Digital Communications 2 Digital Modulations [Hardcover]

This second volume covers the following blocks in the chain of communication: the modulation baseband and transposed band, synchronization and channel estimation as well as detection. Variants of these blocks, the multicarrier modulation and coded modulations are used in current systems or future.

List of Acronyms xiii

Notations. xvii

Introduction xix

Chapter 1. Background 1

1.1. Introduction 1

1.2. Common operations and functions 1

1.2.1. Convolution 1

1.2.2. Scalar product 2

1.2.3. Dirac function, Dirac impulse and Kronecker’s symbol 2

1.2.4. Step function 3

1.2.5. Rectangular function 3

1.3. Common transforms 3

1.3.1. Fourier transform 3

1.3.2. The z transform 6

1.4. Probability background 6

1.4.1. Discrete random variables 7

1.4.2. Continuous random variables 9

1.4.3. Jensen’s inequality 9

1.4.4. Random signals 10

1.5. Background on digital signal processing 13

1.5.1. Sampling 13

1.5.2. Discrete, linear and time-invariant systems 14

1.5.3. Finite impulse response filters 17

1.5.4. Infinite impulse response filters 17

Chapter 2. Baseband Transmissions 19

2.1. Introduction 19

2.2. Line codes 20

2.2.1. Non-return to zero (NRZ) code 20

2.2.2. Unipolar return-to-zero (RZ) code 23

2.2.3. Bipolar return-to-zero (RZ) code 25

2.2.4. Manchester code 25

2.2.5. Alternate mark inversion code 26