optical code division multiple access communication networks theory and applications pdf

... transmission. THEORY OF CODE DIVISION MULTIPLE ACCESS COMMUNICATION 1 INTRODUCTION TO CELLULAR MOBILE RADIO COMMUNICATION The subject of this book is code division multiple access (CDMA) communi- cations. ... during Theory of Code Division Multiple Access Communication, by Kamil Sh. Zigangirov ISBN 0-471-45712-4 Copyright  2004 Institute of Electrical and Electronics Engineers 1 THEORY OF CODE DIVISION MULTIPLE ... source coding and channel error-correcting coding) and the corresponding signal pro- cessing techniques at the receiver. 1.2 FREQUENCY DIVISION AND TIME DIVISION MULTIPLE ACCESS Multiple access schemes...

Ngày tải lên: 01/06/2014, 11:27

... 64 2.8 Multiple Access Performance of Frequency-Hopped Code Division Multiple Access 67 2.9 Summary 71 3. Cellular Code Division Multiple Access 73 3.1 Principles of Cellular Code Division Multiple ... difference be- tween CDMA and more widely understood orthogonal access techniques such as time division multiple access and frequency division multiple access. Additionally, random access schemes such ... providing multiple access, and we will briefly examine the major techniques in this chapter. However, the focus of this book is one specific multiple access technique termed code division multiple access...

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Ngày tải lên: 25/07/2014, 09:39

... Conflict-Free Medium Access Control 2 1.1.1 Time Division Multiple Access 3 1.1.2 Frequency Division Multiple Access 5 1.1.3 Code Division Multiple Access 6 1.1.4 Traffic Engineering and Trunking Efficiency ... 22 2. Spread Spectrum Techniques for Code Division Multiple Access 23 2.1 Forms of Code Division Multiple Access 23 2.2 Direct Sequence Code Division Multiple Access 24 2.2.1 Power Spectral Density ... Performance of Frequency-Hopped Code Division Multiple Access 67 2.9 Summary 71 3. Cellular Code Division Multiple Access 73 3.1 Principles of Cellular Code Division Multiple Access 73 3.1.1 Interference...

Ngày tải lên: 07/08/2014, 21:20

... Techniques for Code Division Multiple Access In the previous chapter, we reviewed the basic concepts of multiuser communications and the multiple access techniques used to allow multiple users ... 2.4. The link performance and multiple access capabilities of DS-CDMA will be discussed in Sections 2.5 and 2.6, respectively, and the link performance and multiple access capabilities of FH-CDMA ... channel is in use. Carrier sense multiple access (CSMA) and carrier sense multiple access/ collision avoidance (CSMA/CA) are both contention-based Random wait Random wait Node 1 packet Node 2 packet Node...

Ngày tải lên: 07/08/2014, 21:20

... FOR CODE DIVISION MULTIPLE ACCESS 35 all sequences generated by summing a and a  , we obtain a set of 2 n − 1 Gold codes. We can also obtain another 2 n/2 − 1 codes by modulo-2 summing a  and ... sequence and l is an integer. P1: IML/FFX P2: IML MOBK023-02 MOBK023-Buehrer.cls September 28, 2006 15:54 SPREAD SPECTRUM TECHNIQUES FOR CODE DIVISION MULTIPLE ACCESS 33 TABLE 2.1: Code length N and ... 28, 2006 15:54 30 CODE DIVISION MULTIPLE ACCESS (CDMA) FIGURE 2.4: Comparison of original/despread signal and spread signal spectra for DS/SS with square pulses. 2.2.2 Multiple Access The DS/SS...

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Ngày tải lên: 02/06/2015, 17:26

... Conference on Communication, Control and Computing, pp. 170–179, Monticelli, Ill, USA, October 2002. [4] P. Li, L. Liu, K. Wu, and W. Leung, “Interleave -division multiple- access (IDMA) communication ... and Optical Communications Networks (WOCN ’04), pp. 179–182, Muscat, Oman, June 2004. [9] S. Zhou, Y. Li, M. Zhao, X. Xu, J. Wang, and Y. Yao, “Novel techniques to improve downlink multiple access ... INTRODUCTION Spread-spectrum multiple access is a popular technique al- lowing several users to share the same bandwidth at the same time. Spread spec trum is often equated with direct-sequence code- division multiple access...

Ngày tải lên: 22/06/2014, 23:20

... 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 ... 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) applications. Chia-Chin ... system can be a low-cost and high-performance 16-QAM transceiver es- pecially for the local multipoint distribution system (LMDS) applications. The last paper by S. O. Tatu and E. Moldovan proposed...

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 26/06/2014, 23:20

... form of frequency multiplexing that could be efficient for wide band communication. The signal frequency band is divided into several frequency subchannels in order to get narrow band channels. Orthogonality ... and N R receive antennas can achieve a maximum diversity gain of N T ì N R . Multiplexing gain Thanks to the use of multiple antennas, MIMO systems perform spatial multiplexing. Independent and ... question is how to include multiple antennas at transmi er and receiver side and, what are the appropriate methods of detection and signal processing strategies for specifi c applications? This book,...

Ngày tải lên: 27/06/2014, 01:20

... yields the D 3 and D 2 relations derived in the previous paragraph. Machine tool technology 13 Fig. 1.13 A traditional – column and knee – design and (right and below) partly-built and complete ... the chip and the tool and the plas- tic flow stress of the work material. It also introduces observations on the length of contact between a chip and tool and on chip radius of curvature; and discusses ... 2.2.4). Tresca’s and Mallock’s papers introduce two of the main elements of metal cutting theory, namely plasticity and the importance of the friction interaction between chip and tool. Tresca...

Ngày tải lên: 27/06/2014, 06:20

... Theory and Applications http://dx.doi.org/10.5772/2622 Edited by Sohail Iqbal, Nora Bumella and Juan Carlos Fiueroa Garcia Contributors Teodor Lucian Grigorie, Ruxandra Mihaela Botez, Andrei ... mf2(Z) mf3(P) Fuzzy Controllers – Recent Advances in Theory and Applications 28 () and () i u ut u u t    (6) The active power PAV and PiAV is given by: 4 0 2 2 T AV AV P P u i u i ... R&D institutions and industry initiated and developed morphing aircrafts studies in the last decade (Munday and Jacob, 2002; Sanders, 2003; Manzo et al., 2004; Skillen and Crossley, 2005;...

Ngày tải lên: 29/06/2014, 09:20