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VITA 49
VITA Radio Transport (VRT)
A Spectrum Language
for
Software Defined Radios
9-Sept-2014
Presenter:
Robert Normoyle, JHU/APL
Program Manager: Debra Hurt, JHU/APL
This work is funded by
Office of Naval Research Code 312
DISTRIBUTION A: Approved for public release
AGENDA
 Overview of analysis effort for required attributes

Joint Open Architecture Spectrum Infrastructure (JOASI)
 VITA 49 Overview and Enhancement Recommendations
 VITA 49 Use Cases
DISTRIBUTION A: Approved for public release
Enhancing the
Open Architecture Process
DISTRIBUTION A: Approved for public release
Interoperable Framework:
Enabler for Real-Time Control of the EMS
Spectrum operations without
a spectrum language
Spectrum language:
- Policy (play) based
- Real-time updates
Spectrum language:
key to victory in the EMS
Domain
Each platform does what is
best from its perspective
DISTRIBUTION A: Approved for public release
Enhancing DoD Open Architecture Approach
Typical DoD Open Architecture (OA) Approach
Open
architecture
standards
defined
Vendors
Analyze
government
requirements
Govt. Acquisition
specify OA and
technical
requirements
Vendor
selects
“best suited”
OA
standard
OA standard
defined independent of government
requirements
Govt Team
steer OA
Standards
Org’s
Vendor
modifies OA
definition. Add
proprietary
elements
Often OA standards do not
fully meet requirements
Industry
builds components and systems
ONR Approach
Govt Team
Analyzes
Diversity of
App’s
& Req'ts
Interoperability
Govt Team
Develops
OA Core
technologies
Govt Team
develops
reference
designs
Early government investment in OA process
yield OA standards to support future systems
Govt Team
demonstrates
OA profile
viability
Govt Matures
Key Tech
Component
DISTRIBUTION A: Approved for public release
Govt
Oversees
OA
Interoperability
Govt Acq
Program
Specifies
proven
OA profile
What is an Architecture, Framework Infrastructure?
Architecture
•
Use specific HW & SW components
• JTRS & SCA are examples
Framework
Standards that provide a wide diversity of capability
• Applicable to many applications
• Applicable to many architectures
• A building blocks to specify architectures
• Examples: V49, IEEE 1900, Pub 8
Infrastructure
A collection of orthogonal “Frameworks” integrated together to provide
greater functionality than each standard by itself
Class
A sub-set of a standard(s) attribute used for a specific
implementation/application - Narrowband HF may have different attributes
than ultra wide band X-Band
DISTRIBUTION A: Approved for public release
Spectrum Infrastructure
Multi-Function
EW
Requirements
Joint
Open
Architecture
Spectrum
Infrastructure
Cognitive
Radio DSA
( IEEE 1900
DySpan)
Real-Time
Data Transport
(V49)
EW
Networking
( Iron Symphony)
Spectrum
Management
( SSRF / Pub 8)
Joint Open Architecture Spectrum Infrastructure (JOASI)
•An enabling technology for future radio architectures and spectrum applications:
•
Spectrum de-confliction
•
Improved situational awareness
•
Improved jamming effectiveness and capability
•
Dynamic Spectrum Access
•
Alternative Position Navigation and Timing
•
Framework for multi-function RF applications
DISTRIBUTION A: Approved for public release
JOASI Team Members and Observers
Team Members:
• ACS (Telcordia)
• ArgonST (Boeing)
• BAE
• DRS Signal Solutions
• General Dynamics
• ITT
• JHU/APL
• Northrup Grumman
• Pentek
• Shared Spectrum Company
• URS
Other Participants at meeting:
• CERDEC
• DISA/DSO
• ONR
• OSD
• MITRE
• MIT
Other Participants
• DARPA
• NSA
DISTRIBUTION A: Approved for public release
What is JOASI?
JOASI: An Enabler for Spectrum Interoperability
DISTRIBUTION A: Approved for public release
JOASI: Spectrum Standard Types
DISTRIBUTION A: Approved for public release
VITA 49 Overview
and
Enhancement Recommendations
DISTRIBUTION A: Approved for public release
Comparison of SCA to VITA
Software Communications Architecture (SCA)
Application Resources
CF Interfaces
CORBA APIs
AEP
ORB and
CORBA
Services
Core Framework Control,
Services, Devices, and
File access
Operating System
 SCA Characteristics



