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EcNo,RSCP,RSSI,CPICH

  • This topic has 62 replies, 1 voice, and was last updated 9 years ago by hela.
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  • 13th March 2006 at 15:17 #44507
    Tag
    Guest

    Hi anyone can explain the relationship of

    EcNo,RSCP,RSSI,CPICH

    Thanks in advance.

    Tag

    16th March 2006 at 13:32 #44508
    areeba
    Guest

    EcNo :energy per chip over noise destiny.
    RSCP: carrier power
    RSSI : signal strength.
    CPICH : common pilot channel.
    You determine wheather your pilot ch is polluted or attenuated by measuring on it (EcNo,RSCP,RSSI).

    22nd March 2006 at 11:51 #44509
    jood
    Guest

    They are measurement parameter in 3G WCDMA drive test.
    RSSI: recieved signal strength indicator.
    CPICH-Ec/No: recieved energy per chip devided by the power density in the band.
    CPICH-RSCP: recieved signal code power.
    CPICH: common pilot channel.
    So you have to measure two parameter on pilot ch (Ec/No & RSCP)to verify P-CPICH detection to minimise coverage holes,
    Ex (RSCP >-100dBm (sufficient) & Ec/No > -14 (suuficient))
    & by correlation between low Ec/No & high RSCP you can find the interference & pilot pollution.

    16th August 2007 at 06:41 #44510
    koush
    Guest

    Dear All
    how we could optimiza pilot pollution, is it just by decreasing power at interfered node.B >> what if our coverage is affected.
    plz clarify more solutions.

    29th September 2007 at 09:27 #44511
    Gito Prastomo
    Guest

    Dear Koush,
    Pilot Pollution, could be improve through some methode. The Drivetest report audit must be performed first.
    Through that report we could know which site has overshoot coverage, this site could be downtilt. But if it couldnt (the tilt is already too down) then you could reduce the CPICH power.
    This could impact on the coverage, so you must discuss with your customer about this, does he want big coverage but bad on quality or low coverage but good quality…

    21st August 2009 at 21:45 #44512
    RNP2
    Guest

    what is the difference between RSSI and RSCP ? Can any please describe with an example?
    thanks.

    26th October 2009 at 16:50 #44513
    Binh
    Guest

    Hi anyone can explain the relationship of

    EcNo,RSCP,RSSI,CPICH

    thanks

    27th March 2010 at 06:29 #44514
    3G WCDMA DT Engr.
    Guest

    Dear All,

    What is the formula in calculating
    EC/IO and RSCP

    Thanks

    31st March 2010 at 14:35 #44515
    blert
    Guest

    Dear All,

    What is the formula in calculating
    EC/IO and RSCP

    Thanks

    Wow, thats quite a question if you really need the formula – which I cant see you needing a reason for. The formulas for both are probably contained in the propogation tool used by your company, and measurements carried out in the handset and BTS.

    All you really need to know about the levels for both are what is acceptable and what is not for various areas/types.

    Its generally accepted that EC/IO is good enopugh around the 14dBm level, and a decent signal level (RSCP)is up to -100 (again, these are dependent on clutter types).

    The lower the level of RSCP then the more chance there is of degradation in the signal, and the more chance of noise being introduced as external sites shooting into the area have a greater effect on the S?N ratio.

    Hope this helps

    10th June 2010 at 10:32 #44516
    DT Azhar 3G
    Guest

    what is the Basic deination of commom pilot control Channal,

    CPICH.

    1st July 2010 at 15:50 #44517
    BB
    Guest

    RSCP = RSSI + EcNo

    4th July 2010 at 08:45 #44518
    naresh
    Guest

    Hi,

    in 3g drive test main which parameter should be observed and which are their standard values or ranges?

    plz tell i am new to 3g/…..

    18th July 2010 at 19:12 #44519
    Sunny Kaushik
    Guest

    Hi all,
    I am an RF Engineer n trying to learn 3G architecture n its parameters on my own through self study.
    Can anyone help me out on scrambling code planning and CPICH details…n if possible anything that may help me in 3G Optimization….looking forward for ur replys……..

    19th July 2010 at 17:23 #44520
    Damien
    Guest

    EcNo: energy per chip over the noise, a measure of the quality of the signal
    RSCP: Energy after processing ie with gain from coding etc
    RSSI: A dB measure of the signal arriving at the antenna before gain from processing
    CPICH: Pilot Channel of the cell.

    28th July 2010 at 20:01 #44521
    Ashutosh Chauhan
    Guest

    What is the difference b/w RSSI and RSCP.
    What is estimated SIR?

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