Equal Power and Channel Sensing Over Multiuser OFDM Systems
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2017, Vol 5, Issue 6
Abstract
As wireless communication develops rapidly, the value of frequency spectrum increases. Sometimes the spectrum bands are underutilized since the spectrum bands are not always occupied by the licensed users. Cognitive users try to transmit data using spectrum holes. Interference introduced by unlicensed secondary users to primary users makes power and channel allocation problem more complex in nature. It necessitates the need for minimum signal-to-interference-plus-noise ratio (SINR) in cognitive radio. In this project, investigation of joint power and channel allocation problem for the Orthogonal Frequency Division Multiplexing (OFDM) based multi-user cognitive radio systems are performed. Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a reliable technique to achieve high downlink capacities in future cellular and wireless local area network (LAN) systems. Here, the water filling algorithm is used to provide the equal power and channel allocation over the secondary users with respect to the primary users by utilizing the network and data efficiently. Quality-of-service (QoS) in terms of signal-to-interference-plus-noise ratio (SINR) and proportional rate constraints are achieved through the proposed method.
Authors and Affiliations
Lalthathangi . , Vidhya B
Keywords
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