Optimal waveforms design for ultra-wideband impulse radio sensors.
Optimal waveforms design for ultra-wideband impulse radio sensors.
复制标题
超宽带脉冲无线电传感器的优化波形设计
DOI:
10.3390/s101211038
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发表时间:
2010
期刊:
影响因子:
--
通讯作者:
Zhao C
中科院分区:
文献类型:
--
作者:
Li B;Zhou Z;Zou W;Li D;Zhao C
Ultra-wideband impulse radio (UWB-IR) sensors should comply entirely with the regulatory spectral limits for elegant coexistence. Under this premise, it is desirable for UWB pulses to improve frequency utilization to guarantee the transmission reliability. Meanwhile, orthogonal waveform division multiple-access (WDMA) is significant to mitigate mutual interferences in UWB sensor networks. Motivated by the considerations, we suggest in this paper a low complexity pulse forming technique, and its efficient implementation on DSP is investigated. The UWB pulse is derived preliminarily with the objective of minimizing the mean square error (MSE) between designed power spectrum density (PSD) and the emission mask. Subsequently, this pulse is iteratively modified until its PSD completely conforms to spectral constraints. The orthogonal restriction is then analyzed and different algorithms have been presented. Simulation demonstrates that our technique can produce UWB waveforms with frequency utilization far surpassing the other existing signals under arbitrary spectral mask conditions. Compared to other orthogonality design schemes, the designed pulses can maintain mutual orthogonality without any penalty on frequency utilization, and hence, are much superior in a WDMA network, especially with synchronization deviations.
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DOI:
10.1109/4234.660796
发表时间:
1998-02-01
期刊:
IEEE COMMUNICATIONS LETTERS
影响因子:
--
作者:
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DOI:
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DOI:
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2003-05-01
期刊:
IEEE COMMUNICATIONS LETTERS
影响因子:
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通讯作者:
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DOI:
10.1109/tmtt.2006.872046
发表时间:
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影响因子:
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