1. SUN
Tutorial on USRP
Xiuzhen Guo

2. SDR Make it comprehensive Intro to Software-Defined Radio
Intro to Universal Software Radio Peripheral
Intro to GNU Radio
Applications
Software——GNU Radio
Hardware——USRP
SDR

3. What is SDR? Part 1 Joe Mitola of MITRE
Using software to realize the radio functions
Joe Mitola of MITRE
In IEEE National Telesystems Conference

4. ADC DAC Structure of SDR Baseband processing Digital Down-converter
Up-converter
RF Section
Radio Frequency
IF Section
Intermediate Frequency
Baseband Section

5. Function Performance Advantages of SDR Re-configurability
Strengthen the possible potential applications
Evolve to a new standard conveniently
Multifunctional devices
Multi-mode
Multi-band
Shorter time-to-market
compatibility
Performance
Lower hardware cost
hardware module
widespread applications
Different hardware
Different demand
Improve development efficiency
 open architecture 

6. Part 2
What is USRP？
USRP: Universal Software Radio Peripheral
PC RF

7. Overall architecture
Mother board
Daughter board
CPU
FPGA
USRP N210

8. USRP RIO USRP N210 USRP 2 USRP 1 History of USRP Performance 120MHz
 duplexing
40MHz
最高支持120MHz
Lower latency
USRP RIO
Performance
120MHz
accuracy
bandwidth
speed
USRP N210
16MHz
Simplex
20M
Millisecond
USRP 2
16MHz
频率范围 应用
50MHz-2.2GHz
FM、雷达、GSM、ISM
70MHz-6GHz
FM、蓝牙、GSM、ISM …
USRP 1
Price

9. USRP N210 A:transmitting B:mimo cable link C:receiving Improved Freq
D:firmware loaded
E:reference lock
F:CPLD loaded
Improved Freq
Accuracy w/ GPS Clock Option
Multiple Device Synchronization
RF1/RF2
MIMO Expansion
Gigabit Ethernet Interface to Host
Power
6v/DC/3A

10. Compositions Daughter Board： Mother Board： RF front end
Cover different frequency range Convertible
Mother Board：
 high-speed signal processing
ADC/DAC/FPGA/I/O

11. Features of USRP N210 Use with GNU Radio, UHD
Gigabit Ethernet Interface to Host
Modular Architecture: DC-6 GHz
2 Gbps Expansion
Dual 100 MS/s, 14-bit ADC
1 MB High-Speed SRAM
Dual 400 MS/s, 16-bit DAC
Auxiliary Analog and Digital I/O
DDC/DUC with 25 mHz Resolution
2.5 ppm TCXO Frequency Reference
Up to 50 MS/s Gigabit Ethernet Streaming
0.01 ppm w/ GPSDO Option

12. But it is not enough to achieve several functions with only USRP

13. Part 3
What is GNU Radio？
A free & open-source software development toolkit that provides signal processing blocks to implement software radios.

14. The Installation of GNURadio
Attention:
1> Updata Ubuntu
2>UHD failed——Network problems
3>IP: ; ;
4>Wait quite a while (15:10~18:05)
5>_uhd_find_devices

15. GRC $ gnuradio-companion Toolbar Library Searching for blocks
Workpalce
Terminal
Searching for blocks

16. Throttle
Make sure it does not consume 100% of your CPU cycles and make your computer un responsive

17. Example
waveform display
（a）complex
（b）float
（a）
（b）

18. Modifying block properties
Parameters list

19. Blocks
Help Types
Different color represents different data types

20. How to make our own blocks?
Make blocks
How to
make our own blocks?
Take QPSK_demod as an example

21. QPSK(4QAM) 00（1+1j） 01（1-1j） （-1+1j）11 （-1-1j）10 Without Gray coding
With Gray coding

22. How to make our own blocks?
1. Using gr_modtool

23. Three types of block file
Block:qpsk_demod
Four types of block
Three types of block file
Synchronous (1:1)
Decimation (N:1)
Interpolation (1:M)
General/Basic (N:M)

24. Modifying the python block file

25. QA tests

26. QA tests
Test result

27. XML files

28. Installation
success
What should we do?
new block

29. Running
Take an example to achieve the function of qpsk_demod

30. What can we do with USRP and GNU Radio?
Part 4
What can we do
with USRP and GNU Radio?
operations related with the waveform
Modulation
Demodulation
Spreading spectrum
Despreading
Coding
decoding
Sample
FFT
Digital up convert
Digital down convert
high speed processes

31. Uhd_fft(2.4GHz)
 Observe signals in 2.45GHz with USRP

32. Uhd_fft(2.4GHz)
Results

33. mZig: Enabling Multi-Packet Reception in ZigBee（MobiCom 2015）

34. Collisions Examples of collisions With chip-level time offset(CTO)
Without CTO

35. Decomposing RX L1 L2 L3 L4 L4 Alice 1 1 0 0 0 Bob 1 0 1 0 0
Amplitude Combination based Decomposition
(AmpCoD)
Cross Interference Cancellation(CrossIC)

36. Flow chart
Flow chart in Dmzig module

37. Physical layer
Physical layer of TX and RX with mZig

38. Testbed Why we choose USRP instead of other devices?
TX: USRP B210*6 + Laptop*6 + iRobots*6
RX: USRP X310 + PC
Why we choose USRP instead of other devices?

39. More
DVB - T real-time communication system(the University  of Pisa, Italy）
/msg11639.html
SmartRadio, a cognitive radio program ( Virginia Tech University , USA)
Tests of MIMO and multi-hop network (University of Texas, USA)

40. SUN
Thanks
Question & Answer