13 Adjacent Channel Rejection Ratio (ACRR)

25.1163GPPRelease 17TSUTRA repeater radio transmission and reception (LCR TDD)

13.1 Definitions and applicability

Adjacent Channel Rejection Ratio (ACRR) is the ratio of the RRC weighted gain per carrier of the repeater in the pass band to the RRC weighted gain of the repeater on an adjacent channel. The carrier in the pass band and in the adjacent channel shall be of the same type (reference carrier).

The requirement shall apply to the uplink and downlink of Repeater, at maximum gain, where the donor link is maintained via antennas (over the air Repeater).

13.2 Co-existence with UTRA

This requirement shall be applied for the protection of UTRA signals in geographic areas in which LCR TDD Repeater and UTRA BS are deployed so that they serve adjacent channels. The reference carrier is a UTRA-FDD carrier.

13.2.1. Minimum Requirements

In normal conditions the ACRR shall be higher than the value specified in the Table 13.2.1-1.

Table 13.2.1-1: Repeater ACRR

Co-existence with other systems	Repeater maximum output Pmax	Channel offset from the channel edge from the first or last 5MHz channel within the pass band.	ACRR limit
UTRA	P  31 dBm	2,5 MHz	33dB
	P  31 dBm	5,0 MHz	33dB
	P < 31 dBm	2,5 MHz	20dB
	P < 31 dBm	5,0 MHz	20dB

Note: For co-existence with TDD, a narrow band requirement is for further study.