digital communications modulation and coding course

... theorem and aliasing Uniform and non-uniform quantization Lecture 13 29 Course summary – cont’d Channel coding  Linear block codes (cyclic codes and Hamming codes)  Encoding and decoding structure ... Sample 28 Channel Digital modulation Course summary – cont’d  In details, we studies: Basic definitions and concepts   Signals classification and linear systems Random processes and their statistics ... Bandwidth efficient modulation schemes  Offset QPSK (OQPSK) and Minimum shift keying   M-QAM   Bandwidth efficient and constant envelope modulations, suitable for non-linear amplifier Bandwidth

Ngày tải lên: 30/03/2014, 10:20

... on channel conditions [3-5]. Adaptive modulation and coding (AMC) is a term used in wireless communications to denote the matching of the modulation and coding to the channel condition for each ... International Symposium on Circuits and Systems (ISCAS),... adaptive modulation and coding; BS: base station; LT: lower bound of total utility; MCS: modulation and coding scheme; MSS: mobile ... Access Systems IEEE standard 802.16-2004 (2004) 5 JG Andrews, A Ghosh, R Muhamed, Fundamentals of WiMAX: Understanding Broadband... branch and bound method is effective and suitable for BS

Ngày tải lên: 21/06/2014, 02:20

... Experimental Evaluation of Adaptive Modulation and Coding in MIMO WiMAX with Limited Feedback ă Christian Mehlfuhrer, Sebastian Caban, and Markus Rupp Institute of Communications and Radio-Frequency Engineering, ... adaptive modulation and coding (AMC) by outdoor measurements The standard compliant AMC utilizes a 3-bit feedback for SISO and Alamouti coded MIMO transmissions By applying a 6-bit feedback and spatial ... performance of a SISO/MIMO OFDM system that uses the coding and modulation schemes defined in the WiMAX standard IEEE 802.16-2004 [5, Section 8.3], and [11] The feedback mechanism in WiMAX is limited

Ngày tải lên: 22/06/2014, 06:20

... adaptive multiresolution modulation and coding scheme which combines a multilayer video encoding and delivery scheme with an adaptive nonuniform phase-shift keyed (PSK) modulation/coding strategy The ... Multiresolution Modulation and Coding Scheme Yong Pei1 and James W Modestino2 Computer Electrical Science and Engineering Department, Wright State University, Dayton, OH 45435, USA and Computer ... memory M = 10 and a corresponding puncturing period P = ADAPTIVE MULTIRESOLUTION MODULATION AND CODING SCHEME A block diagram of the proposed adaptive multiresolution modulation/coding (AMC) system

Ngày tải lên: 22/06/2014, 19:20

... Choi and W E Stark, “Performance of ultra -wideband communications with suboptimal receivers in multipath channels,”... D’Andrea, and U Mengali, “Channel estimation for ultra -wideband communications,” ... Line Communications and. .. Engineering, and Statistics, Washington, DC, USA, June 1999 [22] H Dai and H V Poor, “Advanced signal processing for power line communications,” IEEE Communications ... degree... wideband impulse modulation combined with CDMA for PL communications This modulation approach requires a simple baseband time-domain implementation of the transmitter and the

Ngày tải lên: 22/06/2014, 19:20

... descriptive term for encoding and decoding processes and procedures in which the output of the decoding procedure(s) is identical to the input to the encoding procedure(s) 3.1.83 lossless coding: The mode ... coder: An embodiment of a coding process 3.1.20 coding: Encoding or decoding 3.1.21 coding model: A procedure used to convert input data into symbols to be coded 3.1.22 (coding) process: A general ... sequential progressive encoding of continuous tone grayscale and colour images Digital Compression and Coding of Continuous-tone Still images, is published in two parts: – Requirements and guidelines;

Ngày tải lên: 17/04/2017, 19:40

... are around the 2.4 GHz band and are commonly used by WLAN and Personal Area Networks (PANs) These are covered in Chapters and 11, respectively Parts of the 900 MHz and GHz bands are also available ... reflected off the ionosphere and can thus travel over very large distances Wireless Communications Principles and Fundamentals Figure 2.3 29 The various radio bands and their common use Although ... bands have more bandwidth and can carry more data However, the bands above visible light are rarely used in wireless communication systems due to the fact that they are difficult to modulate and

Ngày tải lên: 29/09/2013, 21:20

... Understand the Sketcher Toolbars and Icons. ♦ Be able create and manipulate 2D Geometry. ♦ Be able to apply and manipulate Constraints. AIRBUS UK CATIA V5 Foundation Course DMS42188 Page 4 of 65 ... controlling geometry and is described on the following page. The above commands are also accessible via the Insert drop down menu [...]... the third and fourth define the start and end points ... Course Axis Line The Axis Line is used to create revolved Solids and Groove features To create an Axis line select the icon and followed by to points or locations to define the length and

Ngày tải lên: 17/12/2013, 11:15

... Parameter Space and Signal Space 92 4.1.3 Parameter Estimation and Signal Restoration 93 4.1.4 Performance Measures and Desirable Properties of Estimators 94 4.1.5 Prior and Posterior Spaces and Distributions ... Statistical Averages of Two Random Processes 62 3.4.6 Cross-Correlation and Cross-Covariance 62 3.4.7 Cross-Power Spectral Density and Coherence 64 3.4.8 Ergodic Processes and Time-Averaged Statistics ... Shift 19 1.4 Sampling and Analog–to–Digital Conversion 21 1.4.1 Time-Domain Sampling and Reconstruction of Analog Signals 22 1.4.2 Quantisation 25 Bibliography 27 CHAPTER 2 NOISE AND DISTORTION 29

