Introduction.- Precoding Techniques in ISI Channels.- Precoding Techniques in Multiple Access Channels.- Precoding Techniques for MIMO Channels.- Precoded Multiuser (PMU-) OFDM System.- MAI-Free MC-CDMA System.- Simplified Multiuser Detection for MC-CDMA with Carrier Interferometry Codes with CFO.- Ultra Wideband (UWB) Precoding System Using Channel Phase.- Conclusion and Future Trends.
During the past two decades, many communication techniques have been developed to achieve various goals such as higher data rate, more robust link quality,andmoreusercapacityinmorerigorouschannelconditions.Themost well known are, for instance, CDMA, OFDM, MIMO, multiuser OFDM, and UWB systems.All these systems havetheir ownunique superioritywhile they also induce other drawbacks that limit the system performance. Conventional way to overcome the drawback is to impose most of the computational e?ort in the receiver side and let the transmitter design much simpler than receiver. The fact is that, however, by leveraging reasonable computational e?ort to the transmitter, the receiver design can be greatly simpli?ed. For instance, multiaccess interference (MAI) has long been considered to limit the perf- mance of multiuser systems. Popular solutions to mitigate MAI issue include multiuser detection (MUD) or sophisticated signal processing for interference cancellation such as PIC or SIC. However, those solutions impose great b- den in the receiver. In this case, precoding o?er good solutions to achieve simple transceiver designs as we will mention later in this book. This book is intended to provide a comprehensive review of precoding techniques for digital communications systems from a signal processing p- spective. The variety of selected precoding techniques and their applications makes this book quite di?erent from other texts about precoding techniques in digital communication engineering.
This book details modern precoding techniques for modern digital communications systems. It covers both the fundamentals of the subject as well as system applications. Coverage first provides an overview of existing precoding techniques. From this tutorial overview, readers can understand the evolution of precoding and the principles of various precoding schemes. The book then discusses the application of state-of-the-art precoding schemes to current and/or emerging communication systems to combat impairments such as inter-symbol interference (ISI), multiaccess interference (MAI) and the Doppler effect. Those communication systems include: orthogonal frequency division multiplexing (OFDM), multiuser OFDM, MC-CDMA, multi-input and multi-output (MIMO) and ultra wideband (UWB) radio systems. In addition, a discussion on advanced topics and an extensive list of references will facilitate researchers to further explore this subject on their own.