spread spectrum communication systems

... PRINCIPLES OF SPREAD- SPECTRUM COMMUNICATION SYSTEMS This page intentionally left blank PRINCIPLES OF SPREAD- SPECTRUM COMMUNICATION SYSTEMS By DON TORRIERI Springer eBook ... and derivation of the fundamentals of spread- spectrum communication systems Although spread- spectrum communication is a staple topic in textbooks on digital communication, its treatment is usually ... exploiting the potential capabilities of spreadspectrum communication systems Although direct-sequence systems greatly suppress interference, practical systems require channel codes to deal with...

Ngày tải lên: 20/01/2014, 06:20

Ngày tải lên: 19/02/2014, 14:20

... and Spread Spectrum Systems K Fazel Marconi Communications GmbH Germany and S Kaiser German Aerospace Center (DLR) Germany Multi-Carrier and Spread Spectrum Systems Multi-Carrier and Spread Spectrum ... multi-carrier, spread spectrum and multi-carrier spread spectrum systems We hope that this book will contribute to a better understanding of the principles of multi-carrier and spread spectrum and ... 1.3 Spread Spectrum Techniques 1.3.1 Direct Sequence Code Division Multiple Access 1.3.2 Advantages and Drawbacks of DS-CDMA 1.3.3 Applications of Spread Spectrum 1.4 Multi-Carrier Spread Spectrum...

Ngày tải lên: 02/03/2013, 16:58

... D McGillem, Modern Communications and Spread Spectrum, McGraw-Hill, New York, NY, USA, 1986 457 [7] R E Ziemer and R L Peterson, Digital Communications and Spread Spectrum Systems, Macmillan, ... “Theory of spread- spectrum communications—a tutorial,” IEEE Trans Commun., vol 30, no 5, pp 855–884, 1982 [14] R E Ziemer and R L Peterson, Digital Communications and Spread Spectrum Systems, chapter ... signal processing for modems, and spread- spectrum systems His research interests include the areas of adaptive filtering, spread- spectrum communications, and power-line communications Recently he was...

Ngày tải lên: 23/06/2014, 00:20

... techniques in spread spectrum communications,” Proceedings of the IEEE, vol 76, no 6, pp 657–671, 1988 [3] F Hsu and A Giordano, “Digital whitening techniques for improving spread spectrum communications ... described model were run with the following parameters: the spreading factor/processing gain of the spread spectrum system was g p = 127 and the spread signal was oversampled by The filter bank was an ... Trans Communications, vol 26, no 2, pp 209–216, 1978 [4] J W Ketchum and J G Proakis, “Adaptive algorithms for estimating and suppressing narrow-band interference in PN spread- spectrum systems, ”...

Ngày tải lên: 23/06/2014, 01:20

... wideband spread spectrum cellular system,” July 1993 [44] TIA/EIA/IS-cdma2000, “Physical layer standard for cdma2000 spread spectrum systems, ” Aug 1999 [45] Turin G.L., “Introduction to spread- spectrum ... various multi-carrier-based communications standards for broadcasting, WLAN and WLL, are summarized in Tables 1-2 to 1-4 1.3 Spread Spectrum Techniques Spread spectrum systems have been developed ... of Spread Spectrum To illustrate the importance of the spread spectrum technique in today’s wireless communications we will briefly introduce two examples of its deployment in cellular mobile communications...

Ngày tải lên: 09/08/2014, 19:22

... PN spread spectrum systems, ” IEEE, Transactions on Communications, vol 30, pp 913–924, May 1982 [31] Kondo S and Milstein L.B., “On the use of multicarrier direct sequence spread spectrum systems, ” ... [47] Viterbi A.J., Spread spectrum communications – myths and realities,” IEEE Communications Magazine, pp 11–18, May 1979 [48] Viterbi A.J., CDMA: Principles of Spread Spectrum Communication Reading: ... control systems Different concepts for future air traffic control based on multi-carrier spread spectrum have been proposed [23][24] More potential application fields for multi-carrier spread spectrum...

Ngày tải lên: 09/08/2014, 19:22

... (L d0 − 1) 0 spreader c(0) spreader c(L − 1) serial-to-parallel converter (0) d0 L−1 user group (K d0 −L) spreader c(L − 1) spreader c(0) 1st data symbol per user + (K d0 − 1) L−1 spreader c(L ... for MC-CDMA systems in indoor environments,” IEICE Transactions on Communications, vol E79-B, pp 1351–1360, Sept 1996 [48] Vandendorpe L., “Multitone spread spectrum multiple access communications ... Rohling H., “On the duality of multi-carrier spread spectrum and single-carrier u transmission,” in Proc International Workshop on Multi-Carrier Spread- Spectrum (MC-SS’97), Oberpfaffenhofen, Germany,...

Ngày tải lên: 09/08/2014, 19:22

... mobile communications systems, ” European Transactions on Telecommunications (ETT), vol 10, pp 417–427, July/Aug 1999 [35] Sorger U., De Broeck I and Schnell S., “Interleaved FDMA – a new spread- spectrum ... Transactions on Telecommunications (ETT), vol 11, pp 605–610, Nov./Dec 2000 [23] Lindner J., “On coding and spreading for MC-CDMA,” in Proc International Workshop on Multi-Carrier Spread- Spectrum & Related ... Multi-Carrier Spread- Spectrum (MC-SS’97), Oberpfaffenhofen, Germany, pp 57–68, April 1997 [29] Sari H., “A review of multi-carrier CDMA,” in Proc International Workshop on Multi-Carrier SpreadSpectrum...