Ngày tải lên: 25/01/2014, 13:20

... both the pro- moter and coding regions, and histones are acetylated and displaced [56–58]. However, the presence of SAGA and SWI ⁄ SNF, and a high density of Pol II within the coding region, are ... acetylase and deacetylase modulate chroma- tin structure and fine-tune transcription [58]. The his- tone chaperones Asf1, Spt6 and Spt16 are involved in histone eviction and redeposition, and inactivation ... ambiguous than that of HSF1 and HSF2 [43]. The human cA-crystallin and cC-crystallin promoters contain HSEs of different configurations, and the for- mer is recognized by both HSF1 and HSF4, while the latter

Ngày tải lên: 18/02/2014, 04:20

... –SO 3 PO 3 HNa. (A) Expanded view of peaks at m ⁄ z 2800.36 and 2832.35 and the fragmentation of the peak at m ⁄ z 2800.36. (B) Expanded view of peaks at m ⁄ z 2934.36 and 2950.35 and the fragmentation ... wavelength of 295 nm and excitation and emission bandwidths of 4 and 5 nm, respectively To minimize the inner filter effect, aliquots... mass range of m ⁄ z 500–3500 and MS ⁄ MS spectra ... peptide from C53S 2-Cys Prx. Expanded view of peaks at m ⁄ z 2800.36 and 2832.35 and the fragmentation of the peak at m ⁄ z 2832.35. 2-Cys Prx was digested with trypsin and prepared for MALDI-TOF

Ngày tải lên: 18/02/2014, 17:20

... bandwidth constraint  Nyquist bandwidth constraint:  The theoretical minimum required system bandwidth to detect Rs [symbols/s] without ISI is Rs/2 [Hz].  Equivalently, a system with bandwidth ... filter Equalizing filter Threshold comparison For bandpass signals Compensation for channel induced ISI Baseband pulse (possibly distored) Sample (test statistic) Baseband pulse Received waveform Step 1 – ... [symbols/s] without ISI.  Bandwidth efficiency, R/W [bits/s/Hz] :  An important measure in DCs representing data throughput per hertz of bandwidth.  Showing how efficiently the bandwidth resources...

Ngày tải lên: 18/10/2013, 06:15

... features of digital communication systems  Some basic concepts and definitions such as as signal classification, spectral density, random process, linear systems and signal bandwidth. Lecture ... stream Format Format Digital info. Textual info. Analog info. Textual info. Analog info. Digital info. source sink Formatting and transmission of baseband signal Lecture 2 21 M-ary pulse modulation  M-ary ... with a digital system Lecture 2 20 Spectra of PCM waveforms Lecture 2 10 Encoding (PCM)  A uniform linear quantizer is called Pulse Code Modulation (PCM).  Pulse code modulation (PCM): Encoding...

Ngày tải lên: 23/03/2014, 10:21

... PAM T t )( 1 t ψ T 1 0 Digital Communications I: Modulation and Coding Course Term 3 - 2008 Catharina Logothetis Lecture 5 Lecture 5 2 Last time we talked about:  Receiver structure  Impact of AWGN and ISI ... noise vector are i.i.d Gaussian random variables with zero-mean and variance . The noise vector pdf is  The elements of observed vector are independent Gaussian random variables. Its pdf is ), ... to maximize SNR  Matched filter and correlator receiver  Signal space used for detection  Orthogonal N-dimensional space  Signal to waveform transformation and vice versa Lecture 5 7 Detection...

Ngày tải lên: 23/03/2014, 10:21

... ,zzZ ZZZZ = =Z Channel Lecture 10 2 Last time, we talked about:  Channel coding  Linear block codes  The error detection and correction capability  Encoding and decoding  Hamming codes  Cyclic codes Lecture 10 ... design and evaluation of the code.  Block codes are based on algebraic/combinatorial techniques.  Convolutional codes are based on construction techniques. Digital Communications I: Modulation and ... specified by three parameters or where  is the coding rate, determining the number of data bits per coded bit.  In practice, usually k=1 is chosen and we assume that from now on.  K is the constraint...

Ngày tải lên: 25/10/2013, 06:15

... error correction coding?  Error performance vs. bandwidth  Power vs. bandwidth  Data rate vs. bandwidth  Capacity vs. bandwidth (dB) / 0 NE b B P A F B D C E Uncoded Coded Coding gain: For ... coset kknknkn k k 22 2 22 2 2222 2 21 UeUee UeUee UUU ⊕⊕ ⊕⊕ −−− L MOLM L L zero codeword coset coset leaders kn i − = 2, ,3,2 n V i e th:i Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 9 Lecture 9 36 Cyclic ... detection and correction codes Lecture 9 28 Linear block codes – cont’d  Standard array  For row , find a vector in of minimum weight which is not already listed in the array.  Call this pattern and...

Ngày tải lên: 25/10/2013, 06:15

... information provides the decoder with a measure of confidence for the decision. Digital Communications I: Modulation and Coding Course Period 3 - 2007 Catharina Logothetis Lecture 12 ... each state, and keeps only the path with the largest metric, called the survivor, together with its metric. Lecture 12 6 Soft and hard decision decoding …  ML soft-decisions decoding rule:  Choose ... code uses two levels on coding, an inner code and an outer code (higher rate).  Popular concatenated codes: Convolutional codes with Viterbi decoding as the inner code and Reed-Solomon codes...

Ngày tải lên: 29/10/2013, 13:15