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International Journal of Soft Computing

Year: 2013  |  Volume: 8  |  Issue: 4  |  Page No.: 269 - 275

An Efficient Technique for Sub-Carrier Group Allocation over Hybrid MC CDMA

S. Balaji and N. Vasudevan

Abstract

Now a days the wireless communication plays an important role in various fields such as business, entertainment, information processing, etc. There are various methods of modulation schemes which are used to send and receive the data to or from the base station and mobile stations. The 4G wireless communications are used in various applications such as multimedia, live streaming, video conferencing, mobile TV and so on. The OFDMA (Orthogonal Frequency Division Multiple-Access) techniques are used to support multiple users who can communicate with the single base station to improve the throughput. MIMO (Multiple Input Multiple Output) is a technique which is used to satisfy the demand of the wireless communication system. The channels are allocated to the user for efficient communication between base station and mobile stations. The channel with minimum transmission power has been assigned to the user from the channel list. Suppose the requested channel is not available which leads a performance problem then the channels are maintained as a group. The proposed technique maintains a group of channel in an increasing order. Suppose the channel unavailability occur it will select a suitable channel from the group. If the requested channel is not available in the group it will automatically select a channel from the other group which decreased the signal to noise ratio in the communication. It also uses various algorithms like channel and group estimation, channel assignment and alignment which improve the throughput over the wireless communication. The adaptive technique also implemented to assign and align the channel to the requested users. In future the throughput will be improved by using an efficient technique.

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