Helios FDD-LTE1800MHz ICS Digital Smart Repeater field trail in basement parking for China telecom jiangsu branch

2017-08-25 11:37:52 zoutaihua 10

2014/8/15

This field trail locates in a basement parking,where has been rebuilt as a temporary office space without any FDD-LTE1800 source signals inside. The outside source signal will be wireless coupled by the donor antenna connected via coaxial cable to Helios FDD-LTE ICS Digital Smart Repeater and then extend the amplified signals through the indoor DAS to the indoor coverage areas.

 

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The receiving outside source signals status are around as :
 RSRP:-80dBm, SINR:18, download speed:23Mbps

Summary the amplified signals performance after through the Helios FDD-LTE1800 ICS Digital Smart Repeater(output power 37dBm, Gain95dB):

 1. The FDD-LTE1800 ICS Digital Smart Repeater runs well under the requirements, there is almost no influence and negligible noise affect to RRU, and supports to coverage the demand areas where the fibers could not touch over. 
 2. Almost no influence to the noise of RSSI with download service, around 25dB performance increased for the upload service,and this is equal to the performance under RRU coverage.
 3.Compared with the directly testing under RRU coverage, the PUSCH TX was higher, this should be caused by the RSRP is not so strong as directly under RRU coverage.

Below list the detail testing results for reference:
* RSRP
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The RSRP are mostly around above -95dB


*SINR
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The SINR are most around 10~15dB


*PUSCH TX
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TX is around 15-20db,TX under upload little higher than download


* Upload Speed
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Most of upload speed are around 15Mbps


*Download Speed
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Most of download speed are around 20-40Mbps