5 Receiver characteristics
05.053GPPRadio transmission and receptionTS
In this clause, the requirements are given in terms of power levels at the antenna connector of the receiver. Equipment with integral antenna may be taken into account by converting these power level requirements into field strength requirements, assuming a 0 dBi gain antenna. This means that the tests on equipment on integral antenna will consider fields strengths (E) related to the power levels (P) specified, by the following formula (derived from the formula E = P + 20logF(MHz) + 77,2):
assuming F = 460 MHz : E (dBµV/m) = P (dBm) + 130,5 for GSM 400;
assuming F = 859 MHz : E (dBµV/m) = P (dBm) + 135,9 for GSM 850;
assuming F = 925 MHz : E (dBµV/m) = P (dBm) + 136,5 for GSM 900;
assuming F = 1 795 MHz : E (dBµV/m) = P (dBm) + 142,3 for DCS 1 800;
assuming F = 1 920 MHz : E (dBuV/m) = P (dBm) + 142,9 for PCS 1 900.
Static propagation conditions are assumed in all cases, for both wanted and unwanted signals. For subclauses 5.1 and 5.2, values given in dBm are indicative, and calculated assuming a 50 ohms impedance.
5.1 Blocking characteristics
The blocking characteristics of the receiver are specified separately for in‑band and out‑of‑band performance as identified in the following tables.
Frequency | Frequency range (MHz) | |||
band | GSM 900 | E‑GSM 900 | R-GSM 900 | |
MS | BTS | BTS | BTS | |
in‑band | 915 ‑ 980 | 870 ‑ 925 | 860 ‑ 925 | 856 – 921 |
out‑of‑band (a) | 0,1 ‑ < 915 | 0,1 ‑ < 870 | 0,1 ‑ < 860 | 0,1 ‑ < 856 |
out‑of‑band (b) | N/A | N/A | N/A | N/A |
out‑of band (c) | N/A | N/A | N/A | N/A |
out‑of band (d) | > 980 ‑ 12,750 | > 925 ‑ 12,750 | > 925 ‑ 12,750 | > 921 ‑ 12,750 |
Frequency | Frequency range (MHz) | |
band | DCS 1 800 | |
MS | BTS | |
in‑band | 1 785 ‑ 1 920 | 1 690 ‑ 1 805 |
out‑of‑band (a) | 0,1 ‑ 1705 | 0,1 ‑ < 1 690 |
out‑of‑band (b) | > 1 705 ‑ < 1 785 | N/A |
out‑of band (c) | > 1 920 ‑ 1 980 | N/A |
out‑of band (d) | > 1 980 ‑ 12,750 | > 1 805 ‑ 12,750 |
Frequency | Frequency range (MHz) | |
band | ||
PCS 1 900 MS | PCS 1 900 & MXM 1900 BTS | |
in‑band | 1910 ‑ 2010 | 1830 – 1930 |
out‑of‑band (a) | 0,1 ‑ < 1830 | 0,1 ‑ < 1830 |
out‑of‑band (b) | 1830 ‑ < 1910 | N/A |
out‑of band (c) | > 2010 ‑ 2070 | N/A |
out‑of band (d) | > 2070 ‑ 12,750 | > 1930 – 12,750 |
Frequency | Frequency range (MHz) | |
band | ||
GSM 850 MS | GSM 850 & MXM 850 BTS | |
in‑band | 849 ‑ 914 | 804 – 859 |
out‑of‑band (a) | 0,1 ‑ < 849 | 0,1 ‑ < 804 |
out‑of‑band (b) | N/A | N/A |
out‑of band (c) | N/A | N/A |
out‑of band (d) | > 914‑ 12,750 | > 859 – 12,750 |
Frequency | Frequency range (MHz) | |||
band | GSM 450 | GSM 480 | ||
MS | BTS | MS | BTS | |
in‑band | 457,6 – 473,6 | 444,4 – 460,4 | 486,0 – 502,0 | 472,8 – 488,8 |
out‑of‑band (a) | 0,1 ‑ < 457,6 | 0,1 ‑ < 444,4 | 0,1 ‑ < 486,0 | 0,1 ‑ < 472,8 |
out‑of‑band (b) | N/A | N/A | N/A | N/A |
