Questions related to Mobile Communications
Could any one please help me in suggesting some resources where I could find a comparison curve between signal strength after Multi Path propagation effect with respect to obstacle positions between transmitter and receiver.
After conduction some experiment I found that the effect was greater near Rx or Near Tx but lesser when the obstacle is in same distance from Rx and Tx. Why such phenomena happens?
I want to parse signals coming from 4G/5G towers to extract only the ID of the tower and the transmission time (on simplex communication: only downlink). Are these packets (or frames) sent on a regular time interval ?
I have designed one mobile antenna. When is I was trying to calculate the SAR values for this antenna I got an error "the total mass (0 g) smaller than selected SAR averaging mass? Please select smaller average mass". Did anyone encounter this type of error while calculating SAR value? If yes please help me how I can get a SAR value.
I have initiated an intervention in 2 communities in an area where suicide rates are very high. I will be initiating the same approach in 2 villages in another district where suicide rates are high. I am doing a literature search on intervention for suicide prevention and so far have not found anything. I am approach this initiative as part of the participatory action research paradigm.
In 5G, the mixed-numerology is introduced to support diverse QoS requirements. It is also mentioned in the spec that simultaneous transmission and reception with different numerologies in CA is possible.
However, there is few materials mentions how this is achieved. Does a UE requires multiple antennas to transmit with resources of different numerology at the same time? Or it can be done by a single antenna? If the latter is the truth, how does a UE deal with different SINR values generated by resources with different numerologies? (different SINR values lead to different modulation scheme, how can this be done with single antenna?)
I have found one paper that is related to my question:
It seems that a UE can deal with resources with different numerology simultaneously, with different modulation scheme. Yet, this paper does not show how this is achieved by the smartphone.
we imply that 5G should not be considered as merely an
evolutionary development of previous mobile systems, but should be considered as
a completely new paradigm in mobile communications. why?
I am trying to obtain closed-form expressions of outage probability for a user in a given cell. Here I am including inter-cell interference (from other adjacent cells) in the expression of SINR. Now I need to obtain the closed-form expressions of outage probability over a fading channel like Nakagami or Rayleigh. Please suggest any information regarding this. thanking you
Hi I a doing a Phd in mobile communication .i am facing too much problem to understand the math equations. the main problem is how to use the equation for my work .i am working on Massive Mimo channel estimation and pilot contamination. how i can setup my data from scratch please some one help me how should i start .send me some example if you people have to understand how the data is taken and analyze .Plzzzzzzz need a Help if some one can. waiting for your prestigious advise and help
The information industry have created a new species, Homo online. Members of this species are connected to various communication systems all the time: they communicate for the sake of communication. It is normal to communicate with other people, but to be constantly online is mentally exhausting and it hinders the development of an independent person. I could not read or write efficiently and with pleasure without silencing the devices around me that could interrupt my thoughts at any moment and for any reason. But Homo online has prevailed, and Homo sapiens has become a species in extinction.
with a well known fact that the success of the 5G technology vastly depends on how well it fared in indoor venues, with analysts claiming that more than 80% of mobile use and tearric originates indoors, what are the available specialized solutions that can make the technology succeed indoors, while keeping both its QoS possible health hazards in check.
I am new to in NS3. I am working on LTE networks. I was looking for calculation of Load information of each cell and exchange of the same between eNBs (over X2 interface/ based handover). Could any one please help me with pointers to code, or if you already have the code snippet.
I did search through the docs. But still needed some additional help. Could you please help me.
Is it possible to calculate the number of RBs allocated to the UE in NS3?.
I am looking simple method to design 1*16 microstrip power divider for wideband (impedance bandwidth 5GHz) at 30GHz. Please suggest me easy method to design power divider for wideband applications.
Thank you very much
By using the Narda SRM 3006 device to measure electromagnetic radiation:
-What is the period of time required for each location or spot to measure?
-How can I insert and name frequencies whether for radio broadcasting, television, mobile communications and wireless communications?
- What are the conditions required necessarily when measuring?
- Some researches say that a person should turn off the transformer while measuring. Other researches say that a person can receive a phone call during measuring. Though I think that switching the mobile off is the right choice. So, What do you think?
-Finally, can we transfer data from the device to the computer in a form of an excel file?
