uplink only random access channel

... tương tự DIMM điểm tiếp xúc có xếp khác RDRAM xây dựng với hai kênh truyền thông riêng biệt (dual channel) , cho phép nâng tốc độ chuyển liệu lên tới 3.2Gbytes/giây Bộ nhớ RDRAM máy tính phải sử...

Ngày tải lên: 25/04/2013, 19:25

... insensitivity results from limited O2 access to the active site [16] Indeed, hydrophobic channels have been identified that may serve as pathways for gas access to the deeply buried active site ... gas channel participate in O2 resistance by blocking O2 access to the active site [25] To check this hypothesis, we replaced, by sitedirected mutagenesis, two amino acids that line the gas access ... capsulatus We used site-directed mutagenesis to modify two bulky residues lining the putative gas access channel in the large subunit HupV (Ile65 and Phe113 replaced by Val and Leu, respectively) After...

Ngày tải lên: 20/02/2014, 01:20

... [19], parallel channels subject to fading [20–22], and asynchronous multiple -access channels [23, 24], among others On the other hand, when dealing with coded scenarios over noisy channels, it ... networks using a multiple access channel, ” IEEE Transactions on Signal Processing, vol 55, no 3, pp 822–833, 2007 [25] Y Zhao and J Garcia-Frias, “Turbo compression/joint sourcechannel coding of correlated ... sources over AWGN channels,” IEEE Transactions on Communications, vol 53, no 4, pp 555–559, 2005 [28] W Zhong and J Garcia-Frias, “LDGM codes for channel coding and joint source -channel coding of...

Ngày tải lên: 21/06/2014, 07:20

... Queue Random arrivals Encoder X1 X2 + Y K XK Noise, Z Figure 1: Gaussian multiple -access channel with random arrivals PROBLEM FORMULATION 2.1 Channel and source model We consider a multiple -access ... buffered random access systems,” Advances in Applied Probability, vol 26, no 2, pp 498–515, 1994 [13] B Shrader and A Ephremides, “On the Shannon capacity and queueing stability of random access ... are transmitting over a noisy channel, we will also need multiuser source /channel separation Thus, the chances that full Shannon capacity region is achievable with only information about mean arrival...

Ngày tải lên: 21/06/2014, 23:20

... two-dimensional SPIHT, but without the random access capability to be enabled in our proposed algorithm Our proposed extension to three dimensions with random access decodability that retains spatial ... the minimum amount of bits spectral dimensions independently and random access decoding These properties are important to ease of access and processing of the data and were not introduced into ... descendants Coefficient (0, 0, 0), for example, has no descendants at all BLOCK CODING To provide random access, it is necessary to encode separately different areas of the image Encoding separately...

Ngày tải lên: 22/06/2014, 00:20

... Multiple access channels, Ph.D thesis, University of Hawaii, Honolulu, Hawaii, USA, 1972 [4] R Palanki, A Khandekar, and R McEliece, “Graph based codes for synchronous multiple access channels,” ... approach to the Gaussian multiple -access channel, ” IEEE Transactions on Information Theory, vol 42, no 2, pp 364–375, 1996 [2] R Ahlswede, “Multi-way communication channels,” in Proceedings of the ... erasure approximation of the state-check node, the real channel is mapped onto an erasure channel with same capacity The ternary erasure channel (TEC) used for the approximation has input distribution...

Ngày tải lên: 22/06/2014, 19:20

Ngày tải lên: 29/07/2014, 03:20

... been widely investigated: Ferroelectric Random Access Memory (FeRAM), Spin Torque Transfer Magnetoelectric Random Access Memory (STT-MRAM), Resistive Random Access Memory (RRAM), and PCRAM [20] ... volatile memories: Dynamic Random Access Memory (DRAM) and Static Random Access Memory (SRAM) DRAM is the most cost- and space-efficient memory because each DRAM cell consists of only one transistor ... SEMICONDUCTOR MEMORIES 1.2 PHASE CHANGE RANDOM ACCESS MEMORY 1.2.1 Phase-change materials 1.2.2 Principles of Phase change random access memory 10 1.2.3 RESET current...

Ngày tải lên: 09/09/2015, 10:07

... density, random access and non-vilatile memory (NVM), was introduced by Dr Arthur Pohm and Dr Jim Daughton at Honeywell, in 1984 [1] This new type of NVM was introduced as “magnetoresistive random access ... providing me with invaluable advices, directions, new viewpoints and teaching me about magnetic random access memory since the first day I joined Data Storage Institute (DSI) Randall, I am very grateful ... 13 2.3 Magnetic Tunnelling Junction (MTJ) Development 14 2.4 Magnetoresistive Random Access Memory (MRAM) 15 2.4.1 Field Switching MRAM: Scalable? 16 2.4.2 Spin Transfer...

Ngày tải lên: 09/09/2015, 10:14

... as well as endurance of the FLASH memory device Ferroelectric random access memory (FeRAM) and spin transfer torque magnetic random access memory (STT MRAM) are two NVM alternatives that may replace ... …………………………………………………………………… 128 Appendix A List of Publications ……………………………………………… 143 vi Abstract Phase change random access memory (PCRAM) is one of the most promising contender to replace FLASH memory PCRAM‟s ... xxiii Chapter Introduction 1.1 Non-volatile Memory Technology ……………………………….1 1.2 Phase Change Random Access Memory Technology ……………3 1.2.1 Phase change materials and device structures ……………3 1.2.2...

