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53 Threads found on Gsm Wcdma
Hi marya2 As you know unlike the gsm in UMTS (i.e mainly wcdma) you should consider the network load to determine the cell radius and you cannot use the simple link budget formula. Take a look at
Hello, Dear all There is a useful android app that i created yesterday. Name: RF BAND CONFIG 102282 With those functions For RF engineer to design circuit easily with referred list including High,Mid and Low channel. ##Support gsm four band, ALL wcdma(1~29), ALL TDSCDMA(A-F), LTE(1-31),
Dear all, Wish you a nice day! This is lily zhao, international sale manager from Antetec Technologies Ltd (ISO9001:2000) in Beijing, China. Antetec Technologies Ltd is a factory, specialised in designing and producing external/embedded antennas, up to 6000MHz, used in gsm, 3G, CDMA, wcdma, CDMA2000, TD-SCDMA, WLAN wireless equipment
Hi Guys, I am working on a project that require me to develop a device which will scan limited spectrum detect gsm, wcdma or LTE signal and then record the signal strengh, pilot number and signal quality. Any suggession?
Your initial statement was correct. wcdma ETSI spec (as well gsm and LTE all are the same) have requirements for spurious emissions outside of the band (including harmonics) as in the table below. These are system requirements for out-of-band spurious emissions, so if a PA fail this spec, doesn't mean cannot be used. wcdma systems (...)
Doubt there might be one since simply listening to any engineering topic doesn't really work but does anyone know of any podcasts about LTE and its releases or other radio access technologies like wcdma or gsm ? :grin:
Hi everybody, Who knows 3G RF Planning and Optimization Software(UMTS/gsm/wcdma)? Where can I download the free software?Thank you!
hello edaboard members, i want matlab code for simulate 3 wireless network. i want to simulate inter system handover from gsm to wcdma and wcdma to gsm. how will i detect call drop and how i can measure this in inter system handover,, plz help me.. send me sugesstion in detailed document.. thanks (...)
Hi,everyone,I am Stephen from China,we supply wireless module and GPS tracker gsm/GPRS Module: SIM900/SIM900A/SIM900B/SIM900D wcdma/HSPA Module:SIM5215/SIM5216/SIM5218/SIM5320 GPS Module:SIM08/SIM18 Short-Range Module:SIM20 GPS trackers: Vehicle Locator GV100 Child GPS phone GT200 Personal GPS mobile phone GT300 Pet tracker GL100 and G
Hello, I am trying to learn the major causes of desense on gsm/wcdma/wifi/GPS systems. What are the major sources of desense on a phone packed with all these standards, how to mitigate the desense? -USB cable can affect 2G/3G RX channels -wcdma TX can affect wcdma RX channels -2G/3G can affect GPS signals - etc (...)
Because different system have different modulation, gsm uses GMSK, mainly for voice. And EDGE modulation is more complicated. So the peak-average-ratio of the systems are different. If EDGE peka power is 70W, the average power should be 45W. And you can estimate the wcdma power maybe can't reach 45W. What is power value? There are some specificati
THS! Hi,Shehata. I know the one,leave the device, it is no use no matter how good the antenna performance. So, I want to know good or bad performance of cellphones(gsm or wcdma ) ——wireless standards use darkroom or other equipment.
From my knowledge only cellular systems as (gsm, wcdma, WiMAX, CDMA, etc.) and Bluetooth, have RF specifications for blocking. But this doesn't means that other RF systems will work fine with any blocker present at the input. See the attachment for Bluetooth blocking requirements, and you can implement somehow for Zigbee. The blocking signal is CW
Hello everybody, I am looking for some advanced tutorials /books on this subject , there is a lot of material on in-building optimization and design of gsm/wcdma systems. hav'nt found yet on LTE Is there a big diferrence ? any help would be appreciated .
Dear Users, I am looking for any kind of help regarding any VHDL programming of gsm CDMA wcdma LTE HSPA WiMAX. I am working on a project where we have to develop a chip which will work in all protocols. Many Thanks
Hi, Does 3G standard specifies low power modes in broadband modules? For example, some manufacturers like Option GTM661 specifies two low power modes: 1.Sleep 1mA max (USB off) 2.Standby 1.5mA max (gsm DRX=5, wcdma SCI=2) Does power consumption depends only on modem manufacturers or standard specifies it? - tantudaisu -
The main difference is: 1. Data rate 2. Modulation scheme used 3. Bandwidth You can get some information from these sites: 3gLteInfo: UMTS tutorials, LTE tutorials, HSDPA tutorials, HSUPA tutorials, HSPA+ tutorials, wcdma tutorials, 3G tutorials, gsm tutorials, GPRS tutorials 3G and 4G
Hi everybody! I use Matlab Simulink to simulate the co-existence between gsm and wcdma. I have wcdma and gsm model (Tx and Rx ), however I don't know how to transmit both in a channel.I try to transmit them in AWGN channel but it has just 1 input... What should i do now?
hi anyone help me out to learn about wcdma channels concept... i studied gsm channels from various resource in net. i understand clearly.. but i am not having clear understanding of UMTS channles.. need a good document ,resource to understand clearly .
The bandwidth for UMTS is 5 MHz but i was just wondering if the carrier is always spaced @ centre of 5MHz block? & what is the importance of channel raster in UMTS (& gsm)