Multi rate orthogonal frequency division multiplexing
Multi rate orthogonal frequency division multiplexing
复制标题
多速率正交频分复用
DOI：
10.1109/icc.2005.1494817
复制
发表时间：
2005
期刊：
影响因子：
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通讯作者：
F. Fitzek
中科院分区：
文献类型：
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作者：
Suvra Shekhar Das;Muhammad Imadur Rahman;F. Fitzek
提出了一种新的多速率正交频分复用（OFDM）系统。它有望为下一代无线网络提供灵活的物理层支持。当在可用带宽约束内使用大量子载波时，它主要适用于载波间干扰受限的情况。该提议是通过对不同的子载波使用不同的带宽来改变OFDM系统中的子载波的否则均匀的性能。这在无线网络中的不同用户和数据信道将具有不同数据速率和服务质量要求的情况下是有利的。具有不同性能指标的不同子载波可以被映射到具有匹配要求的数据信道。该方案可以增强传统OFDM系统的灵活性。结果表明，使用不同的子载波带宽可以提高一些子载波的吞吐量在其他的成本。结果表明，整体系统性能也提高了与所提出的计划，即使没有任何最佳的映射数据流的子载波稍高的频率偏移。
A novel multi rate orthogonal frequency division multiplexing (OFDM) system is proposed in this paper. It is expected to provide a flexible physical layer support to next generation wireless networks. It is mainly suited to inter carrier interference limited situations, when a large number of sub carriers are used within the available bandwidth constraint. The proposal is to alter the otherwise uniform performance of the sub carriers in an OFDM system by using different bandwidths for different subcarriers. This is advantageous in the situation where different users and data channels in a wireless network will have different data rates and quality of service requirements. Different sub carriers with different performance figures can be mapped to the data channels with matching requirements. This scheme can enhance the conventional OFDM systems to become flexible. It is shown that, using different sub carrier bandwidths can improve the throughput of some sub carriers at the cost of the others. Results show that overall system performance also improves with the proposed scheme even without any optimal mapping of data stream to the sub carriers for slightly higher frequency offsets.
DOI：
--
发表时间：
1999-12
期刊：
--
影响因子：
--
作者：
R. V. Nee;R. Prasad
通讯作者：
R. V. Nee;R. Prasad