Digital Communications 1. Safwan El Assad
bipolar codeFigure 5.48. 2nd order interleaved bipolar precoderFigure 5.49. 2nd order interleaved bipolar coding chainFigure 5.50. Example of a coded sequence of the 2nd order interleaved bipolar co...Figure 5.51. Power spectral density of the 2nd order interleaved bipolar codes a...Figure 5.52. Basic signals used in biphase codes WAL1 and WAL2Figure 5.53. Power spectral densities of the two-phase codes WAL1 and WAL2. For ...Figure 5.54. Power spectral density of on-line codes presented. For a color vers...
8 Chapter 6Figure 6.1. Practical chain of a digital baseband communication systemFigure 6.2. Equivalent energy bandwidth Δfe of a low-pass filter. For a color ve...Figure 6.3. Illustration of the intersymbol interference phenomenon. For a color...Figure 6.4. Characteristics of the eye diagram: case of binary symbols ak = ± 1Figure 6.5a. Examples of an eye pattern. For a color version of this figure, see...Figure 6.5b. Examples of an eye pattern (following). For a color version of this...Figure 6.6. Link with the detection theoryFigure 6.7. Sample values akp(t0) and optimal threshold values (M-ary symbols)Figure 6.8. Illustration of Nyquist temporal criterion for a null ISIFigure 6.9. Spectrum of in the case where Ds < 2BFigure 6.10. Spectrum of in the case where Ds = 2BFigure 6.11. First Nyquist frequency criterionFigure 6.12. Spectrum of
9 Chapter 7Figure 7.1(a). Schematic block diagram of a digital radio transmission systemFigure 7.1(b). Schematic block diagram of a digital radio transmission system (f...Figure 7.2. Principle of multiple access techniques: FDMA, TDMA and DS-CDMAFigure 7.3. Principle of direct sequence spread spectrum for a userFigure 7.4. Allocation in France of the OFDM spectrum in the 802.11.g standardFigure 7.5. Structure of a terrestrial link (one jump)Figure 7.6. Structure of a satellite linkFigure 7.7. Urban radio-mobile propagation: downlinkFigure 7.8. Direct and delayed propagation in the case of a terrestrial-satellit...Figure 7.9. Oscillation of |M(f)| for parameters typical of a terrestrial-satell...Figure 7.10. Harmful effects of non-linearities of power amplifiers on transmiss...Figure 7.11. Power spectral density of the modulated signalFigure 7.12. General structure of the linear digital modulator. For a color vers...Figure 7.13. Consrtuction of the spatial diagramFigure 7.14. General scheme of a digital radio transmission systemFigure 7.15. Simplified block diagram of a digital radio transmission systemFigure 7.16. Complex envelope and equivalent baseband filterFigure 7.17. Distribution of the signals on the carrier in-phase and on the carr...Figure 7.18. Construction of the complex envelope sc,e(t) from the information-b...Figure 7.19. Transition from a digital transmission with carrier modulation to a...Figure 7.20. Block diagram of the BPSK modulator and constellation diagramFigure 7.21. Block diagram of the BPSK demodulatorFigure 7.22. Output of the BPSK modulator for a binary sequence that changes alt...Figure 7.23. Minimum frequency bandwidth required for a channel to transmit wito...Figure 7.24. Block diagram of the QPSK modulatorFigure 7.25. Coding table and vectorial diagram of QPSK modulationFigure 7.26. Channels I(t) and Q(t) for a binary sequence that changes alternate...Figure 7.27. QPSK receiverFigure 7.28(a). Differential BPSK coding and decoding tableFigure 7.28(b). Associated circuits (following)Figure 7.29. Differential QPSK coding and decoding table and Karnaugh tablesFigure 7.30. Simplified equations of the differential QPSK encoder and its imple...Figure 7.31. Simplified equations of the differential QPSK decoder by Karnaugh t...Figure 7.32. Implementation scheme of the differential QPSK decoderFigure 7.33(a). Binary signal, modulating signal and phases of the OQPSK modulat...Figure 7.33(b). Constellation diagram of the OQPSK modulation (following)Figure 7.34. Gray coding tables of the 16-QAM modulationFigure 7.35. Constellation diagram of the 16-QAM modulationFigure 7.36. Block diagram of the 16-QAM modulator with differential coding base...Figure 7.37. 16-QAM modulator based on the use of two separately controlled QPSK...Figure 7.38. Different channels for a binary sequence that changes alternately b...Figure 7.39. CIR (4, 4, 4, 4) modulation. For a color version of this figure, se...Figure 7.40. 8-PSK modulator coding tablesFigure 7.41. Constellation diagram of the 8-PSK modulationFigure 7.42. Simulation of the differential 8-PSK encoder with SimulinkFigure 7.43. Simulation of the differential 8-PSK decoder with SimulinkFigure 7.44. Implementation of the differential encoder (top) and the decoder (b...Figure 7.45. Diagram of the 8-PSK transmitter including the differential encoderFigure 7.46. Diagram of the 8-PSK receiver including the differential decoderFigure 7.47. Different channels for a binary sequence that changes alternately b...
List of Tables
1 Chapter 1Table 1.1. Examples of telecommunications services
2 Chapter 3Table 3.1. Examples of unique decoding and separable codes (except codes C1 and ...Table 3.2. Example of the design of an instantaneous binary codeTable 3.3. Characteristics of a two-symbol sourceTable 3.4. Binary coding example of Shannon–Fano codingTable 3.5. Example of Huffman binary code designingTable 3.6. Performance comparison of coding methods
3 Chapter 4Table 4.1. State of the register at each clock cycleTable 4.2. Summary of the values of the cross-correlation of the M-sequences and...Table 4.3. XOR operatorTable 4.4. SpecificationsTable 4.5. Parameters
4 Chapter 6Table 6.1. Main features of the five digital transmission systems standardized i...Table 6.2. Calculation of the conditional probabilities P(m[/0) = Pr{mt/ak = 0}Table 6.3. Calculation of the conditional probabilities p(mι/–1) = Pr{mi/ak = –1...Table 6.4. Calculation of the conditional probabilities p(ml/1 = Pr{ml/ak =1}
5 Chapter 7Table 7.1. Frequency characteristics of channels 1, 6 and 11Table 7.2. Key features of the standards: UMTS (3G), LTE (4G) and IMT-2020