Huawei SASU&SASA Solution Huawei supports G/U co-site methods by using external device such as SASU and SASA. SASU for G/U sharing feeder & antenna SASU is recommended in the application of GSM transmit carrier outputting through one antenna port. It has the following features:
SASU works for the full 900MHz band, and there is no need to replace it in case frequency retuning of both GSM900 & UMTS900.
Little impact on uplink noise figure, and in downlink, maximally, about 0.6dB insertion loss is introduced.
2014-4-11
In the downlink, SASU provides one TX path for GSM and UMTS
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Figure 1 SASU for G/U 900MHz sharing feeder & antenna
SASU&SASA for G/U sharing feeder & antenna SASU&SASA is recommended in the application of GSM transmit carrier outputting through both antenna ports, SASA is used in combining two ports into one ports. It is suitable for sandwich frequency allocation between GSM & UMTS with bandwidth about 10MHz. It has the following features:
In downlink, the insertion loss of the SASU+SASA is typically 1dB.
In the uplink, the Noise Figure is not affected due to the Low Noise Amplifier in SASU.
Figure 2 SASA + SASU for G/U 900MHz sharing feeder & antenna