ngày tải lên: 19/01/2014, 07:20

... distributed systems. In this paper, we take the first significant steps in building and understanding the issues in implementing practical cooperative communication systems. We focus on amplify and forward ... estimation, and lack of perfect synchronization. We have built a real-time system to understand the gains of cooperative communication in an operational system in the presence of all channel and device ... STS/LTS preamble in this slot. The 2 EURASIP Journal on Wireless Communications and Networking S R D Figure 1: Nodes in basic amplify and forward system. which shows that from the point of view of...

Ngày tải lên: 21/06/2014, 20:20

Ngày tải lên: 13/08/2014, 11:22

Ngày tải lên: 26/10/2014, 14:15

... the Durkin’s model, the Okumura model, the Hata’s model, the PCS extension of the Hata model, the Walfisch and Bertoni model, and the wideband PCS microcell model [397]. 1.3 Organization and targeted ... autonomic communications. • Wireless intelligent transportation system: Awireless intelligent transportation system (ITS) refers to an integrated wireless communication and software system that ... stationary and predictable, wireless channels are extremely random and hard to analyze. Modeling wireless channels is one of the most challenging tasks encountered in wireless network design. Wireless...

Ngày tải lên: 16/03/2014, 20:20

... features of digital communication systems  Some basic concepts and definitions such as as signal classification, spectral density, random process, linear systems and signal bandwidth. Lecture ... comparing and selecting PCM waveforms:  Spectral characteristics (power spectral density and bandwidth efficiency)  Bit synchronization capability  Error detection capability  Interference and ... companding )(ty )(tx )( ˆ ty )( ˆ tx x )(xCy = x ˆ y ˆ Compress Qauntize Channel Expand Transmitter Receiver Lecture 2 12 Quantization error  Quantizing error: The difference between the input and...

Ngày tải lên: 23/03/2014, 10:21

... PAM T t )( 1 t ψ T 1 0 Digital Communications I: Modulation and Coding Course Term 3 - 2008 Catharina Logothetis Lecture 5 Lecture 5 2 Last time we talked about:  Receiver structure  Impact of AWGN and ISI on ... observation Vector  AWGN channel model:  Signal vector is deterministic.  Elements of noise vector are i.i.d Gaussian random variables with zero-mean and variance . The noise vector pdf ... to maximize SNR  Matched filter and correlator receiver  Signal space used for detection  Orthogonal N-dimensional space  Signal to waveform transformation and vice versa Lecture 5 7 Detection...

Ngày tải lên: 23/03/2014, 10:21

... Switzerland e-mail: marc-alexandre.dubois@csem.ch; claude.muller@csem.ch C.C. Enz and A. Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, ... 333, USA e-mail: piazza@ece.cmu.edu C.C. Enz and A. Kaiser (eds.), MEMS-based Circuits and Systems for Wireless Communication, Integrated Circuits and Systems, DOI 10.1007/978-1-4419-8798-3 2, © ... reader can refer to [15 ]and[ 16]. 1.3.2 One-Dimensional Mason Model The most famous model used in the BAW field is the Mason model, which is a 1D model. As such, it cannot handle the spurious modes...

Ngày tải lên: 30/03/2014, 07:20

... and evaluation of the code.  Block codes are based on algebraic/combinatorial techniques.  Convolutional codes are based on construction techniques. Digital Communications I: Modulation and ... encoder. Lecture 10 10 Effective code rate  Initialize the memory before encoding the first bit (all- zero)  Clear out the memory after encoding the last bit (all- zero)  Hence, a tail of zero-bits is ... of data bits and k=1 is assumed: data Encoder codewordtail ceff R KLn L R < −+ = )1( Lecture 10 4 Convolutional codes  Convolutional codes offer an approach to error control coding substantially...

Ngày tải lên: 30/03/2014, 10:20

... modulation and coding schemes  Probability of error, required bandwidth, delay  Trade-offs between power and bandwidth  Uncoded and coded systems Lecture 13 17 Design example of uncoded systems ... limited systems  Two major communication resources:  Transmit power and channel bandwidth  In many communication systems, one of these resources is more precious than the other. Hence, systems ... formatting, coding, modulation  Design goals:  Probability of error and delay constraints  Trade-off between parameters:  Bandwidth and power limited systems  Trading power with bandwidth and vise...

Ngày tải lên: 30/03/2014, 10:20

... its capability of modeling the real systems, some typical sensor chips will be modeled b y SystemC and the interaction between sensors and environment will be stu died. More communication protocols, ... paper and introduces the future work. 2 Related work At present, WSN simulations mainly involve two parts: node system modeling and network modeling. The node system includes the hardware and software ... 1666–2005 IEEE Standard SystemC Language Reference Manual, (Institute of Electrical and Electronics Engineers, 2006) 4. F Fummi, D Quaglia, F Stefanni, A systemcbased framework for modeling and simulation...

Ngày tải lên: 20/06/2014, 22:20

... linear system) . A detailed discussion of theAFandPFcanbefoundin[2, pages 233–243 and 264– 284] and [5]. Consider briefly the main statements regarding the AF and PF. There are two linear systems ... systems with random signature sequences,” IEEE Transactions on Communications, vol. 37, no. 10, pp. 1052–1061, 1989. [35] J. C. Liberti Jr . and T. S. Rappaport, Smart Antennas for Wireless Communications: ... R. E. Ziemer and W. H. Tranter, Principles of Communications: Systems, Modulation, and Noise, John Wiley & Sons, New York, NY, USA, 6th edition, 2010. [34] R. K. Morrow Jr. and J. S. Lehnert,...

Ngày tải lên: 21/06/2014, 05:20

... Stanwood, and N. J. van Waes, WirelessMAN: Inside the IEEE802.16 Standard for Wireless Metropolitan Networks, IEEE Press, 2006. [2] P. Chaporkar and S. Sarkar, Wireless multicast: theory and approaches,” ... the system complexity and resources for channel estimation and feedback signaling. Furthermore, it can cope with fast time-varying fading channels, especially in mobile wireless communications systems. 2.4.4. ... subcarrier. ECOMP is then expanded to make use of both time diversity and frequency diversity to investigate the trade-off between throughput and delay. EURASIP Journal on Wireless Communications and Networking...

Ngày tải lên: 21/06/2014, 11:20

... 2 EURASIP Journal on Wireless Communications and Networking system is used to compare the BER p erformance of both mea- sured and modeled channels. The authors conclude that ... for low-cost and low- power 60 GHz communications systems and are evaluated and compared by considering the effects of front end non- ideality. The authors found that OQPSK with FDE and non- fractional ... heterodyne architecture can enable the compact and low-cost millimeter-wave receivers for the future wireless communications systems such as the IEEE 802.15.3c wireless personal area networks (WPAN)...

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 22/06/2014, 22:20

Ngày tải lên: 23/06/2014, 00:20

Ngày tải lên: 23/06/2014, 00:20