User's Manual

User Manual for POD Systems Revision: 0.7
© KMW USA Inc.
1818 E. Orangethrope Ave, Fullerton, CA 92831
Tel. [phone]
www.kmwcomm.com
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- The cable with SMB-L connector provides more stable tight connection because SMB-L connector has lock
function, comparing to SMB connector. The cable with SMB connector might be untied or loosened easily
by vibration or unintentional cable pulling.
- The RF cable with SMB connector can be used instead of the RF cable with SMB-L connector because SMB-
L connector has compatibility with SMB connector.
1.2 POD System Architecture
Figure 1-1 represents the overall DAS block diagram of KMW DAS system, POD.
POD consists of HEU (head-end Unit), and RU (Remote unit). HEU provides the interface between plurality of
BTS and plurality of RUs, and RUs are deployed over multiple shadow regions to provide wireless service coverage
to mobile users in shadow regions.
Figure 1-1 DAS Overall Block Diagram
Figure 1-1 shows general signal flow and module composition of POD DAS system.
POD DAS System supports various methods to connect with BTS such as direct connection to BTS through RF
coaxial cable, connection to BTS via antenna through BDA, and connection to BTS by CPRI digital interface over optic.
If user wants air interface with BTS, it is necessary for user to select proper BDA product separately because POD
DAS system does not include any kinds of BDA.
H-FEM provides the interface between various base station having different frequency band/technology and
POD DAS system, and H-COM combines downlink signal received from H-FEM and distributes uplink signals received
from DTM to FEM. H-DTM combines downlink signals from H-COM and then distributes to H-HOM, also combines
uplink signals from several H-HOM and then distributes to H-COM. H-HOM converts downlink RF signal received
from H-DTM to optic signal and then transfers to RU, also converts uplink optic signal received from RU to RF signal
and then transfers to H-DTM. RU provides wireless service coverage to users by transmitting downlink signal received
from H-HOM through the antenna. Also, it transfers to HOM after converting uplink signal received from mobile
stations through the antenna to optic signal.
Remote Sites Building #2Building #1
IDF #3
IDF #2
IDF #1
MDF
Remote Site #2
Remote Site #1
Remote
eNB
OIM-B OIM-S
Optic(RF)
FEM
FEMeNB
RF
Optic(CPRI)
FEM
RF
BDAeNB
Air Interface
FEMeNB
RF
FEMeNB
RF
Remote Site #3
FEM
RF
BDAeNB
Air Interface
COM-8 DTM 8x8
STM 8x4
COM-8 DTM 8x8
DTM 8x8
OEM-S
RU
Optic
Optic
OEM-B
HOM
RU
Optic
HOM
RU
Optic
HOM
IDF #3
IDF #2
IDF #1
RU
RU
RU
Optic
IDF #4
RU
Head-end
MDF: Main Distribution Frame
IDF: Intermediate Distribution Frame
COAX
OPTIC
CPRI