The future wireless systems are anticipated to support much higher data rates than what the existing systems can currently offer. It has been universally agreed that a richer set of QoS levels are still needed for the emerging networks to successfully launch the upcoming applications. This is because the QoS components reflect the network''s availability and transmission quality. Therefore,spectrally efficient techniques, which could simultaneously meet the QoS guarantees is highly essential. This prompted for developing QoS solutions through radio adaptation techniques, that are suitable to meet the multifaceted requirements. This book focuses on various adaptive methods by which the radio management techniques can be better tuned to overcome the challenges which arise in a cellular mobile scenario. This book proposes realistic solutions that are certain to attract the network operators and the subscriber population in a large measure for better quality of service.