Stack Overflow
Stack Overflow

Questions tagged [cdma]

Code division multiple access (CDMA): the channel access method. Also common name for mobile phone standards cdmaOne, CDMA2000...

More info:

  1. http://www.pcmag.com/encyclopedia_term/0,1237,t=CDMA&i=39462,00.asp
  2. http://cellphones.about.com/od/phoneglossary/g/cdma.htm

CDMA, or Code Division Multiple Access, is a competing cell phone service technology to GSM, which is the world’s most widely used cell phone standard.

75 questions
2
votes
1 answer

Soft hand off in CDMA cellular networks

Hi, In the CDMA cellular networks when MS (Mobile Station) need to change a BS(Base Station), exactly necessary for hand-off, i know that is soft hand-off (make a connection with a target BS before leaving current BS-s). But i want to know,…
user176420
  • 41
  • 4
2
votes
1 answer

CDMA PDU parsing on Android

I have written a program to decode a CDMA 3GPP2 point-to-point SMS message. I tested it on a couple CDMA PDU hex strings I found on the internet, and it works perfectly. However, when I try to implement it on all incoming text messages on the…
user1478841
  • 23
  • 1
  • 5
2
votes
2 answers

Does CDMA support concatenation (long) SMS

Does CDMA support concatenated SMS? If it is does which version of CDMA added support for it? Which networks in the USA that use CDMA support concatenated SMS? Thanks!
turf00
  • 31
  • 2
1
vote
1 answer

Get type of device, means CDMA or GSM

I am making an app in which I have to get device type. Which means is the device GSM or CDMA? And how do I get the manufacturer of the phone? Can anyone help me how to do this?
user1025050
1
vote
3 answers

Why getBaseStationLatitude() keeps returning the Integer.MAX_VALUE (unknown)?

Class project & thesis work - trying to pull information from CDMA Cell, specifically by using the getBaseStationLatitude() & getBaseStationLongitude(). The value being returned is the MAX_VALUE (2147483647) - I'm not receiving actual lat/longs. …
bdzl10
  • 11
  • 1
  • 2
1
vote
0 answers

EVRC NW codec not decode audio from raw file

I am working on EVRCNW codec to integrate with our existing product, for that purpose i have downloaded the Enhanced Variable Rate Codec ([http://www.3gpp2.org/Public_html/Specs/C.R0014-D_v1.0_EVRC-D_SoftwareDistribution_100125.zip]) ‘C.R0014-D…
Anil Jaiswal
  • 11
  • 1
  • 3
1
vote
0 answers

Code Division Multiple Access

In CDMA,we usually obtain the result by the rules, c1 * c2 = 0; c1 * c1 = 4. Can not we use the other constant no.? What is the significance of c1 * c1 = 4 ?
Raj Chauhan
  • 15
  • 1
  • 8
1
vote
0 answers

How to get RSCP, SINR and EcNo values in Android

I need to find RSCP, SINR and EcNo. So far i am able to calculate RSRP and RSRQ values from android.telephony.SignalStrength. My questions are: When I try to get SignalStrength#getTdScdmaDbm() via reflection it returns Integer.MAX_VALUE (if i debug…
Haris Qurashi
  • 2,104
  • 1
  • 13
  • 28
1
vote
0 answers

Android SignalStrength.isGsm

On my Android app, I have a phone state listener that is checking for gsm: m_phoneStateListener = new PhoneStateListener() { public void onSignalStrengthsChanged(SignalStrength signalStrength) { // check if it's GSM …
Kevin
  • 109
  • 12
1
vote
3 answers

CellID location with CDMA

Is there a way to determine location via CellID on a CDMA network? I can get a network ID, base station ID, and system ID programatically, but is there an api somewhere to convert these to lat, long coordinates? The…
Brian
  • 21
  • 1
  • 3
1
vote
0 answers

How to include path loss into the Rayleigh channel?

I understood that the received signal equation denoted y=hx+n. I have a script of transmission from sender to receiver in MCCDMA Rayleigh and AWGN channel. Looking up from some forum, I have found that distance and path loss exponent could be…
Ms Nas
  • 21
  • 2
1
vote
1 answer

The value of TelephonyManager.getPhoneType is related to phone and a fixed constant or related to sim card?

The value of TelephonyManager.getPhoneType is related to phone and is fixed or related to sim card? The return value is a fixed constant no matter what the type of sim is ? Thanks
Victor Choy
  • 4,006
  • 28
  • 35
1
vote
0 answers

Usage of comm.GoldSequence System object in Matlab for hundreds of users leads to degraded performance

I am trying to model CDMA in Matlab for a few hundred users to compare it with other multiple access schemes. Every time the script runs, first a data frame is created with this line: User = sign(randn([NumberOfUsers,BitsPerFrame])); And then I am…
GeMar
  • 11
  • 1
1
vote
1 answer

How to establish ppp communication between TI AM335x Linux board and Telit DE910 module

I'm working with TI MA335x board running Linux in it and want to interface Telit DE910 Dual CDMA module to this board and establish ppp communication between these two to receive data from the network. I have littile knowledge about AT commands and…
Srikanth
  • 131
  • 8
1
vote
1 answer

Android: Force on Data Network if Wifi is on.Works on GSM fails CDMA Devices

On GSM devices able to force on data network if wifi is on ,But on CDMA devcies it fails. public boolean isMobileHighPriorityUP() { ConnectivityManager connMgr = (ConnectivityManager) mCxt.getSystemService(Context.CONNECTIVITY_SERVICE); …
NitZRobotKoder
  • 1,046
  • 8
  • 44
  • 74
1 2
3
4 5