Interference mitigation in cognitive radio-based LTE femtocells

Wireless communication has involved relentless years of research and design and comprises cellular telephony, broadcast and satellite television, wireless networking to today's 3rd Generation Partnership Project (3GPP) and Long Term Evolution (LTE) technology. This chapter examines interference mitigation in femtocells using cognitive radio (CR) and provides comprehensive survey of different CR enabled interference mitigation schemes. It introduces femtocells and different types of interference challenges experienced by them. Femtocell provides the solution to poor indoor coverage in cellular communication, which has hugely attracted network operators and stakeholders. The chapter presents various deployment modes of femtocells and issues related to interference versus deployment. It also presents the analysis of interference mitigation schemes using CR. The chapter highlights trade-offs and cost of using CR in femtocells with some insight into future research issues and challenges.