Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [5g]

5g wireless cellular communications systems - the 5th generation

Generations in wireless cellular systems -

  1. 1G - Analog systems like the Advanced Mobile Phone System in the US
  2. 2G - First digital systems like Global System for Mobile telecommunications (GSM)
  3. 3G - wideband CDMA systems with increasing support for data communications
  4. 4G / LTE - data-first (voice even goes over IP, rather than traditional circuit-switched voice), with OFDMA for resource management over the air - mobile broadband services are well supported
  5. 5G - builds on LTE to add support for Ultra-Reliable Low Latency Communications (URLLC), IoT (internet of things), V2X (vehicular comms), etc., in addition to mobile broadband services; network functions virtualization, etc., in the core network
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How does the current processor technology with low clock rates (<10 GHz) deals with mmWave (>10 GHz) technology used in 5G?

What I mean is that most abundant computing processors in market have the clock frequencies in the range of 2-4 GHz and from wikipedia: As of 2012, the CPU-Z record for the highest CPU clock rate is 8.79433 GHz on an AMD FX-8350 Piledriver-based…
lousycoder
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5G and Radar Altimeter Interference - Am I Taking Crazy Pills?

I can't understand where the math supports the concept of 5G frequencies interfering with aircraft altimeters. Can anyone point out the holes in my logic or educate me? Knowns: Aircraft altimeter frequency range: 4.2 - 4.4 GHz Closest 5G…
1337_Pawn
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What is meant by 5G NR "Physical" layer?

I am rote-learning 5G NR concepts for a job interview. In 5G NR, we have something called a Physical layer. Wikipedia defines physical layer as: The physical layer defines the means of transmitting a stream of raw bits over a physical data link…
MAJID AHMAD
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RF direction finding

Is it possible to build a system of antennas to find the rough direction of a radio frequency emitter such as a WiFi router, a Bluetouth tag, or, a 5G cell tower? I cannot use distant antennas to use triangulation. If several antennas are needed,…
oli
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Using WiFi Antenna for 5G Mobile Network?

I moved to an apartment located in a basement of a complex. I had to build a setup with a set of 2 external LTE (4G) antennas Wilson Electronics Wideband Directional Antenna 700-2700 MHz Wilson Electronics 4G Omni Residential Antenna 700-2700…
0x00FE
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Noise in mm-wave initial access frameworks

I have a doubt about Initial Access (IA) procedures in mm-wave system. In most papers I have read (see e.g. Initial Access in 5G mm-Wave Cellular Networks), most of the alignment procedures assume that an exhaustive search (or some iterative…
Apprentice
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How to compute a data rate "loss"?

I am studying 6G communication. There are a lot of publication about it, frequency, latency, BW and other KPIs.[1],[2] Now one of the most popular research topics is an integration non-terrestrial network in 6G: satellite, HAP, LAP, … If we…
Aid22
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How to compute link budget in a system with aero/space-borne integration

I am studying a system in 5G which are represented as a combination terrestrial and non-terrestrial network (including satellite segments or HAP/LAP) [5G NTN] it is a unified terrestrial aerospace network = a space segment- ground station - user…
Aid22
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Acquiring the PSS & SSS: from a UE perspective

I have been reading LTE materials of late and stumbled upon the process of UE initial procedures to attach to the LTE network. The procedure starts with searching a suitable cell. The UE first scans frequencies and then selects an appropriate PLMN,…
Kaswechiha
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Layer Mapping & Antenna Ports in LTE PDSCH layer processing

I am reading LTE materials recently, and came across the antenna port term. I am quite clear about the term, however, what does a layer mapping exactly mean? Does 'layer' correspond to a logical channel/physical channel/communication pipe for the…
Kaswechiha
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Why in MISO, SISO, MIMO definition Input is Transmitting antennas not the receiving ones?

This is a definition for SIMO in the reference below: "The SIMO or Single Input Multiple Output version of MIMO occurs where the transmitter has a single antenna and the receiver has multiple antennas." As I understand when transmitting a signal,…
Sunfarm
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Does it take more power (battery-life) to stream video or to do local video processing?

I have a raspberry pi with a camera. I want to take analytics from the video (mostly object detection). This doesn't have to be run in real time and the RPI doesn't need the output of the video processing. What I'm wondering is if it would take less…
Tyler Hilbert
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Can I use a 5G antenna on my 4G router and get 5G speeds or do I need a 5G router

I have a Huawei B535 4G router at home. The SIM card sitting in it and the subscription also supports 5G. Will it be enough to just add an external antenna like this one: https://triax.com/shop/en/o5a-06w-omnidirectional-5g-antenna-109602 to get 5G…
Niels Kristian
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5G and aircraft?

I just read the statement of a company, "We are frustrated by the FAA’s inability to do what nearly 40 countries have done, which is to safely deploy 5G technology without disrupting aviation services, and we urge it do so in a timely manner" But…
riccs_0x
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