I hope the experts in this field answer me please
Where we are going ,in which direction
Is this phase of life will leads to on online,mobile communication but one to one communications is going towards ..........
The mobile cellular communication uses 4G Long Term Advanced Evolution (LTE-A) technology which is a platform for 5G technology.
The fundamentals of D2D communication is to utilize mobile devices as relays that are placed between source and destination. The D2D system is the communication between two adjacent cellular devices by reusing the cellular spectrum without having to do routing to the base station. The D2D communication systems can increase capacity with the shared use of frequency sources between conventional cellular users and D2D users. It also increases the data rate due to the close communication distance.
G. Fodor, et al., “An Overview of Device-to-Device Communications Technology Components in METIS,” IEEE Access vol. 4, pp. 3288- 3299, 2016.
C. Yang, T. Jiang, and C. Wang, “cooperative device-to-device communications in cellular networks,” IEEE Wireless Communications, vol. 22, pp. 124-129, June 2015.
S. Chen, S. Sun, Y. Wang, G. Xiao, R. Tamrakar, “A comprehensive survey of TDD-based mobile communication systems from TDSCDMA 3G to TD-LTE(A) 4G and 5G directions,” China Communications, vol. 12, no. 2, pp. 40-60, 2015.
With fast growth of mobile communication network, 5G technology has been officially on use. As we all know that 5G can provide extremely wider bandwidth and faster internet speed than 4G. 5G network is absolutely able to transmit high definition media in real-time application, so is it really necessary to compress image or video?
Different companding methods such as μ-law, hyperbolic tangent, exponential, linear symmetric transforms, linear asymmetric transforms and threshold log companding are used for PAPR reduction in OFDM.
Is there any other efficient companding methods?
Besides, is there any other method of PAPR reduction in OFDM except companding?
I have identified some technologies that enable the 4th and 5th generation of wireless mobile communications. However, I wonder if there are some other missing technologies in this list, or if some technologies in this list are not really that important for 4G and 5G.
- Smart antennas
What is your opinion? Thank you in advance.
it will be useful for removing such pockets for making mobile communication more effectively.
I had the thought today about Facebook, Twitter, and many other online/mobile platforms which continually feed us "top posts" or content based on location.
I don't like this because I like to select my own content. Today I realized that this could be related to self-efficacy. I feel that I have high self-efficacy and therefore I like to select my own content.
People who blindly accept the content "served" to them become functionally helpless, which aligns with low self-efficacy. Of course, it is possible to overcome these content defaults, but it is harder to do, particularly on mobile devices.
In my mind, this may align with stereotypes of the young people in the US who are just transitioning from teenager to adult. The stereotype is that over-protective parents have shielded them from any hint of failure, so they have never learned to solve problems on their own.
So my question is whether lack of choice in our social media feeds contributes in any way to an overall lack of self-efficacy in people today.
1) How to Reduce the mobile radiation without affecting the effective mobile communication ??
2) How to Reduce the specific absorption rate (SAR) of bio-tissue of electromagnetic radiation found in cellular communication ??
** I want to start in this field but I do not know how to start and I want help. I want to participate with researchers in this field .
1) How can I Reduce the mobile radiation without affecting the effective mobile communication ? .
2)How can I Reduce the specific absorption rate (SAR) of bio-tissue of electromagnetic radiation found in cellular communication ?
**I want to start in this field but I do not know how to start and I want help
**I want to participate with researchers in this field
What is the practical operating frequency of FEMTOCELL. What kind of antenna (arrays) is used in the recent models and what is the range?
One of the threat to humanity is THE emergence intelligent machines. When AI gets full control and when sky-net comes to exist....might be already there, ....the plan is to enslave humanity rather than making things easy for him. I know, soon the robots replace many employees and do many complicated jobs including industry works, medical works (complicated surgery, scanning etc), cooking, nuclear and other energy sector operations, care works for child and elderly etc.
Machines are smart and fast; they don't get tired, they don't do random (ie they are error free). They are very adaptive, capable of evolving abruptly and are self aware. Machines spy on humans 24/7, on every little corner of the earth due to the emergence of 5G which gives them this ability, the ability to track and identify everyone for every space-time on the glob with their direct satellite connection...and this means the end of human privacy. I have no idea what the fate of human being will be in such times.
