Modulation and Detection - Table of Contents
Chapter 1 - Channel Models
1) Representation of bandpass signals and bandpass filters
2) Additive white Gaussian noise channel
3) Linear Time-invariant channel
4) Linear Time-varying channel
5) Mobile Radio Channel
1. Path Loss
2. Shadowing
3. Small-scale fading
Effect of path delay variation
Response to unmodulated carrier
Effect of motion
Statistical modelling: Rayleigh fading, Rice fading
4. Numerical Results
6) Discrete-time channel model
1. LTI channel
2. LTV channel
7) Implementation aspects
1. Transmitter implementation
2. Receiver implementation
8) Simulation Issues
1-1
1-2
1-3
1-3
1-5
1-6
1-6
1-7
1-8
1-8
1-9
1-12
1-14
1-15
1-15
1-16
1-19
1-19
1-20
1-21
Chapter 2 - Notions about estimation and decision theory
1) Definitions
2) Detection and Estimation
3) Sufficient statistic and reversible transformation
4) Gaussian observation vector
5) Continuous-time Gaussian observation
6) Cramer-Rao lower bound
7) ML detection from Gaussian observation : BER performance
1. General BER expression
2. BER upper bound
3. Example
8) Linear digital modulation
1. ML detector
2. BER performance for diagonal G
3. BER upper and lower bound for non-diagonal G
4. Symbol-by-symbol receiver for non-diagonal G (slides 98-144)
2-1
2-3
2-6
2-8
2-10
2-11
2-12
2-12
2-13
2-16
2-17
2-17
2-19
2-20
2-21
Chapter 3 - Digital Transmission over the AWGN channel
1) Transmitter and channel description
2) ML Receiver
3) BER performance
4) How to achieve Gtot = IN?
1. Conventional linear digital modulation
2. Block transform linear digital modulation
5) Requirement on available channel bandwidth
3-1
3-4
3-6
3-9
3-9
3-10
3-12
Chapter 4 - Diversity transmission over parallel frequency-flat time-flat fading channels
1) Transmitter and channel description
4-1
2) ML Receiver
4-2
3) BER performance
4-4
1. AWGN channels
4-4
2. Rayleigh fading channels
4-5
4) Practical realizations of diversity transmission
4-9
1. Frequency diversity
4-9
2. Time diversity
4-9
3. Antenna diversity (spatial diversity)
4-11
5) Remarks
4-13
1. Rice fading
4-13
2. Correlated Rayleigh fading
4-13
3. Use of error-correcting codes
4-14
6) Appendix: BER computation
4-15
1. Upper bound on Q(x)
4-15
2. Computation of E[exp(-(Eb/N0)αd|Hch,d(i)|²]
4-15
Chapter 5 - Multiuser communication on the AWGN channel
1) Definitions and terminology
2) Multiuser system description
3) ML detection for orthogonal user signals
4) Basic duplexing, multiplexing and multiple access schemes
5) Description of the Base Station and the User Terminal
6) Requirements on signal coordination
7) Peak power considerations
8) Accommodating variable symbol rates
9) The effect of channel dispersion
10) The cellular radio concept
11) Upstream power control
12) Downstream power control
13) Cell sizes
14) A few current standards
5-1
5-2
5-3
5-5
5-7
5-10
5-11
5-12
5-13
5-14
5-15
5-16
5-16
5-17
Chapter 6 - Conventional digital modulation on dispersive channels
1) Transmitter and channel model
2) The matched filter and the whitened matched filter
3) The matched filter bound on the BER performance
4) ML sequence detection: Viterbi equalization
5) BER performance of the ML sequence detector
Upper bound on BER
Lower bound on BER
Minimum Euclidian distance dmin
6) Linear equalization
1. Zero-forcing linear equalizer (ZF-LE)
2. Minimum mean-square error linear equalizer (MMSE-LE)
3. Comparison of ZF-LE and MMSE-LE
7) Decision-feedback equalization
1. Zero-forcing decision-feedback equalizer (ZF-DFE)
2. Minimum mean-square error decision-feedback equalizer (MMSE-DFE)
3. Comparison of ZF-DFE and MMSE-DFE
8) Comparison between LE and DFE performance
9) Finite-complexity equalizers
10) Multipath fading channels
11) Appendix
1. Spectral factorization
2. Linear prediction
Chapter 7 - Spread-spectrum communication and CDMA (slides)
1) Spread-spectrum / CDMA: basic principles
1. AWGN channel
2. Spread-spectrum transmitter
2) Spread-spectrum point-to-point communication
1. AWGN channel
2. Low detectability of signal presence
3. Robustness against narrowband interference (“jamming”)
4. Dispersive channel
5. Multipath channel : RAKE filter
3) Spread-spectrum multi-user communication: CDM(A)
1. AWGN channel
2. Dispersive channels
3. BER in the presence of MUI
4) CDMA vs. TDMA
5) Spread-spectrum for localization: Global Positioning System
6) Chip sequence generation
7) Conclusions
6-1
6-1
6-5
6-6
6-10
6-11
6-13
6-14
6-16
6-18
6-20
6-22
6-24
6-26
6-28
6-30
6-32
6-33
6-36
6-39
6-39
6-41
3
4
10
17
17
24
28
41
57
63
69
79
96
106
121
140
Chapter 8 - Multicarrier modulation - Orthogonal frequency-division multiplexing (slides)
1) Multicarrier transmission on AWGN channel
6
2) Multicarrier transmission on dispersive channel
14
3) Spectral properties
31
4) Complexity considerations
37
5) Complexity reduction by means of digital signal processing
39
6) Performance of discrete-time multicarrier modulation
53
7) Multicarrier modulation on AWGN channel
63
8) Effect of time delay uncertainty
66
9) Multicarrier modulation on dispersive channel
71
10) Multicarrier modulation on time-varying channels
88
11) Conclusions
101
Appendix
1) Definitions related to matrices and vectors
2) Gaussian random variables and processes
3) Dimensionality of complex baseband signals that are essentially
time- and frequency- limited
A-1
A-2
A-5