tma application & benefit

8/6/2019 TMA Application & Benefit

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www.pacificwave-wireless.com

Microdata Telecom Innovation AB


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In The Beginning

Microdata, has been active in the filter and

microwave business since 1981.In 1993, LGP Telecom AB was spun off, aiming forthe mobile telephony infrastructure market.

LGP introduced a product portfolio with TowerMounted Amplifiers (TMA) for all cellular bands,which more or less becomes the global industrystandard

t e l e c o m


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In 2003, LGP and Allgon merged to form a

new constellation with a wider product range,Allgon bringing one of the worlds bestantenna program.

t e l e c o m

In The Beginning


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Microdata has recruited several senior engineers

that previously worked together at LGP and Allgonon development of TMAs and RF filters.

A unique line of TMAs and filters designed to

customers specification for all mobile system bandsare offered and delivered to the international market.

We offer cavity filter design with integrated LNA andpower feeding by external PDUs.

A New Beginning


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The WiMAX market is expanding and the

broad band 3G are offering HSPA servicesthe wireless communication market is ever growing.

Our know-how is in understanding the marketrequirements, design and development

of products for Telecom.

In our road map, we have innovative productsthat will multiply the capacity and service

of wireless networks and mobile applications.

The Road Ahead

Stay Tuned


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R&D of TMAs for international mobile standards

Mechanical construction and cavity filter design Circuit development of LNA and TMA electronics CAD/CAM layout and production considerations Quality assurance

Using highly competitive and certified partners foroutsourced production

Our Competitive Edge

Most Important : We have come back to offerthe industry a choice, Freedom.


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A journey of a thousand miles begins with a single step


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Why TMA?

What is a TMA?

A Low noise receiver amplifier used to improve the up-linksensitivity of the BTS

Why is it necessary?

To extend coverage by providing network balance To reduce no of BTS sites

To improve the quality of service to the subscriber

To reduce the infrastructure cost to the operator

To increase data transmission rate in GPRS, EDGE andWCDMA systems


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Why TMA? Extended network coverage

Increased Revenue Generating Area

Greater user satisfaction

Improved Quality of service

Fewer dropped calls Improved speech quality

Improved data speed in mobile broadband services

Coverage when indicated

Improved mobile stand-by time


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Downlink (Tx)Signal from BTS

Uplink (Rx)Signal from mobile

Uplink imbalanceDue mainly to uplink

feeder loss

UplinkDownlinkdB

dB

Usable system coverage

Network Imbalance


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Downlink (Tx)Signal from BTS

Uplink (Rx)Signal from

mobilewhen TMA is

used.

System now inbalance with up-link

equal to down-link

DownlinkUplink dB dB

Old system coverage

Coverageimprovement

New system coverage

Network Imbalance with TMA


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Existing network with skeletal coverage

TMA Benefits - Coverage


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Adding TMAs completes the coverage

TMA Benefits - Coverage


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Coverage Extension


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Coverage Extension


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Call % without TMA

Blocked Calls

7%

No Service Calls

6%Dropped Calls

22%

Good Calls

65%

Good Calls

Blocked Calls

Dropped Calls

Nosiy Forward Calls

Noisy Reverse Calls

Noisy Calls Both Ways

No Service Calls

No Communications

MPIO Calls


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Call % with TMA

Blocked Calls

0%

No Service Calls

0%Dropped Calls

9%

Good Calls

91%

Good Calls

Blocked Calls

Dropped Calls

Nosiy Forward Calls

Noisy Reverse CallsNoisy Calls Both Ways

No Service Calls

No Communications

MPIO Calls


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System Call Statistics Using TMANumber of Good Calls Increased by 26 %

Number of Dropped Calls Reduced by 13.4%

Number of no service Reduced by 5.56%

Call setup failure / Blocked calls Reduced by 7.41%

Improvement


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CIN Cable

Tx/Rx RX

ID CIN

Power & Alarm CableRF Path

PDU

Base Station

TMA DD Twin

Typical 1 Sector with Diversity


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Benefits of TMA

Extended network coverage

By removing up-link limitation Reduce no of BTS sites

Improved Network Quality Fewer dropped calls

Higher call throughput

Satisfied subscribers


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Microdata TMA portfollio

Current Injector Power Distribution Unit

Tower Mounted Amplifier


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Product TMA DD TWIN

Our product range covers- 850 MHz

- 900 MHz both 30 and 25 MHz bandwidth

- 1800 MHz only and 1800 wth 900 MHzbypass. Products are available with bypass

for multi band antenna or for separateantennas

- 1900 MHz only and 1900 wth 850 MHzbypass. Products are available with bypass

for multi band antenna or for separateantennas

- 2100 MHz UMTS (AISG compliant)

TMA Twin 900235 x 280 x 83mm8kg


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Block Diagram TMA DD TWIN


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Product - CINWideband 824-2170Mhz

Low insertion loss 0.1dBReturn Loss: 20dB

Max RF power: 500W

DC Current: 1.6ACompliant to AISG signaling 1-11Mhz

Temperature: -40 C to +65 C

Ingress Protection: IP 44

Lightning Protection: 10 kA 8/20 s, 3 kA 10/350 s


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Product - PDU20-60 VDC, positive or negative

Input polarity protectionOutput 12VDC

Output voltage and current protection

Support up to 6 TMAs (3 sector configuration)Three pin alarm with NC and NO contacts

Connectors:

CIN 6 x SMB Male

DC Molex Microfit 2 x 2

Alarm Molex Microfit 1 x 3

218 x 125 x 43.5 mm


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Theoretical explanation for

TMA system


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Typical Site Configuration

Duplexer

Required Power = -113 dBm

S/N = 8 dB

Noise Floor : KTB = -121 dBm @ 200 KHz

RX Sensitivity = -108 dBm

BTS

A

Loss = 2.7 dB

Antenna

Loss = 0,5 dB

RX NF= 5 dB

Required Power = -104,5 dBm

Detection

Jumper Cable, 1 m

(CELLFLEX LCF 1/2")

Loss = 0.3 dB

Feeder Cable, 50 m(HF 7/8" Cu2Y)

Overall Noise Figure

NF = 8,5 dB


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Site Configuration with TMA

Duplexer

Required Power = -113 dBm

A

TMA

Loss = 2.7 dB

Antenna

Loss = 0.2 dB

RX NF = 5 dB

Required Power = -109,9 dBm

Detection

Loss = 0.5 dB

NF = 1.8 dB

Gain = 12 dB

Bias Tee

Overall Noise Figure

NF = 3.06 dB

Feeder Cable, 50 m(HF 7/8 Cu2Y))

Loss = 0.3 dBJumper Cable, 1m(S 07262 BD)

S/N = 8 dB

Noise Floor : KTB = -121 dBm @ 200 KHz

BTS


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dB = 10 log(X)X = 10(dB/10)

NF = NF1 + NF2 -1/G1 + NF3-1/G1.G2 + ...

NF1 NF2 NF3 NF4

G1

Values has to be converted to absolute value.

Thus, after the amplifiers

(12)10

10( )

(2.7 + 0.2 +0.5 +5)

1010 - 1

( )(1.8)10

10( )

+NF = 0.3dB + 10 log

NF = 0.3dB + 10 log (1.51 +5.92/15.84)

NF = 3.06 dB (Improvement of 5.44dB)

Friis formula for noise figure

tma application & benefit

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