Xiaomi mi 11 pro & ultra with tri-band A-GPS, GLONASS, BDS, GALILEO, QZSS, NavIC

[behrooz kiani]

https://m.gsmarena.com/xiaomi_mi_11_pro-10816.php 

[Sean Barbeau]

I'm interested in what the 3rd band is here. If anyone has access to the Mi 11 Pro please do "Share->Device info" to contribute it to the GPSTest Database!

Sean

On Tue, Mar 30, 2021, 1:38 PM behrooz kiani <behroo...@gmail.com> wrote:

https://m.gsmarena.com/xiaomi_mi_11_pro-10816.php 

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[Knut]

I checked a few spec reports via Google on the MI 11 Pro and some sites report dual, others triple frequencies for Navigation.

One site reported the following list of supported signals for the MI 11 Pro:

GPS, A-GPS, GLONASS, Beidou, QZSS, Galileo, GPS (L1+L5), GLONASS (L1), BeiDou (B1), Galileo (E1+E5a), BeiDou (B2), NavIC System

[www.kimovil.com/en/where-to-buy-xiaomi-mi-11-pro]

Which might explain the different reporting, because B2 sounds very different but is identical to E5a (1176.45 MHz), from all I know.

Cheers,

Knut

[Sean Barbeau]

>Which might explain the different reporting, because B2 sounds very different but is identical to E5a (1176.45 MHz), from all I know.

BeiDou B2a is the same carrier frequency as L5/E5a (1176.45 MHz), but B2 (also listed as B2I) is 1207.14 MHz. I'm guessing that the device actually supports B2a, as that wouldn't require another RF front end and antenna as I understand it. And technically then it wouldn't be tri-band, just dual-band for 3 GNSS (GPS, Galileo, and BeiDou).

Here's what the code looks like to label BeiDou CFs with all the values:

public static String getBeidoucCf(float carrierFrequencyMhz) {
    if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1561.098f, CF_TOLERANCE_MHZ)) {
        return "B1";
    } else if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1589.742f, CF_TOLERANCE_MHZ)) {
        return "B1-2";
    } else if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1575.42f, CF_TOLERANCE_MHZ)) {
        return "B1C";
    } else if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1207.14f, CF_TOLERANCE_MHZ)) {
        return "B2";
    } else if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1176.45f, CF_TOLERANCE_MHZ)) {
        return "B2a";
    } else if (MathUtils.fuzzyEquals(carrierFrequencyMhz, 1268.52f, CF_TOLERANCE_MHZ)) {
        return "B3";
    } else {
        return CF_UNKNOWN;
    }
}

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[Lodro Gyamtso]

according to this picture
https://gssc.esa.int/navipedia/images/c/cf/GNSS_All_Signals.png
from this link
https://gssc.esa.int/navipedia/index.php/GNSS_signal
every band has a number. No matter the letter after this number, the frequency belongs to the same band category.

So, there are no 3 band android smartphones for now !!!!!