Hello GNU Radio team,
I have a project I'm working on which is about Obtaining SIB1 messages from captured DL IQ data been taken from CPRI link prop, a Complex Input.
Kindly to advise on how to decode SIB1 messages using the GNU Radio, using this complex DL IQ as input data.
- I have captured some DL IQ data from CPRI Prob between the LTE BBU & RRU, and I'm interested in decoding the messages to get mainly the Frequency Band Indicator (freqBandIndicator), which is the operating frequency band of the cell as defined in TS 36.101, mainly to know which band this data related to.
For example, If the CPRI link has 8 AxC “antenna carriers” for two bands, B1 has 4 AxC, and the other second band has the remaining 4 AxCs.==> I'm interested in decoding the SIB1 messages from this captured DL IQ data so I can know which AxC is belong to which band.
- Sample rate is 15.36 Mega samples/second.
- The captured IQ data coming from real-time streaming over the CPRI link between a BBU & RRU of LTE telecom site. Samples from these data are listed below.
How to achieve this in GNU Radio?
Thanks in advance.
Samples from the first band:
SegmentLength = 308736,SegmentLength = 308736,SegmentLength = 308736,SegmentLength = 308736
-1480-796j,58-52j,1347+896j,-2546+811j
-130+303j,1571-1090j,1371+2119j,-1653-1267j
253+1436j,971-1526j,464+1796j,-1375-817j
-1138+1343j,-471-145j,23-147j,-1869+1310j
-1320-536j,-1214+788j,377-720j,-794+1740j
Samples from the second band:
SegmentLength = 308736,SegmentLength = 308736,SegmentLength = 308736,SegmentLength = 308736
33-397j,-550-15j,1924+1456j,1275-1671j
-103+36j,-386-142j,-96+1107j,1639-1555j
76+175j,188+59j,-1172-381j,634-109j
120+118j,529+383j,-1110-1353j,-849+916j
Kind Regards,
Hassan Al Shekha.
Sr. Sales Engineer
Proud to be on Crain’s Eureka index of Chicago’s most innovative companies
ISCO International
A 444 State Parkway, Suite # 123 • Schaumburg, IL 60173
M +1(469)258-2812 
halshekha@iscointl.com
E Hassan.Al.Shekha@iscointl.com
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