Multiuser Detection
Multiuser Detection provides the first comprehensive treatment of the subject of multiuser digital communications. Multiuser detection deals with demodulation of the mutually interfering digital streams of information that occur in areas such as wireless communications, high-speed data transmission, satellite communication, digital television, and magnetic recording. The development of multiuser detection techniques is one of the most important recent advances in communications technology, and this self-contained book gives a comprehensive coverage of the design and analysis of receivers for multiaccess channels, while focusing on fundamental models and algorithms. The author begins with a review of multiaccess communications, dealing in particular with code division multiple access (CDMA) channels. Background material on hypothesis testing and the effect of multiuser interference on single-user receivers are discussed next. This is followed by the design and analysis of optimum and linear multiuser detectors. Also covered in detail are topics such as decision-driven multiuser detection and noncoherent multiuser detection. The elements of multiuser detection are clearly and systematically presented along with more advanced recent results, some of which are published here for the first time. The extensive set of references and bibliographical notes offer a comprehensive account of the state of the art in the subject. The only prerequisites assumed are undergraduate-level probability, linear algebra, and introductory digital communications. The book contains over 300 exercises and is a suitable textbook for practicing engineers, as well as a valuable reference volume for researchers in communications and signal processing.
Why Read This Book
You should read this book if you need a deep, rigorous foundation in multiuser receiver design — it explains optimal and practical detectors for interfering digital streams and analyzes their performance. You will learn both the theory (ML/MAP, multiuser efficiency, capacity) and the tradeoffs that guide real CDMA and multiaccess system design.
Who Will Benefit
Graduate students, researchers, and communications engineers working on CDMA/multiaccess systems, interference mitigation, or advanced receiver algorithms.
Level: Advanced — Prerequisites: Probability and random processes, linear algebra, basic detection/estimation theory, and familiarity with digital communications (modulation and CDMA concepts).
Key Takeaways
- Derive and understand optimum multiuser detectors (ML and MAP) and their performance limits.
- Analyze and apply linear multiuser receivers such as the decorrelator and MMSE detector.
- Design and evaluate nonlinear interference cancellation schemes (successive and parallel interference cancellation, multistage detectors).
- Quantify multiuser performance using error probability bounds, multiuser efficiency, and capacity/spectral-efficiency results.
- Assess computational complexity and trade-offs to choose practical near-optimal algorithms for real systems.
- Apply asymptotic / large-system analysis for performance predictions in random-spreading CDMA.
Topics Covered
- 1. Introduction and Multiaccess Channel Models
- 2. Performance Measures and Single-User Detection Review
- 3. Optimum Multiuser Detection: ML and MAP Receivers
- 4. Computational Complexity and the Need for Suboptimal Receivers
- 5. Linear Multiuser Receivers: Decorrelator and MMSE
- 6. Successive Interference Cancellation and Decision-Feedback Schemes
- 7. Parallel and Multistage Detection
- 8. Performance Analysis and Error Probability Bounds
- 9. Information-Theoretic Aspects: Capacity and Spectral Efficiency
- 10. Fading Channels, Power Control and Near–Far Problem
- 11. Practical Algorithms and Implementation Considerations
- 12. Extensions and Open Problems in Multiuser Detection
How It Compares
More focused and rigorous on multiuser receiver theory than Proakis's Digital Communications (which is broader), and more specialized than Tse & Viswanath's Fundamentals of Wireless Communication which emphasizes modern information-theoretic capacity perspectives and broader wireless topics.
