Millimeter Wave Wireless Communications Rappaport Pdf _VERIFIED_ Download

Millimeter Wave Wireless Communications Rappaport Pdf _VERIFIED_ Download

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Millimeter Wave Wireless Communications Rappaport Pdf Download

Recently, there has been a significant amount of work on millimeter-wave (mmW) wireless communication with numerous results on mmW physical layer studies. As we know, mmW band corresponds to a wide spectral range covering 300 GHz to 300 mm. In this paper, we are going to review the simulation results and channel characteristics of these works focusing on the effects of multipath, hardware impairments, and beamforming to improve the overall mmW communication performance.

Millimeter-wave (mm-wave) antennas are designed as highly directional antennas that radiate in narrow beam directions, as shown in Figure 1. As the frequency increases, the beamwidth of the antenna becomes narrower, making communication over shorter distances possible.

In order to study the interference scenario caused by mmW communications, we need to understand the beamforming mechanism in mmW. As mentioned before, the antenna beamwidth is very narrow in mm-wave compared to the radio frequency (RF) band. The radiation pattern of the antenna is mainly determined by the size of the aperture. As we know, the radiation pattern is a particular function of the size of the aperture, shapes of the antenna, and the shape of the antenna horn. One can assume that the angular radiation pattern of an antenna is a function of the logarithm of the aperture size. For example, the uniform circular beam pattern of a single circularly polarized antenna is given by Equation 1:

In this video training, Professor Rappaport starts by providing an overview to the basics in ultrawideband digital communications. He then introduces topics such as MmWave Propagation, ray tracing, Channel Models, and Antennas. He ends the first section with a discussion on RF and Analog Circuits and Systems for mmWave transceivers. In the second section, Professor Rappaport covers Ultrawideband Baseband circuits, Beamforming, Networking, and device discovery. He describes Modulation, Coding and Relay approaches for mmWave wireless. Finally, he ends the program with a discussion of current 60 GHz mmWave wireless LAN standards.

Polarised OAM beams created from SPPs can enable complete two-way applications and services in mm-wave wireless communications by implementing appropriate polarisation vector modulation and demodulation algorithms. One application example is that OAM waves can be used to transport digital data. A simple example of this is the ring-shaped intensity profile of the OAM beam. If data is transported by bits marked by a set of rings with an azimuthal intensity profile, any network that can realise the required polarisation vector modulation can decode the data.
Rappaport is the founding director of NYU WIRELESS, the worlds first academic research center to combine engineering, computer science, and medicine. Earlier, he founded two of the worlds largest academic wireless research centers: The Wireless Networking and Communications Group (WNCG) at the University of Texas at Austin in 2002, and the Mobile and Portable Radio Research Group (MPRG), now known as Wireless at Virginia Tech, in 1990. Rappaport is a pioneer in radio wave propagation for cellular and personal communications, wireless communication system design, and broadband wireless communications circuits and systems at millimeter wave frequencies.
Millimeter wave (mmWave) is todays breakthrough frontier for emerging wireless mobile cellular networks, wireless local area networks, personal area networks, and vehicular communications. In the near future, mmWave applications, devices, and networks will change our world.
One approach to generate and detect OAM millimetre-wave beams involves the use of spiral surface plates (SPPs), as shown in Fig. 1(a). At the transmitter end, a millimetre-wave OAM beam can be generated by propagating a beam with =0 through an SPP with an OAM number 7 . At the receiver end, another SPP with can be used to convert the OAM beam back to be a beam with =0 for detection. Figure 1(b) shows the ring-shaped intensity and spiral phase of the OAM beam wavefront with =+1 and =+3. It should be noted that given the same size of the initial beam of =0, OAM beams passing thought the SPPs with a higher value of will diverge faster. Figure 1(c) shows the simulation result of the one-dimensional (1-D) intensity profile of OAM beams with different values of at propagation distances of 1m and 2.5m. The frequency of the millimetre wave is 28GHz, and Gaussian beams (=0) are emitted from the lensed horn antenna with a diameter of 15cm. In the simulation we assume the Gaussian beam has a beam width of 7.5cm. The diameter of the SPP is 30cm. It is noted that mm-wave frequency range is usually defined from 30GHz300GHz. However, in wireless communications, a 28GHz carrier frequency is also considered as mm-wave communications 16 .

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