error control coding channel access and detection algorithms

... paper, “Joint decoding of concatenated VLEC and STTC system,” Chen and Cao proposed a joint sourcechannel coding scheme for wireless fading channels, which combines variable length error correcting ... RS codes, syndrome-less decoding algorithms require more field oper- ations and have higher hardware costs and lower throughput, when compared to syndrome-based decoding algorithms They also derived ... (VLECs) and space time trellis codes (STTCs) to provide bandwidth efficient data compression, as well as coding and diversity gains At the receiver, an iterative joint source and space time decoding...

Ngày tải lên: 21/06/2014, 23:20

... nearest-codeword decoding for short block codes, algebraic decoding for Reed-Solomon and BCH codes, and Viterbi decoding or sequential decoding for convolutional codes; (2) iterative decoding algorithms, ... in error control coding and applications, multiple access communications, digital communications, and analog and digital implementations of communications systems He is the author of Trellis Coding ... iterative error control decoding and coding techniques 14 Christian Schlegel received the Dipl El Ing ETH degree from the Federal Institute of Technology, Zurich, in 1984, and the M.S and Ph.D...

Ngày tải lên: 22/06/2014, 22:20

... 33 Channel Estimation and Detection for MIMO systems 4.1 Decouple Maximum Likelihood (DEML) 4.2 Channel estimation and Detection for quasi-static flat fading 34 34 channels ... the channel On the other hand, if the channel possesses a constant gain and linear phase response over a bandwidth that is smaller than the bandwidth of the transmitted signal, then the channel ... 40 4.3.2 Channel estimation 44 4.3.3 Symbol Detection 44 Channel estimation and detection for flat fast fading channels 46 4.4.1 Sytem...

Ngày tải lên: 03/10/2015, 11:37

... proposed that concern congestion and error control for such environments Following the discussion on IP multicast, Chapter presents congestion and error control schemes and algorithms operating at the ... duplicated segments Error control in TCP is achieved by using a version of the Automatic Repeat reQuest (ARQ) error control protocols operating at DLL and it involves both error detection and retransmission ... are two approaches for doing flow control: Stop -and- Wait flow control Sliding-Window flow control In the Stop -and- Wait flow control the sender transmits a frame and waits for ACK (Figure 2.4(a))...

Ngày tải lên: 26/10/2013, 17:15

... effectiveness increase of algorithms for moving objects detection and tracking For this, we use additive minimax similarity function, which possessing the advanced qualitative characteristic and in comparison ... frames In real video, the matching has to deal with false detections due to noise and to errors with objects in the scene which stop and resume moving, or may become partially occluded Therefore ... effectiveness increase of algorithms for moving objects detection and tracking For this, we use additive minimax similarity function, which possessing the advanced qualitative characteristic and in comparison...

Ngày tải lên: 22/03/2014, 11:20

... destination with the true channel parameters replaced by estimates The channel gains h0 and h2 and noise variances N0 and N2 are estimated at the destination, while estimates of h1 and N1 , computed ... symbol error rate (QPSK) and more decoding errors (8-PSK) than in the case of BPSK From (28) and (29), one notices that the a posteriori expectation of the symbol vectors sent by both source and ... relay-destination channel coefficients are denoted h0 , h1 , and h2 , respectively EURASIP Journal on Wireless Communications and Networking Considering the channel model, the output of the different channels...

Ngày tải lên: 21/06/2014, 17:20

... considered and random access control is modeled as a utility maximization problem in [15] In addition, the cross-layer optimization problem of random access control and transmission control protocol ... probability was used and opportunity of time varying and adaptive control was ignored 3 On the other hand, queue-based random access algorithms were studied in [18], where access probabilities ... adapting channel access, modulation, and coding according to the queue size and quality of the time-varying channel We show that the optimal transmission policy has a threshold structure versus the channel...

Ngày tải lên: 21/06/2014, 17:20

... between the proposed algorithm and the channel estimator [14]; wherein the uplink channel over the whole frequency band is reconstructed with the aid of estimated subband channel transfer functions ... and the FFT demodulated signals at the subcarrier k of the ith OFDMA symbol can be rewritten as u(i, k) Q Subband Subband ··· Whole frequency band of OFDMA Information sequence in subband ... order Q to model the LTV channel (maintain a tight channel model), and the least order should be satisfied Q/2 ≥ fd Ω/ fs , where fd and fs are the Doppler frequency and sampling rate, respectively...

Ngày tải lên: 21/06/2014, 23:20

... dimensions independently and random access decoding These properties are important to ease of access and processing of the data and were not introduced into SPIHT previously Coding different areas ... resolution and 1/4 for spatial resolution (c) is full spectral resolution and 1/4 spatial resolution (d) is full spatial resolution and 1/8 spectral resolution 6.4 ROI coding and selected decoding ... 85995 (lspec = and lspat = 5) if the given coefficient has both spectral and spatial descendants Coefficient (0, 0, 0), for example, has no descendants at all BLOCK CODING To provide random access, it...

Ngày tải lên: 22/06/2014, 00:20

... multiuser longcode CDMA MIMO system Sections and are devoted to the synthesis of multiuser MIMO channel estimation techniques and of MIMO multiuser detection algorithms, respectively In Section the ... data error probability If, instead, the data symbols have been detected with a large error probability, we expect that the new channel estimate will be worse than the previous one and an error ... bits are randomly generated and used to generate the discrete-time vectors r(1), , r(B); then, random errors with probability p(e) are introduced on the Nt (B − T) information bits and, after...

