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AN EFFICIENT RADIO RESOURCE MANAGEMENT STRATEGY FOR ADAPTIVE OFDM CELLULAR SYSTEMS

机译:自适应OFDM细胞系统的有效无线电资源管理策略。

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摘要

This paper presents an efficient Radio Resource Management (RRM) strategy for adaptive Orthogonal Frequency Division Multiplexing (OFDM) cellular systems. In the proposed strategy, only those users who have the same distance from their base stations can reuse a same subcarrier. This can guarantee the received Carrier-to-Interference ratio (C/I) of each subcarrier to be acceptable as required by system planning. Then by employing different modulation scheme on each subcarrier according to its received C/I, system spectral efficiency can be gracefully increased. Analytical and simulation results show that the spectral efficiency is improved by 40% without sacrificing the Bit Error Rate (BER) performance and call blocking probability and system capacity of the proposed strategy is better than conventional systems.
机译:本文提出了一种用于自适应正交频分复用(OFDM)蜂窝系统的有效无线资源管理(RRM)策略。在提出的策略中,只有与基站具有相同距离的那些用户才能复用相同的子载波。这样可以保证每个副载波的接收到的载波干扰比(C / I)都可以满足系统规划的要求。然后,通过根据每个子载波接收到的C / I采用不同的调制方案,可以适当地提高系统频谱效率。分析和仿真结果表明,在不牺牲误码率(BER)性能的前提下,频谱效率提高了40%,并且该策略的呼叫阻塞概率和系统容量均优于常规系统。

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