NON-ORTHOGONAL MULTIPLE ACCESS

and Chenyang Yang11School of Electronics and Information Engineering, Beihang University, Beijing 100191, ChinaEmail: Xin Wang∗- athody@vip.sina.com; Chenyang Yang - cyyangbuaa@vip.sina.com;∗Corresponding authorAbstractWe study optimal and suboptimal decentralized estimators in wireless sensor netwo[r]

and Chenyang Yang11School of Electronics and Information Engineering, Beihang University, Beijing 100191, ChinaEmail: Xin Wang∗- athody@vip.sina.com; Chenyang Yang - cyyangbuaa@vip.sina.com;∗Corresponding authorAbstractWe study optimal and suboptimal decentralized estimators in wireless sensor netwo[r]

Hindawi Publishing CorporationEURASIP Journal on Advances in Signal ProcessingVolume 2008, Article ID 476125, 15 pagesdoi:10.1155/2008/476125Research ArticlePower and Resource Allocation for Orthogonal MultipleAccess Relay SystemsWessam Mesbah and Timothy N. DavidsonDepartment of Electrical a[r]

| > 0, ∀i = j, and thus, CDMA is a non-orthogonal multiple access scheme. However,CDMA has other advantages as we shall see.1.1.4 Traffic Engineering and Trunking EfficiencyThe previous discussion focused on the number of channels supported by a specific system.Howev[r]

Hindawi Publishing CorporationEURASIP Journal on Wireless Communications and NetworkingVolume 2010, Article ID 395763, 10 pagesdoi:10.1155/2010/395763Research ArticleA Novel Method for Improving Fairness overMultiaccess ChannelsSeyed Alireza Razavi and Ciprian Doru Giurc˘aneanuDepartment of Signal P[r]

hand, the capacity is not fixed but is limited by the interference between users. Such asystem is said to have a ‘soft’ capacity limit, since excess users may be allowed accessat the expense of increased interference to all users. In general, the capacity in Pseudo-Orthogonal (PO) or Asynchron[r]

1The Generalized CDMA1.1 IntroductionOne of the basic concepts in communication is the idea of allowing several transmittersto send information simultaneously over a communication channel. This concept isdescribed by the terms multiple access and multiplexing.Thetermmultiple access<[r]

In this paper, we propose a new transceiver architecturewith the capabilities of signal separation and interferencecancellation of MIMO-OFDM, in a virtual MIMO schemecombined with OFDM and space-time coding at the tr ans-mit nodes. At the receive nodes, multiple antennas are usedto separate t[r]

distortion.10.3 TIME DIVISION MULTIPLE ACCESS AND TIME DIVISIONMULTIPLEXINGA TDMA or time division multiplexing (TDM) system uses a single frequency bandto simultaneously transmit many signals (channels) in allocated time slots. Thesedifferent channels time-share the same frequency ban[r]

storage delivery architecture, e.g. , Nirvanix SDN [7],file data needs to be efficiently moved across loca-tions and be accessible using standard file system APIs.Moreover, for data-intensive applications to functionseamlessly in “compute clouds”, the data needs to becached closer to or at the site of[r]

that signals propagate from transmitter to receiver through multiple paths, which can addat the receiver constructively or destructively depending on the relative signal phases.The received signal is said to be in a deep fade when the paths add destructively in amanner that the received signa[r]

Bước tiến đầu tiên của công nghệ truy cập vô tuyến WCDMA là đưa ra HSDPAtrong phát hành R5 và HSUPA trong phát hành R6 gọi chung là HSPA. Mặt dù truyềndẫn dữ liệu gói đã từng được hỗ trợ trong phát hành đầu tiên của chuẩn WCDMAnhưng HSDPA đã đem lại những tiến bộ xa hơn trong việc cung cấp các dịch[r]

7The Air-Interface of GSMThe Air-interface is the central interface of every mobile system and typicallythe only one to which a customer is exposed.The physical characteristics of the Air-interface are particularly importantfor the quality and success of a new mobile standard. For some mobile system[r]

−1AB is real and diagonal.When (as is the case in most applications) we have to do with real matrices, then instead of unitary andHermitian matrices, we have to do with orthogonal and symmetric matrices, respectively.8Just by looking.9The λ has been replaced by λ1, because we are interested i[r]

the system, namely, the minimum SD bandwidth provision needed to trackthe SI QoS thresholds.264 Ulla Birnbacher, Wei Koong ChaiFig. 8.14: Aggregation of VoIP and Video. Average SD bandwidth provision. Seereference [21]. Copyrightc2005 IEEE.8.5 QoS provisioning for terminals supporting dualnetwork <[r]

k th user’s spreading vectork th user’s normalized spreading vectorith interval channel coefficient matrixmatrix with S and Ci multiplied togetherdata vectornoise vectorreceived signal vectortransposeHermitian transposecomplex conjugatedeterminant operatortrace operatorargument contributes to the mt[r]

service launched in Japan in February 1999, which runs over PDC-P, the packet overlayto the Japanese 2G PDC system. At the time of writing, quite a few GSM operators havelaunched GPRS services, and most of those who have not are in the process of doingso. Unfortunately, we are not yet in a position[r]

the current tariff ideology. The tariff structure of telephone calls does not provide re-semblance to the real cost involved. The highest costs are incurred in the local loop and isproportional to the distance of the subscriber to the distribution point. This would meanthat a call coming from a rura[r]

Verizon dropped by almost 3 percent during 2001, or morethan 2.5 million lines. Verizon attributes the decline in thenumber of access lines in part to the shift to wireless phones.Nationwide, by year-end 2001, wireless had displaced anestimated 10 million access lines, primarily by con[r]

a suite of Base Stations. On the forward path, the Host Unit receives the RF signal from the BTS and digitizes the designated RF band and digitally transports it over single mode fiber or a Millimeter Wave link to the Remote Unit. On the reverse path, the Host Unit receives the digitized RF signal f[r]