... 642.8 MultipleAccess Performance of Frequency-Hopped Code DivisionMultipleAccess 672.9 Summary 713. Cellular CodeDivisionMultipleAccess 733.1 Principles of Cellular CodeDivisionMultiple ... time division multipleaccess and frequency divisionmultiple access. Additionally, random access schemessuch as carrier sense multipleaccess are examined. In Chapter 2, basic spread spectrum techniques ... Spectrum Techniques for Code DivisionMultiple Access In the previous chapter, we reviewed the basic concepts of multiuser communications and the multiple accesstechniques used to allow multiple...
... Conflict-Free Medium Access Control 21.1.1 Time DivisionMultipleAccess 31.1.2 Frequency DivisionMultipleAccess 51.1.3 CodeDivisionMultipleAccess 61.1.4 Traffic Engineering and Trunking Efficiency ... 642.8 MultipleAccess Performance of Frequency-Hopped Code DivisionMultipleAccess 672.9 Summary 713. Cellular CodeDivisionMultipleAccess 733.1 Principles of Cellular CodeDivisionMultiple ... Summary 222. Spread Spectrum Techniques for CodeDivisionMultipleAccess 232.1 Forms of CodeDivisionMultipleAccess 232.2 Direct Sequence CodeDivisionMultipleAccess 242.2.1 Power Spectral...
... designedby using digital modulation techniques at the transmitter (including both sourcecoding and channel error-correcting coding) and the corresponding signal pro-cessing techniques at the ... resistance to signal interference from multiple trans-mission paths and potentially higher bandwidth efficiency inmultiple access communication than in other technologies. In the beginning of this chapter ... simplex channels.Frequency divisionmultipleaccess (FDMA) and time divisionmultiple access (TDMA) are the two major accesstechniques used to share the available band-width in a conventional mobile...
... article “Polarization DivisionMultipleAccess With Polarization Modulation for LOS Wireless Communications” by Bin Cao, Qin-Yu Zhang, and Lin Jin discusses a potential multipleaccess and modulation ... and efficient wireless accessin challenging interference scenarios, for example, multiple networks deployed in the same geographical area and sharing a common band. In 1976, an ALOHA channel ... carrier frequency offset (CFO) estimation in the uplink of multiuser multiple- input multiple- output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Conventional maximum likelihood...
... H. Mahadevappa and J. G. Proakis, “Mitigating multiple access interference and intersymbol interference in uncodedCDMA systems with chip-level interleaving,” IEEE Transac-tions on Wireless Communications, ... estimation schemes suitable for interleave -division multipleaccess (IDMA) systems are presented. Training and dataare superimposed. Training-based and semiblind linear channel estimators are derived ... “Adaptive interleave -division multipleaccess 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...
... 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. ... Signal Processing 2004:9, 1288–1298c 2004 Hindawi Publishing CorporationBounds on the Outage-Constrained Capacity Regionof Space -Division Multiple- Access Radio SystemsHaipeng JinCenter for ... prevents us from obtaining closed-form expressions for multiple- mobile cases similar to those shown in (A.2)and(35).4. NUMERICAL RESULTSThe bounding techniques introduced in the previous sectionwill...
... large bandwidth.This spreading occurs by combining the transmitter signal with a spreading sequence. Code DivisionMultipleAccess (CDMA) (1) Multiple AccessTechniques for Wireless Communications2005/07/06Weng ... Wireless Access Tech. Lab.Packet Radio (1) In packet radio (PR) access techniques, many subscribers attempt to access a single channel in an uncoordinated (or minimally coordinated manner.Collision ... user. Code DivisionMultipleAccess (CDMA) (4) Wireless Access Tech. Lab.CCU Wireless Access Tech. Lab.Packet Radio Protocols , vulnerable period is defined as the time interval during...
... and Kumar in their seminalwork regarding capacity in wireless networks, [26], or otherresearchers [27]. In more detail, under the original TSMA policy proposedby Chlamtac and Farago in [14], ... system throughput is required in a small numberof frames since the beginning of the network operation). Thisinteresting case is demonstrated using simulation results in the sequel.4.1. Simulation ... data are forwardedtowards a cer tain destination in the network (the sink node),while in ad hoc networks the destination of the data can beany node. Depending on the particular ad hoc and sensor...
... mainly point-to-point traffic, another attractive feature of light-trees isthe inherent capability for performing multicasting in the optical domain (as opposed to performingmulticasting at a higher ... the increased complexity of the problem and yetproduce good solutions. In the following we summarize the recent work on multicasting in optical networks, but the reader should keep in mind that ... multicasting in wavelength routed opticalnetworks were first demonstrated in [24]. Specifically, it was shown that using light-trees (spanning the source and destination nodes)rather than individual...