Digital Communications 1. Safwan El Assad

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      1 Introduction to Part 1Figure I1.1. General structure of a digital communications system and its proble...

      2 Chapter 1Figure 1.1. Simple communication system. For a color version of this figure, see...Figure 1.2. Modes of communication:

      3 Chapter 2Figure 2.1. Entropy of a two-event sourceFigure 2.2. Basic transmission system based on a discrete channel. For a color v...Figure 2.3. Ambiguity on the symbol at the input when yj is receivedFigure 2.4. Uncertainty on the output when we know the inputFigure 2.5. Binary symmetric channelFigure 2.6. Variation of the capacity of a BSC according to p

      4 Chapter 3Figure 3.1. Classification of codes. For a color version of this figure, see www...

      5 Chapter 4Figure 4.1. Simplified block diagram of the communication systemFigure 4.2. Exponent of the error probabilityFigure 4.3. Error correction strategiesFigure 4.4. Hamming encoderFigure 4.5. Hamming decoderFigure 4.6. Extension of the Hamming encoderFigure 4.7. Extension of the Hamming decoderFigure 4.8. Divider circuitFigure 4.9. Divider circuit pre-multiplied by xkFigure 4.10. Efficient encoderFigure 4.11. Example of encoder operation at each clock cycleFigure 4.12. Division circuit by g(x), general caseFigure 4.13. Pre-multiplied division circuit by xk, general caseFigure 4.14. Encoder based on division circuit pre-multiplied by xkFigure 4.15. Decoder based on division circuit pre-multiplied by xkFigure 4.16. Linear feedback shift registerFigure 4.17. Linear feedback shift register encoderFigure 4.18. Linear feedback shift register decoderFigure 4.19. Block diagram of the encoderFigure 4.20. Block diagram of the decoderFigure 4.21. Coding by multiplication. For a color version of this figure, see w...Figure 4.22. State of the register at each clock cycle. For a color version of t...Figure 4.23. M-sequence generatorFigure 4.24. 4-cell M-sequence generatorFigure 4.25. Symmetric NRZ signal of the output sequence (sequence generator of ...Figure 4.26. Autocorrelation function of an M-sequenceFigure 4.27. Power spectral density of an M-sequenceFigure 4.28. Generator of Gold sequencesFigure 4.29. Sequences generator of the large Kasami setFigure 4.30. Block diagram of a stream encryption/decryption systemFigure 4.31. Internal structure of Trivium

      6 Introduction to Part 2Figure I2.1. General diagram of a digital radio transmission systemFigure I2.2. General diagram of a digital radio transmission system

      7 Chapter 5Figure 5.1. Principle of binary to M-ary transcoding and M-ary to signal codingFigure 5.2. Diagram of encoder and decoder of the symmetrical NRZ-L codeFigure 5.3. Example of a chronogram of the symmetrical NRZ-L codeFigure 5.4. Power spectral density of the symmetrical NRZ-L on-line code. For a ...Table 5.1. Characterization of the NRZ-M code as a coding and decoding tableFigure 5.5. Block diagram of the NRZ-M coder and decoderFigure 5.6. Example of a chronogram of the symmetrical NRZ-M codeFigure 5.7. Example of the chronogram of the NRZ 4-ary on-line codeFigure 5.8. Power spectral density of the symmetrical NRZ 4-ary code. For a colo...Figure 5.9. Diagram of the binary RZ on-line code (for θ — 1/2)Figure 5.10. Example of a chronogram of the binary RZ code (for θ — 1/2)Figure 5.11. Power spectral density of the binary RZ on-line code (for θ = 1/2)....Figure 5.12. Block diagram of the encoder of the polar RZ on-line code (for θ = ...Figure 5.13. RZ polar code (for θ = 1/2)Figure 5.14. Power spectral density of the polar RZ code (for θ — 1/2). For a co...Figure 5.15. Binary biphase coder and decoder block diagram (Manchester code)Figure 5.16. Example of a biphase code chronogram (Manchester code)Figure 5.17. Power spectral density of a biphase code (Manchester code). For a c...Figure 5.18. Block diagram of the differential biphase coder and decoder (Manche...Figure 5.19. Example of a chronogram of the differential biphase code(Manchester...Figure 5.20. Block diagram of the Miller encoderFigure 5.21. Example of a chronogram of the Miller codeFigure 5.22. Power spectral density of the Miller on-line code. For a color vers...Figure 5.23. Block diagram of the bipolar RZ encoder and decoder (or AMI)Figure 5.24. Example of a chronogram of the bipolar RZ code (or AMI)Figure 5.25. Power spectral density of the bipolar RZ code (or AMI). For a color...Figure 5.26. Example of a chronogram of a CMI codeFigure 5.27. Power spectral density of the CMI on-line code. For a color version...Figure 5.28. Example of a chronogram of the HDB-3 code. For a color version of t...Figure 5.29. Power spectral density of the HDB-3 on-line codeFigure 5.30. Power spectral density of the main on-line codes presented. For a c...Figure 5.31. Generation of partial response linear codeFigure 5.32. Precoder and encoder pairFigure 5.33. Block diagram of the general structure of the partial response line...Figure 5.34. Block diagram of the general structure of the partial response prec...Figure 5.35. Combined structures of the precoder, transcoder and encoderFigure 5.36. Block diagram of the generation of a partial response linear code f...Figure 5.37. Duobinary encoder block diagramFigure 5.38. Duobinary precoderFigure 5.39. Combined structure of the precoder, transcoder and encoder of the d...Figure 5.40. Example of duobinary on-line codeFigure 5.41. Power spectral density of duobinary on-line code. For a color versi...Figure 5.42. NRZ СКАЧАТЬ