Making human half machine half human (cyborg), a bio-mechanical being is one application of this field to create superhuman soldiers. Many countries including Russia, US, china, UK are using such technology side by side with their genetic engineering research to strengthen their military. They are always up to humanity, to destroy the human race from the face of the earth in every way possible.
5G is a key together with AI for all these to succeed. 5G towers are already in place to begin work in US and UK (some are already in operation). 5G has a data speed of 100 times that of the 4G network system and the towers should be installed very near to the client residents as it work in very short distance point to point communication. It uses very short wavelength or very high frequency which obviously expected to cause caner and other serious side effects on any living cell due to its high frequency microwave radiation. I know many people are not aware of the downside of such technology and the potential damage it might cause. It is my belief that 5G radiation is responsibly the cause for the massive death of birds and other animals near to such towers in US. The towers look like this, you might find one of these on your building or neighborhood.
I would like to know what you think about 5G network and the technology related with it.
The non-linearity of power amplifier limits the power output efficiency. So, we can use DPD technique to improve it. But we need to know the power amplifier with the memory effect or memory-less. I hope that i can use some kind of test or experiment to verify it.
Here, I want to make an array of metamaterial microstrip patch antennas for mobile communication to enhance bandwidth and gain. I plan to use HFSS tool for the simulation part.
So, would you help me in directing the ways to follow by any means?
A narrow waves - short time (in nanoseconds) -short distance - wide bandwidth 3.1 to 10.6 - low power emission is very attractive for antenna designers, But will it be in some how has a benefits for 5G applications?
I am try to do a project on Routing Optimization in mobile communications. What question should I ask so as to what direction to follow in getting the best result for my project?
My question regards the real necessity to have subframe (3GPP Rel. 12) or slot (3GPP Rel. 13) aligned transmissions in the unlicensed band.
According to TR 36.889: "Channel reservation refers to the transmission of signals, by an LAA node, after gaining channel access via a successful LBT operation, so that other nodes that receive the transmitted signal with energy above a certain threshold sense the channel to be occupied." This signal is transmitted until the next subframe or slot boundary is reached so that transmissions are aligned.
The channel reservation signal defined by the 3GPP standard adds an overhead to LTE-LAA transmissions that impact on its performance. If there were no necessity for any kind of time alignment to the PCell the SCell performance could be increased.
Therefore, my question is, what would be the possible implications to all LTE layers if the transmissions were not aligned at all?
Our research team wants to do a work to assess the importance of public and private communication systems (social networks, websites, blogs, scientific forums, among others) to foster collaboration with scientists from a country abroad and support their return. I would be grateful if you could provide us references of this interesting topic.
i've noticed that majority of engineers are focusing on the technical side of development of telecom equipment either in mobile communication or any other sub-field , compared to computer networking ,engineers do their best to develop new security solutions !
i don't understand why there's always this lack of interest in security field in telecom !!
My name is Profir Victor.
I study telecommunication master's Technical University Gheorghe Asachi Iasi, Romania.
I need help, my final diploma is on the subject - LTE Advanced Pro: Effective solutions for modern communications systems
I need documentation on LTE Advanced Pro:
- Problems and solutions for today's mobile communications systems.
- Mobile Network Architecture.Evolution LTE-A pro toward 5G.
- Carrier Aggregation in LTE-Advanced Pro.
Different BSs are having varying transmit powers. So I want to know What is the probability that only one BS, two BSs , three BSs ...., are in the range of a User Equipment.
Please refer me if you have any reference paper or book to read.
Thanks in advance.
In 2G and 3G, challenge response method is used to authenticate the mobile SIM. SIM computes SRES for each RAND and sends to Authentication center for authentication. A suite of algorithms are used to compute SRES in 3G. How 4G LTE implements authentication? What algorithms are used?
A signal is transmitted by the transmitter and multiple rays arrive at the receiver as a result of reflections (from the flat obstacles), diffraction (from the edges of obstacles) and scattering.
How do I find the number of clusters in this condition?
Looking for a way to measure, record, and export raw acceleration from the smart phone's internal accelerometer.
