9 Transmission and reception

05.013GPPGeneral descriptionPhysical layer on the radio pathTS

The modulated stream is then transmitted on a radio frequency carrier. The frequency bands and channel arrangements are the following:

i) GSM 450 Band;

For GSM 450, the system is required to operate in the following frequency band:

450.4 – 457.6 MHz: mobile transmit, base receive;

460.4 – 467.6 MHz: base transmit, mobile receive;

ii) GSM 480 Band;

For GSM 480, the system is required to operate in the following frequency band:

478.8 – 486 MHz: mobile transmit, base receive;

488.8 – 496 MHz: base transmit, mobile receive;

iii) GSM 850 Band;

For 850, the system is required to operate in the following band:

824 – 849 MHz: mobile transmit, base receive

869 – 894 MHz: base transmit, mobile receive

iv) Standard or primary GSM 900 Band, P‑GSM;

For Standard GSM 900 Band, the system is required to operate in the following frequency band:

890 ‑ 915 MHz: mobile transmit, base receive

935 ‑ 960 MHz: base transmit, mobile receive

v) Extended GSM 900 Band, E‑GSM (includes Standard GSM 900 band);

For Extended GSM 900 Band, the system is required to operate in the following frequency band:

880 ‑ 915 MHz: mobile transmit, base receive

925 ‑ 960 MHz: base transmit, mobile receive

vi) Railways GSM 900 Band, R‑GSM (includes Standard and Extended GSM 900 Band);

For Railways GSM 900 Band, the system is required to operate in the following frequency band:

876 ‑ 915 MHz: mobile transmit, base receive

921 ‑ 960 MHz: base transmit, mobile receive

vii) DCS 1 800 Band;

For DCS 1 800, the system is required to operate in the following frequency band:

1 710 ‑ 1 785 MHz: mobile transmit, base receive

1 805 ‑ 1 880 MHz: base transmit, mobile receive

viii) PCS 1900 Band;

For PCS 1900, the system is required to operate in the following frequency band;

1850-1910 MHz: mobile transmit, base receive

1930-1990 MHz: base transmit, mobile receive

NOTE 1: The term GSM 400 is used for any GSM system, which operates in any 400 MHz band.

NOTE 2: The term GSM 900 is used for any GSM system, which operates in any 900 MHz band.

NOTE 3: The BTS may cover a complete band, or the BTS capabilities may be restricted to a subset only, depending on the operator needs.

Operators may implement networks on a combination of the frequency bands above to support multi band mobile stations, which are defined in 3GPP TS 02.06.

The RF channel spacing is 200 kHz, allowing for 35 (GSM 450), 35 (GSM 480), 124 (GSM 850), 194 (GSM 900), 374 (DCS 1 800) and 299 (PCS 1900) radio frequency channels, thus leaving a guard band of 200 kHz at each end of the sub-bands.

The specific RF channels, together with the requirements on the transmitter and the receiver will be found in 3GPP TS 05.05 (Transmission and reception) and in 3GPP TS 05.56 for the CTS-FP.

In order to allow for low power consumption for different categories of mobiles (e.g. vehicle mounted, hand‑held, ..), different power classes have been defined. For GSM 400, GSM 850 (MXM 850 MS as defined in 3GPP TS 05.05) and GSM 900 there are four power classes with the maximum power class having 8 W peak output power (ca 1 W mean output power) and the minimum having 0,8 W peak output power. For DCS 1 800 there are three power classes of 4 W peak output power, 1 W peak output power (ca 0,125 W mean) and 0,25 W peak output power. For PCS 1900 there are three power classes of 2 watts, 1 watt and .25 watt peak output power.

Multi band mobile stations may have any combinations of the allowed power classes for each of the bands supported.

The power classes are specified in 3GPP TS 05.05 and in 3GPP TS 05.56 for CTS-FP.

The requirements on the overall transmission quality together with the measurement conditions are also in 3GPP TS 05.05 and in 3GPP TS 05.56 for CTS-FP.