out‑of band (c) | N/A | N/A | N/A | N/A |
out‑of band (d) | > 473,6 ‑ 12,750 | > 460,4 ‑ 12,750 | > 502,0 ‑ 12,750 | > 488,8 ‑ 12,750 |
The reference sensitivity performance as specified in tables 1, 1a, 1b, 1c, 1d and 1e shall be met when the following signals are simultaneously input to the receiver:
‑ for all cases except GSM 850 normal BTS, MXM 850 normal BTS and MXM 1900 normal BTS, a useful signal, modulated with the relevant supported modulation (GMSK or 8-PSK), at frequency fo, 3 dB above the reference sensitivity level or input level for reference performance, whichever applicable, as specified in subclause 6.2;
- for GSM 850 normal BTS, MXM 850 normal BTS and MXM 1900 normal BTS a useful signal, modulated with the relevant supported modulation (GMSK or 8-PSK), at frequency fo, 1 dB above the reference sensitivity level or input level for reference performance, whichever applicable, as specified in subclause 6.2;
‑ a continuous, static sine wave signal at a level as in the table below and at a frequency (f) which is an integer multiple of 200 kHz. For GSM 850 normal BTS, MXM 850 normal BTS and MXM 1900 normal BTS at inband frequency offsets 3 000 kHz this signal is GMSK modulated by any 148‑bit sequence of the 511‑bit pseudo random bit sequence, defined in CCITT Recommendation O.153 fascicle IV.4,
with the following exceptions, called spurious response frequencies:
a) GSM 900 MS and BTS, GSM 850 MS and BTS, and MXM 850 BTS: in band, for a maximum of six occurrences (which if grouped shall not exceed three contiguous occurrences per group);
DCS 1 800, PCS 1 900 MS and BTS and MXM 1900 BTS: in band, for a maximum of twelve occurrences (which if grouped shall not exceed three contiguous occurrences per group);
GSM 400 MS and BTS: in band, for a maximum of three occurrences;
b) out of band, for a maximum of 24 occurrences (which if below f0 and grouped shall not exceed three contiguous occurrences per group).
where the above performance shall be met when the continuous sine wave signal (f) is set to a level of 70 dBµV (emf) (i.e. ‑43 dBm).
NOTE: For testing reasons, a MXM 1900 normal BTS fulfilling the PCS 1900 normal BTS requirements in this paragraph may be considered fulfilling the requirements for MXM 1900 normal BTS.
Frequency | GSM 400, P-, E- and R-GSM 900 | DCS 1 800 & PCS 1 900 | ||||||||
band | other MS | small MS | BTS | MS | BTS | |||||
dBµV | dBm | dBµV | dBm | dBµV | dBm | dBµV | dBm | dBµV | dBm | |
(emf) | (emf) | (emf) | (emf) | (emf) | ||||||
in‑band | ||||||||||
600 kHz |f‑fo | < 800 kHz | 75 | ‑38 | 70 | ‑43 | 87 | ‑26 | 70 | ‑43 | 78 | ‑35 |
800 kHz |f‑fo | < 1,6 MHz | 80 | ‑33 | 70 | ‑43 | 97 | ‑16 | 70 | ‑43 | 88 | ‑25 |
1,6 MHz |f‑fo | < 3 MHz | 90 | ‑23 | 80 | ‑33 | 97 | ‑16 | 80 | ‑33 | 88 | ‑25 |
3 MHz |f‑fo | | 90 | ‑23 | 90 | ‑23 | 100 | ‑13 | 87 | ‑26 | 88 | ‑25 |
out‑of‑band | ||||||||||
