6.7 Transmit intermodulation

25.1023GPPRelease 17TSUser Equipment (UE) radio transmission and reception (TDD)

The transmit intermodulation performance is a measure of the capability of the transmitter to inhibit the generation of signals in its non linear elements caused by presence of the wanted signal and an interfering signal reaching the transmitter via the antenna.

6.7.1 Minimum requirement

User Equipment(s) transmitting in close vicinity of each other can produce intermodulation products, which can fall into the UE, or BS receive band as an unwanted interfering signal. The UE intermodulation attenuation is defined by the ratio of the RRC filtered mean power of the wanted signal to the RRC filtered mean power of the intermodulation product when an interfering CW signal is added at a level below the wanted signal.

6.7.1.1 3.84 Mcps TDD Option

The requirement of transmitting intermodulation for carrier spacing 5 MHz is prescribed in Table 6.8.

Table 6.8: Transmit Intermodulation (3.84 Mcps TDD Option)

Interference Signal Frequency Offset	5MHz	10MHz
Interference Signal Level	-40 dBc
Minimum Requirement	-31dBc	-41dBc

6.7.1.2 1.28 Mcps TDD Option

The requirement of transmitting intermodulation for carrier spacing 1.6 MHz is prescribed in Table 6.8A.

Table 6.8A: Transmit Intermodulation (1.28 Mcps TDD Option)

Interference signal frequency offset	1.6MHz	3.2MHz
Interference signal level	-40dBc
Minimum requirement of intermodulation products	-31 dBc	-41 dBc

6.7.1.3 7.68 Mcps TDD Option

The requirement of transmitting intermodulation for carrier spacing 10 MHz is prescribed in Table 6.8B.

Table 6.8B: Transmit Intermodulation (7.68 Mcps TDD Option)

Interference Signal Frequency Offset	10MHz	20MHz
Interference Signal Level	-40 dBc
Minimum Requirement	-31dBc	-41dBc

6.7.2 Additional requirement for 1.28Mcps TDD MC-HSUPA

The UE intermodulation attenuation is defined by the ratio of the sum of the RRC filtered mean powers of the wanted signal on the assigned N carriers to the sum of the RRC filtered mean powers of the intermodulation product on adjacent N carriers when an interfering CW signal is added at a level below the wanted signal. N is the number of carriers for multi-carrier transmission.

Table 6.8C: Transmit Intermodulation requirement for 1.28Mcps TDD MC-HSUPA

Transmission Carrier Number (UL)	2		3		6
Interference Signal Frequency Offset	3.2MHz	6.4MHz	4.8MHz	9.6MHz	9.6MHz	19.2MHz
Interference Signal Level	-40dBc
Intermodulation Product	-31dBc	-41dBc	-31dBc	-41dBc	-31dBc	-41dBc