space division multiple access in mobile communication
Báo cáo hóa học: " Bounds on the Outage-Constrained Capacity Region of Space-Division Multiple-Access Radio Systems" docx
... regionshould increase linearly in each dimension as ρ increases lin-early in dB. As a result, we would also expect the outage ca-pacity region to increase linearly in each dimension as ρ in- creases. ... sinceone mobile may transmit at any time. A tighter inner boundmay be obtained by allowing the two mobiles to transmit si-multaneously, but without the coordinating virtual centralprocessing ... Signal Processing 2004:9, 1288–1298c 2004 Hindawi Publishing CorporationBounds on the Outage-Constrained Capacity Regionof Space- Division Multiple- Access Radio SystemsHaipeng JinCenter for...
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Application of programmable DSPs in mobile communications 2002
... to Summon Information 38019.6 Pointing to the Real World 38019.7 Pointing Greatly Simplifies the User Interface 38119.8 Uses of Pointing 38219.9 Software Architecture 38219.9.1 Introduction ... DSP in the Pointing System 38319.11 Pointing Enhanced Location Applications 38419.11.1 Pedestrian Guidance 38519.11.2 Pull Advertising 38619.11.3 Entertainment 38619.12 Benefits of Pointing ... Personal Mobile GatewayTM(IXI Mobile Inc.) the following steps must be performed to reverse each of the corresponding steps in thetransmitter:† De-multiplexing of transport channels† De-interleaving...
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hsdpahsupa for umts high speed radio access for mobile communications
... mobility. Terminals moving fast in a dense network wouldnecessitate a lot of cell updates, increasing the RACH load, but would then need to bepaged in multiple cells in case of downlink-originated ... notretained, and to allow reordering to be done for single packet streams the reorderingfunctionality needs to be combined with macro-diversity combining in MAC-es. Thus,the new MAC-es in- sequence ... rate of 384 kbps both in downlink and in uplink. The initial terminals and networkswere limited to 64–128 kbps in uplink while the latest products provide 384-kbps uplink.1.2 HSPA standardization...
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Báo cáo hóa học: " Research Article The Displacement of Base Station in Mobile Communication with Genetic Approach" potx
... computational model inspired by evolution.It represents feasible solutions in terms of individuals withgenomes, and determines which individuals could survive in a certain criterion formulated ... planning. In [2], a binarystring representation, the classic representation method ofgenetic algorithm, is applied. That is, candidate solutions areencoded as chromosome-like bit strings. In ... toexplain how the GA works. According to the schema theo-rem, short, low-order, and above-average schemata receiveexponentially increasing trials in subsequent generations.This proves that the individuals...
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Báo cáo hóa học: " Research Article Observations on Power-Efficiency Trends in Mobile Communication Devices" ppt
... The values in the table have been determined for a solution using turbodecoding and they do not include chip-le vel decoding andsymbol level combining that further increase the processingneeds.The ... anything in between 1-2 cycleinstruction set extensions and peripheral devices executingthousands of cycles can result in grossly inefficient software.If the interrupt latency in the operating ... hardware interrupt5, 6= interrupt service and acknowledge interrupt to HW9, 10= high-priority running due to interrupt1, 12= interrupted low-priority taskFigure 6: Controlling an accelerator interfaced...
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Báo cáo hóa học: " Iterative Pilot-Layer Aided Channel Estimation with Emphasis on Interleave-Division Multiple Access Systems Hendrik Schoeneich and Peter Adam Hoeher" docx
... estimation schemes suitable for interleave -division multiple access (IDMA) systems are presented. Training and dataare superimposed. Training-based and semiblind linear channel estimators are derived ... “Adaptive interleave -division multiple access a potential air interface for 4G bearer ser-vices and wireless LANs,” in Proceedings of the 1st IFIP Inter-national Conference on Wireless and Optical CommunicationsNetworks ... “Adaptive 4G up-link proposal based on interleave -division multiple access, ” in Proceedings of General Assembly of International Union of RadioScience (URSI ’05), New Delhi, India, October 2005.[12]...
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Code Division Multiple Access CDMA pdf
... 642.8 Multiple Access Performance of Frequency-HoppedCode Division Multiple Access 672.9 Summary 713. Cellular Code Division Multiple Access 733.1 Principles of Cellular Code Division Multiple ... techniques such as time division multiple access and frequency division multiple access. Additionally, random access schemessuch as carrier sense multiple access are examined. In Chapter 2, basic ... causing interference to another user. The orthogonality can be createdeither in the time domain or in the frequency domain. In TDMA, users simply transmit atdifferent times, thus maintaining...
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RECENT DEVELOPMENTS IN MOBILE COMMUNICATIONS – A MULTIDISCIPLINARY APPROACH Edited by Juan pdf
... including a provision to compensate subscribers in case of delay in porting or abuse of porting by them or on their behalf. 4.2.3 Mobile termination charges Call termination charges into mobile ... performance indicator chosen in this study for the mobile communications industry. 5.1.1.1 Productivity Productivity of service industries and especially mobile communications is hard to define. Indeed, ... these findings can’t be compared with findings in previous studies on mobile telecommunications, since most of them do not consider this performance indicator. Only very few studies examine the...
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Code Division Multiple Access (CDMA) phần 1 doc
... techniques such as time division multiple access and frequency division multiple access. Additionally, random access schemessuch as carrier sense multiple access are examined. In Chapter 2, basic ... 15:54viContents1. Multiuser Communications 11.1 Conflict-Free Medium Access Control 21.1.1 Time Division Multiple Access 31.1.2 Frequency Division Multiple Access 51.1.3 Code Division Multiple Access 61.1.4 ... 642.8 Multiple Access Performance of Frequency-HoppedCode Division Multiple Access 672.9 Summary 713. Cellular Code Division Multiple Access 733.1 Principles of Cellular Code Division Multiple...
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Code Division Multiple Access (CDMA) phần 2 doc
... forCode 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 to communicate. In ... and fading channels as well as their multiple access capabilities.Both techniques rely on spreading waveforms to accomplish pseudo-random spreading. A keyto CDMA is defining multiple spreading ... exploited to provide multiple access. In multiple access systems, we are concerned1Some make a distinction between CDMA and SSMA in that CDMA specifically designs its spreading waveformsto have...
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