...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geoscience and Remote Sensing, IEEE Transactions on >MIMO SAR OFDM Chirp Waveform Diversity Design With Random Matrix Modulation
【24h】

MIMO SAR OFDM Chirp Waveform Diversity Design With Random Matrix Modulation

机译：随机矩阵调制的MIMO SAR OFDM Chirp波形分集设计

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) has received much attention due to its interesting application potentials, but effective waveform diversity design is still a technical challenge. In a MIMO SAR, each antenna should transmit a unique waveform, orthogonal to the waveforms transmitted by other antennas. The waveforms should have a large time–bandwidth product, low cross-correlation interferences, and a low peak–average ratio. To reach these aims, this paper proposes an orthogonal frequency division multiplexing (OFDM) chirp waveform with random matrix modulation. The designed waveforms are time-delay and frequency-shift decorrelated. Referring to MIMO SAR high-resolution imaging, the proposed OFDM chirp waveform parameters are optimally designed, and their performances are analyzed through the ambiguity function and range-Doppler-based MIMO SAR imaging algorithm. Extensive and comparative simulation results show that the waveforms have the superiorities of high range resolution, constant time domain and almost constant frequency-domain modulus, large time–bandwidth product, low peak–average ratio, and low time-delay and frequency-shift correlation peaks. More importantly, this scheme can easily generate over three orthogonal waveforms with a large time–bandwidth product.
机译：多输入多输出（MIMO）合成孔径雷达（SAR）由于其潜在的应用潜力而备受关注，但是有效的波形分集设计仍然是一项技术挑战。在MIMO SAR中，每个天线应发送一个独特的波形，该波形与其他天线发送的波形正交。波形应具有较大的时间带宽积，较低的互相关干扰和较低的峰均比。为了达到这些目的，本文提出了一种具有随机矩阵调制的正交频分复用（OFDM）线性调频波形。设计的波形与时延和频移去相关。结合MIMO SAR高分辨率成像，对提出的OFDM chirp波形参数进行了优化设计，并通过模糊函数和基于距离多普勒的MIMO SAR成像算法分析了其性能。大量的和比较的模拟结果表明，这些波形具有以下优点：高范围分辨率，恒定时域和几乎恒定的频域模量，较大的时间带宽积，较低的峰均比以及较低的时延和频移相关性高峰。更重要的是，该方案可以轻松生成三个具有较大时间带宽积的正交波形。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号