Ngày tải lên: 10/09/2015, 09:21

... components are Dynamic Random Access Memory (DRAM) and Static Random Access Memory (SRAM) DRAM is the most cost and space efficient memory because each DRAM cell consists of only one transistor ... Generally, three technologies have been widely investigated: Magnetoelectric Random Access Memory (MRAM), Ferroelectric Random Access Memory (FeRAM), and PCRAM (Bez, 2004) FeRAM has a sandwich structure ... other researchers, and serves as a useful reference Keywords: Semiconductor memory, phase change random access memory, chalcogenide material, physical limitation, nucleation and growth, scaling, integrated...

Ngày tải lên: 11/09/2015, 16:04

... including Magnetoresistive Random Access Memory (MRAM), Ferroelectric Random Access Memory (FeRAM), Phase-Change Random Access Memory (PCRAM), and Resistive Random Access Memory (RRAM) Each memory ... Resistive Random Access Memory Technology 5  1.2.1          Resistive Random Access Memory Device Structure and Switching Materials 5  1.2.2          Resistive Random Access ... this new topic The research on Resistive Random Access Memory could not have proceeded smoothly without their relevant experience in Phase Change Random Access Memory In addition, I want to thank...

Ngày tải lên: 02/10/2015, 17:13

... in fading channels is still unavailable Although the MLE proposed in AWGN channels [9] can be applied for fading channels if the channel state information (CSI) is known at the FC, it only considers ... the separate source -channel coding scheme is optimal in fading channels with orthogonal multiple -access protocols, which outperforms AF transmission, a simple joint source -channel coding scheme ... obtained from (42) uses the channel estimate as a “partial” CSI that accounts for the channel estimation errors The true value of the channel coefficients contained in the channel estimate corresponds...

Ngày tải lên: 18/06/2014, 22:20

... in fading channels is still unavailable Although the MLE proposed in AWGN channels [9] can be applied for fading channels if the channel state information (CSI) is known at the FC, it only considers ... the separate source -channel coding scheme is optimal in fading channels with orthogonal multiple -access protocols, which outperforms AF transmission, a simple joint source -channel coding scheme ... obtained from (42) uses the channel estimate as a “partial” CSI that accounts for the channel estimation errors The true value of the channel coefficients contained in the channel estimate corresponds...

Ngày tải lên: 20/06/2014, 04:20

... will not only remain for a long time, but define it Although, I can tell you I have done a lot of name changing in my life That being said, this is an interesting issue because not only you want ... word 'patient' in Patient Reported Outcomes He observed that 'patient' occurs in the titles of only 17 of 4,600 biomedical journals included in Medline A downside of Patient Reported Outcomes ... increasingly the cognoscenti talk of patient reported outcomes Trouble is – will clinicians who have only just come to terms with QoL understand that patient reported outcomes is essentially the same...

Ngày tải lên: 20/06/2014, 15:20

... Therefore, there are total N +1 channels, i.e., one direct transmission channel and N relay transmission channels, can be used to transmit information Suppose that the channel state information (CSI) ... applied to select one channel from the N + channels for transmission by the criterion of maximizing the output SNR at the receiver It should be noted that the direct transmission channel is also named ... analysis of the uplink multi-hop cellular system Initially, we derive the output SNR of each link, and then the outage probabilities of direct transmission channel and relay transmission channels are...

Ngày tải lên: 21/06/2014, 02:20

... case of a systematic channel code) and Ls − LU,k as extrinsic Secondly, we consider a typical O,k serial concatenation where only the (inner) channel decoder has access to the channel values It ... linear channel codes and symmetric channels Nevertheless, when the channel code is linear and the channel symmetric, FEXIT charts have at least two benefits Firstly, the FEXIT chart of the (inner) channel ... in Signal Processing Source coder Π U: Channel coder Π−1 Channel decoder R: the channel and source decoders in Figure are considered to be, respectively, Channel Source decoder Ls = Lc I,: O,:...

Ngày tải lên: 21/06/2014, 20:20

... be applied to (17) to evaluate the channel capacity of a UWB PPM system over frequency-selective channels Channel capacity over frequency-selective fading channels with a Rake receiver A Rake ... perspective The capacity was first derived for an AWGN channel and then extended to a fading channel by averaging the SNR over the channel random variables Both single and multiple user capacities ... single user and multiuser cases The receivers used for an AWGN channel can also be applied to multipath fading channels subject to the channel state information being fully available to the receiver...

Ngày tải lên: 21/06/2014, 22:20

... evaluate the performance of the proposed channel estimation technique for LTE uplink systems In simulations, the channel models given in [23] are used Only typical urban (TUx) and rural area (RAx) ... order to track the time-variations of the channel In [8] Modified Kalman filter- (MKF-) based time-domain channel estimation approach for OFDM with fast fading channels has been investigated The proposed ... approaches have been commonly used for channel estimation [10] In this paper, we focus on a major challenge, namely, the SC-FDMA transmission over time-varying multipath fading channels in very high...

Ngày tải lên: 21/06/2014, 22:20

... distributed in [0, 2π) and a j is the channel amplitude If a line-of-site (LOS) exists between the transmitter and the receiver, the channel amplitude is modeled as a Rician random variable [10] In this ... more channel diversity at the cost of lower minimum distance and worse channel estimation quality In Figure 8, we show the performance of the coded FHSS system over Rayleigh and Rician fading channels ... spread-spectrum multiple -access communications over fading channels,” IEEE Transactions on Communications, vol 30, no 5, part 2, pp 996–1009, 1982 [3] G Einarsson, “Coding for a multiple -access frequencyhopping...

Ngày tải lên: 21/06/2014, 23:20