Ngày tải lên: 09/08/2014, 19:22

... performance in channels with large delay spread than in channels with low delay spread The reason for this effect is that a channel with a delay power density spectrum which matches more closely with ... channel estimation in multi-carrier systems is shown To evaluate and optimize the channel estimation, a multi-carrier reference scenario typical for mobile radio systems is defined The frequency band ... following The mobile radio channel used has a uniform delay power spectrum with τmax = 20 µs and a uniform Doppler power density spectrum with fD,max = 333.3 Hz In Figure 4-24, the mean square...

Ngày tải lên: 09/08/2014, 19:22

... band interference in PN spread- spectrum systems, ” IEEE, Transactions on Communications, vol 30, pp 913–924, May 1982 [44] Li Y., “Simplified channel estimation for OFDM systems with multiple transmit ... OFDM systems over fading channels,” IEEE Transactions on Communications, vol 48, pp 1596–1609, Sept 1999 [36] Kaiser S., “Trade-off between channel coding and spreading in multi-carrier CDMA systems, ” ... interference rejection in orthogonal multi-carrier spread- spectrum communications,” in Proc IEEE International Conference on Universal Personal Communications (ICUPC’94), San Diego, USA, pp 46–50,...

Ngày tải lên: 09/08/2014, 19:22

... 2G GSM system provides high mobility but a low data rate 3G systems provide similar mobility as Multi-Carrier and Spread Spectrum Systems K Fazel and S Kaiser  2003 John Wiley & Sons, Ltd ISBN: ... For high coverage areas with high delay spread, large spreading factors can be applied and for low coverage areas with low delay spread, the smallest spreading factor can be used In HIPERLAN/2, ... Two-dimensional spreading has a total spreading Multi-cell environment #6 Time spreading, Ltime Code (Synchronized) #5 Time #7 #2 #1 #3 #4 l na io ns e m di g o- din Tw rea sp Frequency spreading,...

Ngày tải lên: 09/08/2014, 19:22

... Global Telecommunications Conference (GLOBECOM’98), Communication Theory Mini Conference, Sydney, Australia, Nov 1998 References 231 [5] ETSI DAB (EN 300 401), “Radio broadcasting systems; digital ... required symmetrical or asymmetrical transmission capacity, and whether they Multi-Carrier and Spread Spectrum Systems K Fazel and S Kaiser  2003 John Wiley & Sons, Ltd ISBN: 0-470-84899-5 234 Additional ... demanded in order to maximize the area spectrum efficiency in a variety of communication environments The adaptation and integration of existing and new systems to emerging new standards would...

Ngày tải lên: 09/08/2014, 19:22

... (STTC) 237–238 UMTS 253 Spatial diversity 233 Spreading codes 52–54 PAPR 54, 184–185 Spreading length 34, 49, 55, 201 Spread spectrum 30–45 Spread spectrum multi-carrier multiple access (SS-MC-MA) ... Small Office/Home Office Soft Output Viterbi Algorithm Serial-to-Parallel (converter) Spread Spectrum Spread Spectrum Multi-Carrier Multiple Access Solid State Power Amplifier Space–Time Coding ... bit/s/Hz/cell or sector Spreading: operation of enlarging/spreading the spectrum Several spreading codes can be used for spectrum spreading Synchronous: users transmitting following a given time pattern...

Ngày tải lên: 09/08/2014, 19:22

... As a result, spectrum scarcity poses an imminent problem for the development of future wireless communication systems 2 The Federal Communications Commission (FCC) established the Spectrum Policy ... the spectrum utilization efficiency in certain spectrum bands On the other hand, the SR system may also obtain spectrum access by leasing unused spectrum from the PR system in a secondary spectrum ... Requests Radio A Base Station Spectrum Spectrum Manager Manager A3 Spectrum Requests Fig 1.7 Complete spectrum sharing in a multi-radio network 1.4 Research Motivation Spectrum scarcity poses an...

Ngày tải lên: 11/09/2015, 09:09

... với FHSS Ví dụ Direct Sequence Spread Spectrum Transmitter Direct Sequence Spread Spectrum Transmitter Direct Sequence Spread Spectrum Using BPSK Example Approximate Spectrum of DSSS Signal Vấn ... khe thời gian dùng để truyền khung Trải phổ nhảy tần Frequency Hopping Spread Spectrum     Frequency Hopping Spread Spectrum (FHSS) Được phát minh nữ diễn viên Hollywood Hedy Lamarr, Là kĩ ... k chíp mã tương ứng với từ tần số Trải phổ dãy trực tiếp Direct Sequence Spread Spectrum    Direct Sequence Spread Spectrum (DSSS) Sử dụng mã trải phổ băng rộng để điều chế tín hiệu sóng mang...

Ngày tải lên: 13/09/2012, 11:16

... Rights Reserved Spread Spectrum q Spread spectrum is a communication technique that spreads a narrowband communication signal over a wide range of frequencies for transmission then de-spreads it into ... Direct Sequence Spread Spectrum q Spread spectrum increases the bandwidth of the signal compared to narrow band by spreading the signal q There are two major types of spread spectrum techniques: ... Reserved Spread Spectrum Use q In the 1980s FCC implemented a set of rules making Spread Spectrum available to the public Cordless Telephones Global Positioning Systems (GPS) Cell Phones Personal Communication...

Ngày tải lên: 13/09/2012, 11:16

... đặc biệt để khắc phục ảnh hưởng nhiễu Hai khía cạnh đưa Shannon báo “A Maththemathical Theroy of Communication xuất năm 1948 Bell System Technical Journal - nơi đưa lý thuyết thông tin Shannon ... định lý quan trọng cho kỹ sư truyền thông Tài liệu tham khảo C E Shannon "A Mathematical Theory of Communication. " Bell System Technical Journal, Vol 27, 1948 Tất kỹ sư truyền thông phải đọc báo...

Ngày tải lên: 18/09/2012, 10:13

Ngày tải lên: 29/09/2013, 20:20