Showing 5,321 - 5,340 results of 12,943 for search '"7 d'Or"', query time: 0.14s Refine Results
  1. 5321
  2. 5322
  3. 5323
  4. 5324
  5. 5325
  6. 5326

    Double-component combined generalized weighted fractional Fourier transform based waveform design for massive MIMO by Xingjian LI, Zhiqun SONG, Yong LI, Lizhe LIU, Bin WANG, Chang WANG

    Published 2023-12-01
    “…In order to overcome the drawback of conventional diversity technologies that sacrificing valuable communication resources such as data rate or bandwidth in massive multiple input multiple output (MIMO) systems, a double-component combined generalized weighted fractional Fourier transform (DCGWFRFT) based waveform design method was proposed.The concept of computational diversity was introduced, and the diversity performance was improved via moderate computational resources without requiring channel state information at the transmitter.The principle of computational diversity of DCGWFRFT based waveform was firstly analyzed, and a DCGWFRFT based waveform design and transform process, which could be adopted combined with existing diversity methods, was then proposed according to the principle.Theoretical analysis proves that the proposed waveform design and transform process can perfectly recover the original transmitted signal in noise-free case, and the power of error of proposed waveform is distributed more evenly than that of untransformed waveform in noisy case.Simulation results show that the performance of DCGWFRFT based waveform has an advantage of at least 1.7 dB in bit signal-to-noise ratio compared with untransformed waveform when bit error rate is 10<sup>-3</sup>.…”
    Get full text
    Article
  7. 5327
  8. 5328

    Microstrip Folded Dipole Antenna for 35 GHz MMW Communication by Guang Hua, Chen Yang, Ping Lu, Hou-Xing Zhou, Wei Hong

    Published 2013-01-01
    “…The measured results show that a miniaturized antenna has the bandwidth of more than 14.2% (VSWR ≤ 2); gain of the antenna is 5.7 dB at 35 GHz.…”
    Get full text
    Article
  9. 5329
  10. 5330
  11. 5331
  12. 5332
  13. 5333
  14. 5334
  15. 5335
  16. 5336
  17. 5337
  18. 5338
  19. 5339
  20. 5340