(a) | 113 | 0 | 113 | 0 | 121 | 8 | 113 | 0 | 113 | 0 |
(b) | ‑ | ‑ | ‑ | ‑ | ‑ | ‑ | 101 | ‑12 | ‑ | ‑ |
(c) | ‑ | ‑ | ‑ | ‑ | ‑ | ‑ | 101 | ‑12 | ‑ | ‑ |
(d) | 113 | 0 | 113 | 0 | 121 | 8 | 113 | 0 | 113 | 0 |
NOTE: For definition of small MS, see subclause 1.1. | ||||||||||
The following exceptions to the level of the sine wave signal (f) in the above table shall apply:
for E-GSM MS, in the band 905 MHz to 915 MHz | ‑5 dBm |
for R-GSM 900 MS, in the band 880 MHz to 915 MHz | ‑5 dBm |
for R-GSM 900 small MS, in the band 876 MHz to 915 MHz | ‑7 dBm |
for GSM 450 small MS, in the band 450,4 MHz to 457,6 MHz | ‑5 dBm |
for GSM 480 small MS, in the band 478,8 MHz to 486 MHz | ‑5 dBm |
for GSM 900 and E-GSM 900 BTS, in the band 925 MHz to 935 MHz | 0 dBm |
for R-GSM 900 BTS at offsets 600 kHz <= abs (f-f0) < 3 MHz, in the band 876 MHz to 880 MHz | Level reduced by 5 dB |
Frequency | GSM 850 MS | GSM 850 & MXM 850 BTS | MXM 1900 BTS | |||
band | dBµV | dBm | dBµV | dBm | dBµV | dBm |
(emf) | (emf) | (emf) | ||||
in‑band | ||||||
600 kHz |f‑fo | < 800 kHz | 70 | ‑43 | 76 | ‑37 | 70 | ‑43 |
800 kHz |f‑fo | < 1,6 MHz | 70 | ‑43 | 78 | ‑35 | 75 | ‑38 |
1,6 MHz |f‑fo | < 3 MHz | 80 | ‑33 | 80 | ‑33 | 80 | ‑33 |
3 MHz |f‑fo | | 90 | ‑23 | 80 | ‑33 | 80 | ‑33 |
out‑of‑band | ||||||
(a) | 113 | 0 | 121 | 8 | 113 | 0 |
(b) | ‑ | ‑ | ‑ | ‑ | ‑ | ‑ |
(c) | ‑ | ‑ | ‑ | ‑ | ‑ | ‑ |
(d) | 113 | 0 | 121 | 8 | 113 | 0 |
The blocking characteristics of the micro‑BTS receiver are specified for in‑band and out‑of‑band performance. The out‑of‑band blocking remains the same as a normal BTS and the in-band blocking performance shall be no worse than in the table below.
Frequency band | GSM 900, GSM 850 and MXM 850 micro and pico‑BTS | DCS 1 800, PCS 1900 and MXM 1900 micro and pico‑BTS | ||||||
M1 | M2 | M3 | P1 | M1 | M2 | M3 | P1 | |
(dBm) | (dBm) | (dBm) | (dBm) | (dBm) | (dBm) | (dBm) | (dBm) | |
in‑band | ||||||||
600 kHz |f‑f0| < 800 kHz | ‑31 | ‑26 | ‑21 | ‑34 | ‑40 | ‑35 | ‑30 | -41 |
800 kHz |f‑f0| < 1,6 MHz | ‑21 | ‑16 | ‑11 | ‑34 | ‑30 | ‑25 | ‑20 | -41 |
1,6 MHz |f‑f0| < 3 MHz | ‑21 | ‑16 | ‑11 | ‑26 | ‑30 | ‑25 | ‑20 | -31 |
3 MHz |f‑f0| | ‑21 | ‑16 | ‑11 | ‑18 | ‑30 | ‑25 | ‑20 | -23 |
The blocking performance for the pico-BTS attempts, for the scenario of a close proximity uncoordinated MS, to balance the impact due to blocking by the MS with that due to wideband noise overlapping the wanted signal.
5.2 AM suppression characteristics
The reference sensitivity performance as specified in tables 1, 1a, 1b, 1c, 1d and 1e shall be met when the following signals are simultaneously input to the receiver.
– A useful signal, modulated with the relevant supported modulation (GMSK or 8-PSK), at frequency fo, 3 dB above the reference sensitivity level or input level for reference performance, whichever applicable, as specified in subclause 6.2.
