A precoding scheme for DFT-based OFDM to suppress sidelobes
A precoding scheme for DFT-based OFDM to suppress sidelobes
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DOI：
10.1109/lcomm.2009.091339
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发表时间：
2009-10
期刊：
影响因子：
--
通讯作者：
Renhui Xu;Ming Chen
中科院分区：
文献类型：
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作者：
Renhui Xu;Ming Chen
在频谱池情况下，基于DFT的OFDM信号的频谱泄漏可以分为带内-带外-子带（IBOSB）辐射和带外（OOB）辐射。提出了一种抑制IBOSB旁瓣的预编码方案。预编码设计基于广义特征值问题。仿真结果表明，与未编码的方案相比，该方案可以有效地抑制旁瓣。同时，由于频率分集的存在，预编码系统在多径衰落信道下的误比特率（BER）性能得到了改善。
In spectrum pooling scenario, the spectral leakage of DFT-based OFDM signal can be divided into in-band-out-of-subband (IBOSB) radiation and out-of-band (OOB) radiation. A precoding scheme is proposed to suppress the IBOSB sidelobes. The precoding design is based on the generalized eigenvalue problem. Simulation results demonstrate that the proposed scheme can suppress the sidelobes significantly in contrast to the uncoded schemes. At the same time, the bit-error-rate (BER) performance of the precoded system over multipath fading channel is improved due to the frequency diversity.