millimeter wave bookNYU Wireless has just reported on 14,000 tests using 28 GHz and 73 GHz indoors. The paper isn't online yet so I put the abstract below. Professor Ted Rappaport believes, "These high frequencies will be an effective substitute when today's Wi-Fi frequencies get crowded."

The FCC is about to set aside some high frequencies for telco use. My opinion, not Ted's is that monopoly spectrum is obsolete. Wi-Fi is proving sharing is possible and productive.  Some monopoly spectrum is needed where reliability is important, but the 100 MHz Sprint, AT&T and Verizon each have is plenty.

Ted makes an important point.  "I think the FCC would do well to also authorize unlicensed bands in the near vicinity of that new mmWave spectrum.

This would relieve the design burden on chip makers, and provide greater bandwidth pipes. As we stated in our FCC comments, we hope that the FCC will open up giant swaths of unlicensed spectrum above 100 GHz, like it opened up the ISM bands in the early 1980s to usher in the Wi-Fi revolution." 

His comments are from an interview I did for the Marconi Society, now being edited. 

 

Indoor Office Wideband Millimeter-Wave Propagation Measurements and Channel Models at 28 GHz and 73 GHz for Ultra-Dense 5G Wireless

George R. MacCartney, Jr., Student Member, IEEE, Theodore S. Rappaport, Fellow, IEEE, Shu Sun, Student Member, IEEE, Sijia Deng, Student Member, IEEE

Abstract—Ultra-wideband millimeter-wave (mmWave) propagation measurements were conducted in the 28 GHz and 73 GHz frequency bands in a typical indoor office environment in downtown Brooklyn, New York on the campus of NYU.

The measurements provide large-scale path loss and temporal statistics that will be useful for ultra-dense indoor wireless networks for future mmWave bands. This paper presents details of measurements that employed a 400 megachips-per-second broadband sliding correlator channel sounder, using rotatable highly-directional horn antennas for both co- and cross-polarized antenna configurations. The measurement environment was a closed-plan in-building scenario that included line-of-sight and non-line-of-sight corridor, hallway, cubicle-farm, and adjacent-room communication links. Well-known and new single frequency and multi-frequency directional and omnidirectional large-scale path loss models are presented and evaluated based on more than 14,000 directional power delay profiles acquired from unique transmitter and receiver antenna pointing angle combinations.

Omnidirectional path loss models, synthesized from the directional measurements, are provided for the case of arbitrary polarization coupling, as well as for the specific cases of co- and cross-polarized antenna orientations. The results show that novel large-scale path loss models provided here are simpler and more physically-based compared to previous 3GPP and ITU indoor propagation models that require more model parameters, yet offer very little additional accuracy and lack a physical basis. Multipath time dispersion statistics for mmWave systems using directional antennas are presented for co-, cross-, and combined-polarization scenarios, and show that the multipath root mean square delay spread can be reduced when using transmitter and receiver antenna pointing angles that result in the strongest received power.

Abstract—Ultra-wideband millimeter-wave (mmWave) prop-agation measurements were conducted in the 28 GHz and 73
GHz frequency bands in a typical indoor office environment
in downtown Brooklyn, New York on the campus of NYU.
The measurements provide large-scale path loss and temporal
statistics that will be useful for ultra-dense indoor wireless
networks for future mmWave bands. This paper presents details
of measurements that employed a 400 megachips-per-second
broadband sliding correlator channel sounder, using rotatable
highly-directional horn antennas for both co- and cross-polarized
antenna configurations. The measurement environment was a
closed-plan in-building scenario that included line-of-sight and
non-line-of-sight corridor, hallway, cubicle-farm, and adjacent-room communication links. Well-known and new single frequency
and multi-frequency directional and omnidirectional large-scale
path loss models are presented and evaluated based on more
than 14,000 directional power delay profiles acquired from unique
transmitter and receiver antenna pointing angle combinations.
Omnidirectional path loss models, synthesized from the directional
measurements, are provided for the case of arbitrary polarization
coupling, as well as for the specific cases of co- and cross-polarized
antenna orientations. The results show that novel large-scale path
loss models provided here are simpler and more physically-based
compared to previous 3GPP and ITU indoor propagation models
that require more model parameters, yet offer very little additional
accuracy and lack a physical basis. Multipath time dispersion
statistics for mmWave systems using directional antennas are
presented for co-, cross-, and combined-polarization scenarios,
and show that the multipath root mean square delay spread can
be reduced when using transmitter and receiver antenna pointing
angles that result in the strongest received power.

Newsletter

Often interesting

Latest issue

 Gig LTE & Massive MIMO ushering in the Age of Wireless Abundance

Wireless Abundance is here: What the new tech means http://bit.ly/Wirelessabundance
Sprint & T-Mobile Charge to be 1st in U.S. to Gig LTE bit.ly/STMOgig  AT&T bit.ly/ATTGIG2016
Kitahara of Softbank “I am crazy about Massive MIMO” http://bit.ly/MMIMOCrazy
20 Gig mmWave, Massive MIMO & Gig LTE at the Huawei MBBF http://bit.ly/Huawei20
LTE gets to the gigabit explained for non-engineers http://bit.ly/GigLteexplained
Massive MIMO explained. http://bit.ly/WHMassiveMIMO
2017's Big Gigabit story: Qualcomm 835 is ready http://bit.ly/BigGigLTE
Doubling speed with 4x4 MIMO & 256 QAM at T-Mobile http://bit.ly/2k1gEOQ
Netgear Nighthawk M1, Telstra do "gigabit class" LTE http://bit.ly/2k1s5Gq
Spectrum price down by half http://bit.ly/Spectrumhalfoff
Dish and the telcos see big asset cut http://bit.ly/auctionlosers
Shorts on 3GPP,  NYU research, Ralph de la Vega, 5G new radio

Read more ...

5GW News

dave right5G? 4G? Whatever the name, wireless is going to a gigabit, soon.  I've reported broadband since 1999 and now is the time for gigabit wireless. Catch a mistake or have news? Email me please. Dave Burstein

 

Stories worth writing

Starry may match Verizon 5G at half the cost
OFCOM in UK: Share all spectrum, even licensed
OFCOM's Boccardi: 26 GHz worldwide: U.S. goes 28 
Verizon 5G fixed tests will be only 100's of homes
Massive MIMO FD at China Uni, Tele, Huawei, ZTE

 

 

 

Datapoints

Verizon and AT&T burying price increases in fees. 

Huawei's Richard Yu intends to pass both Apple & Samsung in smartphones in five years. 

The 3,000,000,000 transistor Qualcomm 835 is a revolution. Gig LTE, incredible cameras, better VR & AR, & ... State of the art CPU, DSL, GPU, ISP tightly integrated

1,000 T-Mobile small cells 2016, 6,000 more coming. Tech Life

New $84 Reliance Lyf Wind 7S has a 5" screen, a quad-core Snapdragon, an 8 megapixel camera, and some extras. Not state of the art, perhaps, but completely usable at a modest price. 

Orange/FT 4G covers 97% of Poland, 96% of Moldova, but only 84% in France, Q3 2016. They have 113.5 mobile customers in Africa compared to 25.5M in Europe.

more

Read more ...