Instruct: Classify the given Amazon review as either positive or negative.
Query: Advanced modulation techniques

After reading this book, I found this book very usefull. It has very ritch contents. the main parts I liked in this book are:Waveform shaping: It has a complete overview of the most up to date pulse shaping techniques used in the advanced digital sysyems. Multi-h modulation schemes: This is an important new topic that can't be found in many digital communications books. Detailed: A good feature in this book is that it deals with the fetails of the advanced digital modulation schemes.Most digital communications books talks breifly about this topics.Therefore, I think that this book is a good reference for researchers and students.