Jointly optimum power and bandwidth allocation for multi-rate FDM and FDMA over overloaded channels

Joon Ho Cho, Q. Zhang
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引用次数: 4

Abstract

An optimal power and bandwidth allocation problem is considered for multi-rate frequency-division multiplexing (FDM) and frequency-division multiple-access (FDMA) over overloaded channels. We have derived the optimum frequency-division system that minimizes the total transmitted power subject to the QoS of users defined in terms of the transmission rates and the SINR requirements. The necessary and sufficient condition is found for the admissibility of the users, and the optimum power, bandwidth, transmit waveform, and receive waveform are found for each user. It is shown that the optimum frequency-division system performs exactly the same as the optimum CDMA system when all the users have the same transmission rate and channel gain. It is also shown that the optimum frequency-division system always outperforms the ETSC-minimizing code-division system when all the overloading users have the same transmission rate.
多速率FDM和FDMA在过载信道上的联合优化功率和带宽分配
考虑了多速率频分复用(FDM)和频分多址(FDMA)在过载信道上的最优功率和带宽分配问题。我们已经推导出最优的分频系统,该系统根据传输速率和信噪比要求定义的用户QoS最小化总发射功率。找出了用户可接受的充分必要条件,并找出了每个用户的最佳功率、带宽、发射波形和接收波形。结果表明,当所有用户具有相同的传输速率和信道增益时,最优分频系统的性能与最优CDMA系统完全相同。当所有过载用户具有相同的传输速率时,最优分频系统总是优于最小化etsc分码系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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