首页> 外文会议>Electrical and Computer Engineering, 2003. IEEE CCECE 2003. Canadian Conference on >A modified sub-optimum adaptive bit and power allocation algorithm in wideband OFDM system
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A modified sub-optimum adaptive bit and power allocation algorithm in wideband OFDM system

机译:宽带OFDM系统中的改进次优自适应比特和功率分配算法。

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摘要

OFDM and adaptive transmission are two most promising technique for next generation high data rate mobile communication systems. In this paper, we combine the two techniques and propose a simple and computational efficient adaptive bit and power allocation algorithm for broadband OFDM system. In the algorithm, first the bit and corresponding power are allocated to each sub-carrier according to channel condition, water filling theory and QoS requirement of the user, then the residual power is allocated to the sub-carriers which can use them most efficiently. In this way, this algorithm is efficient while calculation is less complex. Simulation results show the advantages of the proposed algorithm over those of equal bit loading algorithm and original SNR based adaptive allocation method.
机译:OFDM和自适应传输是下一代高数据速率移动通信系统中最有希望的两种技术。在本文中,我们结合了这两种技术,为宽带OFDM系统提出了一种简单且计算效率高的自适应比特和功率分配算法。在该算法中,首先根据信道条件,注水原理和用户的QoS要求,将比特和相应的功率分配给每个子载波,然后将剩余功率分配给可以最有效地利用它们的子载波。这样,该算法是有效的,而计算却不那么复杂。仿真结果表明,与等比特加载算法和基于原始SNR的自适应分配方法相比,该算法具有优势。

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