DIRECT SEQUENCE SPREAD SPECTRUM

EURASIP Journal on Applied Signal Processing 2003:12, 1210–1218c 2003 Hindawi Publishing CorporationNonstationary Interference Excision in Time-FrequencyDomain Using Adaptive Hierarchical LappedOrthogonal Transform for Direct SequenceSpread Spectrum CommunicationsLi-ping ZhuDepartment[r]

EURASIP Journal on Wireless Communications and Networking 2005:3, 447–458c 2005 J. A. L. In´acio et al.New PN Even Balanced Sequencesfor Spread-Spectrum SystemsJ. A. L. In´acioInstituto de Engenharia de Siste mas e Computadores (INESC), Rua Alves Redol 9, 1000 Lisboa Codex, PortugalEN[r]

2.4835 GHz. The United States has 11 channels, and each channel is 22-MHz wide. Somechannels overlap with others and cause interference. For this reason, channels 1, 6, and 11are most commonly used because they do not overlap. In fact, many consumer-grade wire-less devices are hard set so you can ch[r]

portable phones. Found in cordless technology that is deployed in homes or business.dipole See rubber duck.directional antenna Mounted on a wall. Its radiation pattern is focused in a certain direction.Direct Sequence Spread Spectrum (DSSS) The modulation technique used b[r]

ξ3.2. Các phương thức trải phổ•Trải phổ trực tiếp: –DSSS (Direct Sequence Spread Spectrum)–Công nghệ CDMA hoạt động theo phương thức DSSS•Trải phổ nhảy tần: –FHSS (Fryquency Hopping Spread Spectrum)•Trải phổ nhảy thời gian: –THSS ( Time Hopping Spread[r]

throughput can suffer significant loss with an inappropriatechoice of carrier sense threshold [9]. Zhu et al. reported thata tunable sensing threshold can effectively leverage the spa-tial reuse of WLAN [10]. Zhai and Fang found that the op-timal carrier sensing threshold of WLAN for one-hop flowsdoes n[r]

wireless communication networks are facing much more sig-nificant challenges compared to their data network counter-parts.Direct sequence spread-spectrum system, also knownas code-division multiple access (CDMA), was historicallydeveloped for secure communication and milit[r]

EURASIP Journal on Applied Signal Processing 2004:8, 1163–1176c 2004 Hindawi Publishing CorporationFilter-Bank-Based Narrowband Interference Detectionand Suppression in Spread Spectrum SystemsTobias Hidalgo StitzInstitute of Communications Engineering, Tampere University of Technology[r]

Hindawi Publishing CorporationEURASIP Journal on Wireless Communications and NetworkingVolume 2007, Article ID 14916, 9 pagesdoi:10.1155/2007/14916Research ArticleInterference Excision in Spread Spectrum CommunicationsUsing Adaptive Positive Time-Frequency AnalysisSridhar Krishnan and[r]

RESEARCH Open AccessA new time-hopping/direct-sequencebiorthogonal PPM UWB communication systemYe-Shun Shen1, Fang-Biau Ueng2and Li-Der Jeng3*AbstractIn order to increase the capacity and diminish the multiple access interference (MAI) of an ultra-wideband (UWB)system, we propose a new time-h[r]

a unique ID known as a digital fingerprint [1] is embeddedinto the content assisted by a watermarking technique beforedistribution. When a suspicious copy is found, the owner canidentify illegal users by extracting the fingerprint.Since each user purchases contents involving his ownfingerprint, the fing[r]

number of system configurations adapted to pratical trans-mission scenarios, and chosen in real time by the online mo-dem.ACKNOWLEDGMENTSThe authors would like to thank the anonymous reviewersfor their insightful comments. This paper h as been presentedin part at the IEEE Global Communications Confer[r]

15.9.1 Story Drift CalculationsAll displacements produced by the response spectrum method are positive numbers.Therefore, a plot of a dynamic displaced shape has very little meaning since eachdisplacement is an estimation of the maximum value. Inter-story displacements areused to estimate dam[r]

Page 11Compressional Waves Mechanical waves can be eithertransverse or compressional. In a compressional wave, matterin the medium moves forward and backward along the samedirection that the wave travels. You can make a compressionalwave by squeezing together and releasing several coils of a coileds[r]

A field investigation was carried out at college farm, Professor Jayashankar Telangana State Agricultural University, Rajendranagar, Hyderabad during 2014-15 and 2015-16 with five tillage treatments CT (transplanted), CT (transplanted), CT (direct-seeded), ZT (direct-seeded) and ZT+R (direct-seeded)[r]

4. Ex : The man called the police. His car was stolen. Whose car => The man Whose car was stolen called the police. Ex : I know a girl. Her brother is a movie star. Whose brother=>I know a girl Whose brother is a movie star. Ex:The people were friendly.we bought their house. whose ho[r]

Hindawi Publishing CorporationEURASIP Journal on Wireless Communications and NetworkingVolume 2006, Article ID 56849, Pages 1–10DOI 10.1155/WCN/2006/56849Multiuser Interference Mitigation in NoncoherentUWB Ranging via Nonlinear FilteringZafer Sahinoglu1and Ismail Guvenc21Mitsubishi Electric Research[r]

power. Therefore, we will combine the positive- and negative-frequencyphasors coherently, using the methods described in Fig. 2-2 and employedelsewhere, to get a positive-frequency sine wave or cosine wave at fre-quency (k) and phase θ(k ) from 1 ≤ k ≤ N/2 − 1. We then have a truesignal that has ave[r]

Hindawi Publishing CorporationEURASIP Journal on Information SecurityVolume 2008, Article ID 803217, 15 pagesdoi:10.1155/2008/803217Research ArticleNovel Attacks on Spread-Spectrum FingerprintingHans Georg SchaathunDepartment of Computing, University of Surrey, Guildford, Surrey GU2 7X[r]

trial purposes. In the future, hardlyanyone will escape being involved, insome or the other way, with spread-spectrum communications.Commercial applications forspread spectrum range from wirelessPC-to-PC local area networks (LANs) D. PRABAKARANon spread spectrum c[r]