‑ A single frequency (f), in the relevant receive band, | f‑fo | > 6 MHz, which is an integer multiple of 200 kHz, a GSM TDMA signal modulated in GMSK and by any 148‑bit sequence of the 511‑bit pseudo random bit sequence, defined in CCITT Recommendation O.153 fascicle IV.4, at a level as defined in the table below. The interferer shall have one timeslot active and the frequency shall be at least 2 channels separated from any identified spurious response. The transmitted bursts shall be synchronized to but delayed in time between 61 and 86 bit periods relative to the bursts of the wanted signal.
NOTE: When testing this requirement, a notch filter may be necessary to ensure that the co‑channel performance of the receiver is not compromised.
Micro and pico‑BTS | ||||||
MS | BTS | M1 | M2 | M3 | P1 | |
(dBm) | (dBm) | (dBm) | (dBm) | (dBm) | (dBm) | |
GSM 400 | -31 | -31 | ** | ** | ** | ** |
GSM 900 | -31 | -31 | -34 | -29 | -24 | -21 |
GSM 850 | -31 | -31 | -34 | -29 | -24 | -21 |
MXM 850 | – | -33 | -34 | -29 | -24 | -21 |
DCS 1 800 | -29 / -31* | -35 | -33 | -28 | -23 | -26 |
PCS 1 900 | -31 | -35 | -33 | -28 | -23 | -26 |
MXM 1900 | – | -35 | -33 | -28 | -23 | -26 |
NOTE 1: * The ‑31 dBm level shall only apply to DCS 1800 class 1 and class 2 MS meeting the ‑102 dBm reference sensitivity level requirement according to subclause 6.2. NOTE 2: ** These BTS types are not defined. | ||||||
5.3 Intermodulation characteristics
The reference sensitivity performance as specified in tables 1, 1a, 1b, 1c, 1d and 1e shall be met when the following signals are simultaneously input to the receiver:
‑ a useful signal at frequency fo, 3 dB above the reference sensitivity level or input level for reference performance, whichever applicable, as specified in subclause 6.2;
‑ a continuous, static sine wave signal at frequency f1 and a level of 70 dBµV (emf) (i.e. ‑43 dBm):
‑ for GSM 400 small MSs and GSM 900 small MSs and GSM 850 small MSs, DCS 1 800 and PCS 1 900 MS and DCS 1 800, PCS 1 900 and MXM 1900 BTS this value is relaxed to 64 dBµV (emf) (i.e. ‑49 dBm);
‑ for the DCS 1 800 class 3 MS this value is relaxed to 68 dBµV (emf) (i.e. ‑45 dBm);
‑ any 148‑bits subsequence of the 511‑bits pseudo‑random sequence, defined in CCITT Recommendation O.153 fascicle IV.4 GMSK modulating a signal at frequency f2, and a level of 70 dBµV (emf) (i.e. ‑43 dBm):
‑ for GSM 400 small MSs and GSM 900 small MSs and GSM 850 small MSs, DCS 1 800 and PCS 1 900 MS and DCS 1 800, PCS 1 900 and MXM 1900 BTS this value is relaxed to 64 dBµV (emf) (i.e. ‑49 dBm);
‑ for the DCS 1 800 class 3 MS this value is relaxed to 68 dBµV (emf) (i.e. ‑45 dBm);
such that f0 = 2f1 ‑ f2 and |f2‑f1 | = 800 kHz.
NOTE: For subclauses 5.2 and 5.3 instead of any 148‑bits subsequence of the 511‑bits pseudo‑random sequence, defined in CCITT Recommendation O.153 fascicle IV.4, it is also allowed to use a more random pseudo‑random sequence.
5.4 Spurious emissions
The spurious emissions for a BTS receiver, measured in the conditions specified in subclause 4.3.1, shall be no more than:
‑ 2 nW (‑57 dBm) in the frequency band 9 kHz to 1 GHz;
‑ 20 nW (‑47 dBm) in the frequency band 1 GHz to 12.75 GHz.
NOTE: For radiated spurious emissions for the BTS, the specifications currently only apply to the frequency band 30 MHz to 4 GHz. The specification and method of measurement outside this band are under consideration.