Ngày tải lên: 22/06/2014, 22:20

... in channel estimation and data detection (a) perfectly known channel parameters and interference statistics, with one-vector-symbol (curve 1) and twovector-symbol (curve 2) detection; (b) channel ... estimated channel and correlation of I + N One interferer, estimated channel and assumed white I + N Two interferers, estimated channel and correlation of I + N Two interferers, estimated channel and ... without estimates of channel and spatial interference correlation matrices, iterative MMSE detection cannot be performed 5.4 (33) Data detection without estimating channel and interference Simulation...

Ngày tải lên: 23/06/2014, 01:20

... gene id (gene), mean and standard deviation of the unnormalised log ratio (M and SD), mean and standard deviation of the LOESS normalised log ratio (M LOESS and SD LOESS) and the number of methods ... contains the gene id (gene), mean and standard deviation of the unnormalised log ratio (M and SD), mean and standard deviation of the LOESS normalised log ratio (M LOESS and SD LOESS), the number of ... genes Correlation between channels Dye filter Reset dye filter for each slide Channel variation Gene × Dye Error filter Reset error filter for each slide Random noise standard deviation Tail behaviour...

Ngày tải lên: 14/08/2014, 13:22

... its transmission on channel 2, because initially only channel and are available Then at T1 a PU arrives at channel and the SU which has to leave the channel, switches to channel 1, but after ... exclusive access rights to the allocated spectrum within the specified geographical area, and the SUs opportunistically access and utilize the spatially and temporary unused frequency bands known ... letters) N and R Set of all natural and real numbers, respectively N and N The set of subcarriers and the number of subcarriers, respectively So, N = {1, , N } and |N | = N K and K The set...

Ngày tải lên: 09/09/2015, 10:19

... their love and encouragement My parents raised me and supported me in my pursuits And most of all, my loving wife Linlin Miao was always there cheering me up and stood by me through good and bad ... members, help from friends, and support from my family and my wife First and foremost I would like to express my deepest gratitude to my supervisors Associate Professor Hui Ji and Professor Defeng Sun ... learning based image restoration and recognition, dictionary learning algorithms and proximal methods 4 Introduction 1.1.1 Dictionary learning for image restoration and recognition In this section,...

Ngày tải lên: 09/09/2015, 11:26

... Page Channel Strategy and Plan Taxes Net Profit 4.4 Channel Pros and Cons [Insert Channel Pros and Cons table here.] [Example] Channel Pros Cons Channel A Channel B Channel C COMPETITORS' CHANNEL ... [Describe channel schema.] [Insert channel schema here.] Effective [mm/dd/yyyy] Version [x.x] Page Channel Strategy and Plan 4.1 CHANNELS ASSESSMENT Channels Available [Insert list of all available channels ... [mm/dd/yyyy] Version [x.x] Page Channel Strategy and Plan DOCUMENT ACCEPTANCE and RELEASE NOTICE This is [release/version] [0.0] of the Channel Strategy and Plan The Channel Strategy and Plan is a managed...

Ngày tải lên: 24/10/2012, 14:05

... Hsr and Hrd are estimated independently, so the channel estimation errors, ∆Hsr and ∆Hrd , are independent Remark 1: In general, the expressions of Ψsr , Σsr , Ψrd and Σrd depend on specific channel ... transmit and re- ceive antennas correlation matrices at the source and the relay, respectively, and σe,sr is the source-relay channel estimation error variance Similarly, RT,rd , RR,rd and σe,rd ... However, perfect channel estimation is difficult to achieve in practice, due to limited training and time-varying nature of wireless channels Channel estimation errors generally exist and the formulation...

Ngày tải lên: 20/11/2012, 11:31

... functionality of the C standard library’s strtok() function, which extracts “tokens” from a string The string is split using a set of delimiters, such as whitespace and punctuation Each piece ... into two parts: finding the beginning of the token (the first character that is not a delimiter), and finding the end of the token (the next character that is a delimiter) The first call of strtok() ... tokenized, delims is a string containing all the single characters to use as delimiters (e.g " \t\r\n"), and the return value is the first token in str Additional tokens can be obtained by calling strtok()...

Ngày tải lên: 25/04/2013, 08:07

... functionality of the C standard library’s strtok() function, which extracts “tokens” from a string The string is split using a set of delimiters, such as whitespace and punctuation Each piece ... ( a r r [ i ] < a r r [ i −1]) shift element ( i ); } Re-implement this function using pointers and pointer arithmetic instead of array indexing Use the shift element() function you implemented ... implementation: /∗ i t e r a t e u n t i l out−o f −o r d e r e l e m e n t found ; s h i f t t h e element , and c o n t i n u e i t e r a t i n g ∗/ void i n s e r t i o n s o r t ( void ) { i n t ∗ pElement...

Ngày tải lên: 25/04/2013, 08:07

... traversal) (f) Write test code to illustrate the working of each of the above functions All the code and sample outputs should be submitted Answer: Here’s one possible implementation: #include

Ngày tải lên: 25/04/2013, 08:07

... CHAPTER ■ DATA ACCESS AND NETWORKING EventHandler(service_GetHandsCompleted); service.GetHandsAsync(); } void service_GetHandsCompleted(object sender, GetHandsCompletedEventArgs ... AspNetCompatibilityRequirementsMode.Allowed)] public class StartingHandService { [OperationContract] public List GetHands() { return StartingHands.GetHands(); } // Add more operations here and mark them // with [OperationContract] ... template column containing the two cards in the hand and two text columns containing the nickname and notes about the hand 146 CHAPTER ■ DATA ACCESS AND NETWORKING

Ngày tải lên: 05/10/2013, 03:20