期刊名称：International Journal of Communication and Computer Technologies
印刷版ISSN：2278-9723
出版年度：2012
卷号：1
期号：1
出版社：IJCCTS
摘要：WiMAX is one of the latest techniques forproviding Broadband Wireless Access in metropolitanarea. Phenomenal growth in the demand for higherbandwidth increases the importance of subcarrierallocation. WiMAX uses OFDMA techniques based onmultiuser diversity such as Adaptive ModulationCoding. Resource Allocation Algorithm improvesperformance based on user channel condition. FairAllocation Algorithm maximizes the minimum data rateand allocates equal bandwidth to all users. However thisallocation reduces the bandwidth efficiency of thesystem. In order to overcome this drawback Heuristicsallocation such as Proportional Allocation and EqualCapacity Increment are introduced. To improve theirperformance, both allocations are combined. The otherobjective is to share better trade off between bandwidthefficiency and fairness. Performance has been comparedon the basis of bit error rate with respect to signal tonoise ratio and various user distances from base station
