Alexander Chemeris smart radio software OsmoDevCon March 2012 UmTRX – a hardware for GSM base...

Alexander Chemeris

smart radio softwareOsmoDevCon

March 2012

UmTRX –a hardware for GSM base station

Alexander Chemeris twitter: @chemeris e-mail: [email protected]

Presentation plan

1. What is UmTRX?

2. Technical details


UmTRX

A transceiver for• low-cost,• mid-range,• power-efficientGSM base station

(not a femtocell)


Open-Source Hardware

• Editable design files are published

• You're allowed to

o distribute,

o modify,

o manufacture.


Purpose and users

• Small/tiny carriers

• Developing regions

• Rural and isolated areas

… to avoid competition with Big Guys


Presentation plan

1. What is UmTRX?

2. Technical details


UmTRX architecture

1GigE

FPGAXilinx Spartan 6 LX75

Power GPSEB230

1 PPS

Rx

Tx

Rx

Tx

controlcontrol

Ref. Clock

TCXO26 MHz

duplexer +LNA+PA

duplexer +LNA+PA

Flash

LMS6002D

LMS6002D

SP

I

UA

RT

switch

switch

GPIO

GPIO

SRAM


UmTRX specification

• Dual TRX

• GPS-locked clock

• 5.25" form-factor

• 3mW output power

• Ethernet connection

15 voice channelscheap Power Amplifiersdiversity receive

no maintenanceno costly OCXO

many enclosuresfits into CD-ROM slot

standard for BTSamplifies to any value

standardreliable


LMS6002D

› Single chip transceiver› 375MHz-4GHz.› Programmable bandwidth:

1.5-28MHz› 12-bit ADC and DAC› Tx RF output +6dBm,

continuous wave

and NDA :)


Modified UHD firmware & software

Works with

• OpenBTS

• OpenBSC (soon? )

• GnuRadio


UmTRX Q&A

smart radio softwareAlexander Chemeris

[email protected]+7 (915) 330-7626

skype: Alexander.Chemeristwitter: @chemeris


Mayotte project

Coordinates12 50 S, 45 10 E

Square kilometers of land374 square kilometers

Population200,000*

Telephone lines5.2 per 100 people*

Mobile cellular subscriptions28.0 per 100 people*

* information of World Bank, 2009

Target

low-cost GSM network

affordable communications

uses open-technology

hack & learn


About Fairwaves LLC

• Moscow based company, founded in Jan 2011.• Focuses on development of cost-effective mobile access solutions.• Provides software and hardware development services in the area of SDR.• Owns world-leading IP in LDPC error-correcting codes, smart antenna systems

and wavelet filtering of RF signals.• Alexander Chemeris, CEO, holds Master degree in Computer Science and during

last 6 years was involved in various projects on VoIP, video-conferencing and wireless technologies as senior engineer, project manager and consultant, including many open-source projects.

• Prof. Dr. Sergey Portnoy, Chairman of the Board, received doctoral degree in 1992 for his achievements in cascaded modulation and coding schemes, nowadays known as OFDM. For the last 20 years he has been building wireless networks and promoting wireless access in Russia. At this moment he holds positions of WiMAX Forum Regional Director, Chairman of the board of ZAO Cedicom (equipment distribution),VP Strategy of ZAO Antares (emerging LTE operator).

Alexander Chemeris smart radio software OsmoDevCon March 2012 UmTRX – a hardware for GSM base...

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