Reconfigurable Transceivers for Wireless Broadband Access Schemes

Though code division multiple access (CDMA) and orthogonal frequency division multiple access (OFDMA) are potential candidates for future broadband wireless access schemes, the requirements of the users may not be completely supported by a single communication system. Therefore, for easy connectivity and compatibility with the existing communication systems and to support various quality-of-service (QoS) requirements, systems with dynamic reconfigurability are inevitable. This article gives an overview of CDMA, OFDMA, and other block-based transmissions, and proposes a reconfigurable transceiver whose blocks can be configured in order to support any of the above air interfaces. The reconfigurable transceiver allows low-cost implementation of multiple air interfaces in a single terminal and achieves optimal QoS based on the available wireless networks.