Currently, OFDM seems to be the dominant modulation/multiple access scheme in wireless/mobile communications systems. However, research platforms such as Horizon 2020 suggest that the targeted systems for 5G should be significantly more frequency efficient and 10 times more power efficient than the 4G counterparts. It looks like all B4G and 5G trials are stuck with the same level of frequency and power efficiency as the 4G ones.
I have modeled proportional fair (PF), round robin (RR) and best CQI (BCQI) scheduler. I have calculated the fairness of the schedulers using the users throughput. Now, I want to compute the latency of the schedulers.
How can I calculate the latency?
I want to simulate the several traffic models and evaluate their performances in terms of UE throughput.
I have gone through many literature's but ended up on their theoretical aspects only.
Are there any links or journals or textbooks available that deals with their theory and the associated equations?
I need to compare my data with existing mobile phone ratings, however, i am not able to find any mobile ratings dataset. Their exist mobile datasets related to signal coverage but not related to how users like a mobile phone or how do they rate a mobile phone.
Can anyone give some idea about the smallest unit of resource that can be assigned to a user in 5G cellular networks? Like in LTE-A it’s known as PRB so what is in 5G?
I need data related to wireless resource management and interference mitigation for 5G mobile networks. if someone have please share with me.Thanks
Major difference in modelling LTE Carrier Aggregation and LTE-WIFI link assisted access (LAA)?
Could UWSim be used for designing pure networking stuff e.g. routing and mac protocols, localization techniques etc? I want to implement a localization technique for mobile underwater sensor networks. For this I expect my simulator to provide me with channel model, mobility model and a mac protocol for underwater sensor networks. Does UWSim provide all these? Is it a good idea to use UWSim for my work?
Dear experts, I am a computer scientist and I know that there is some schemes to perform location-updates/page of mobile users within a cellular network. I would like to know if these schemes are standard (i.e. in all generations) or are specific to each generation ?
Hi everyone, I have the masurement channel transfer function for 24 x 24 MIMO channel (point-to-point MIMO). From UCA antenna, dual polarized (12 elements). Basically I want to simulating the large array from these array results, any idea to extrapolate so I can have, let's say 128 x 24 MIMO, etc. Thanks!
I'm interested in the fusion of GPS and WiFi for outdoor and indoor localization. i need the data set of GPS signals (longitude , latitude and altitude) in outdoor area, and the RSSI data set of WiFi access points in indoor environments.
Campbell, S., & Kwak, N. (2011). Mobile Communication and Civic Life. The Routledge Companion to Mobile Media.
In WiMAX communication Scenario ,user is moving at 100km/hr and source is stationary and 64 QAM modulation technique is applied to it , but the BER is more as compared to 16QAM . how can we minimize this to lower level
I want to enhance my proposed protocol by using cooperative routing and in a specific condition forward data to the destination cooperatively through a relay node.
I just know that the direct path include the least number of retransmission.
In What condition, it would be a better idea to use cooperative links to send data through the destination?
(I should mention that link metrics are important not node metrics)
There are three Sectors (each at azimuth of 60, 170, 240 degree) of a telecom Site. Now we require to predict the coverage plots from each Sectors. For this we can use HATA modified algorithm for urban/rural areas. But the issue is to get coverage plots from each Sector in the definite azimuth and beamwidth. Following parameters needs to be taken for predicting coverage from Sector: Power Transmitted, Power Gain, Height, Distance, Azimuth, Beamwidth and optional Terrain Heights, Clutter etc.
Is there any idea/algorithm for predicting coverage from Sectors using any propagation model?
I really want to know regarding the handover management in 5th Generation Wireless communication network. Moreover how it could be handled in heterogeneous cloud radio access networks?
The number of wireless devices that use 2.4GHz ISM band can effect on Wireless sensor network using the same frequency band. For that reason, we have to investigate that kind of interference.
I am researching on enhanced method to mitigate intermodulation distortion and sideband noise in a co-located wireless network. I thought of introducing hybrid fixed filtering and adaptive cancellation technique
For me it is not clear which model we should use in Matlab simulation to model the fading channel of mobile communication. Because the transceiver is moving, some times you have LOS component in others you don't have it. So, the channel model should vary with time in random nature from Rayleigh to Racian to Rayleigh and so on. Is that true and applicable?