Application specific – Communications
Defined architecture
Defined components
 VITA 49




Application independent
Does not define an architecture. It is a framework
Does not define components. It can be used to define interfaces between components
Could be leveraged as an application interface for SCA systems
DISTRIBUTION A: Approved for public release
Overview of VITA 49.0
Transport Definition: Digitized Signal Data and Sensor Settings
 Interoperability:


VRT provides a framework to define interoperable sensor architectures
Link independent
 Sensor Synchronization/ Time Stamped Data:

Synchronization of multiple receivers in same/different platforms

Coherency between multiple receivers co-located in same platform provides
synchronization/coherency of multiple sensors
 Multiplexing:

Protocol to enable multi-channel signal data and context data to be sent over a single link
 Signal Data:

Data packet definition and broad range of data types defined: 1-32 bits real, complex, alignment,
event flag
 Sensor Settings:

Provides a mechanism to convey sensor settings (context packets) relevant to geo-location
processing
 Geolocation:

A standard that provides location, inertial navigation and look angle of sensors
DISTRIBUTION A: Approved for public release
VITA Protocol Elements
 Signal Data Packets


Purpose: Convey digitized instantaneous frequency (IF) and RF
signal data
Construct:
–
–
–
–
Packet Identifiers
Timestamp
Signal Data: 1-32 bits real, complex, floating point, vectors, event flags
Trailer
 Context Packets


Purpose: Convey information on the SDR settings and spatial
information
Construct:
– Packet Identifiers
– Timestamp
– Context Fields: Frequency, bandwidth, power, gain, delays, sampling rate,
overload, valid data, event flags
DISTRIBUTION A: Approved for public release
VITA 49 Generic Tuner/Receiver
Block Diagram
Antenna(s)
Reference
Point ID
...
Reference
Point ID
Reference
Point ID
Reference
Point ID
I&Q Data
RF Super-Heterodyne Tuner -Receiver
Analog to Digital Converter
(Digitizer)
Over-Range
Count
IF Tuning Freq
Reference & Offset
Level
Bandwidth
Setting
Reference
Point ID
I&Q Data
Signal
Processing
& Filtering
IF Data
Packetizer
(VRT)
Time Stamp
Adjustment
Network
Interface
IF Context
Packetizer
(VRT)
AGC / MGC
Gain Settings
RF
Tuning Freq
& Offset
1PPS /
10 MHz
Timing
Reference
Time Of Day
Clock
GPS
Receiver
- IF Data
Payload
Format
ADC Clock
Sample Rate
GPS
Location
- Context
Association
Lists
Integer
& Fractional
Time-Stamp
Generation
- State &
Event
Indicators
Calibration Time
Temperature
GPS ASCII
Device ID
DISTRIBUTION A: Approved for public release
Command
& Control
Processing
INS Location
ECEF Ephemeris
Relative Ephemeris
Ephemeris Reference ID
Functional Description of VITA 49.0 & 49.1
Digital IF
Signal Data Packets
Bit 31…..……….Bit 0
Header
Stream ID
Time Stamp (ps)
Context Data
Packets
Bit 31…..……….Bit 0
Signal Data
Payload
Radio
Header
Stream ID
Time Stamp(ps)
Context Field Select
Trailer
Frequency
Gain
Bandwidth
Discretes
Geolocation
. . . . . .
. . . . . .
Others
DISTRIBUTION A: Approved for public release
VITA 49 Packet Enhancements
SIGINT/
ES RF
Transmitter
EA RF
Transmitter
VRT
Receiver
VRT
Receiver
Existing VITA 49.0 Standard

IF Data & IF Context Packets

Associations / Pairing via Stream and Class
ID’s
VITA 49.2 Draft

IF Stimulus Packet (TX waveform real or
complex IF data samples)

IF Control Packet (RF TX signal control)
Additional JOASI Packet Types
•
Device Capabilities Packet
– Adds device to Iron Symphony
System Registry
•
Device Accuracy Packet
– Parametric accuracy for
associated Context Packet fields
•
Spectrum Data & Context Packets
•
Spectrum Stimulus & Control Packets
DISTRIBUTION A: Approved for public release
Proposed VITA 49.2
1. Device Control Packet
2. IF Stimulus (Exciter) Packet
DISTRIBUTION A: Approved for public release
New Packet Type: VITA Control Packet
 Control Packet in development
 Adds

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Message ID

Control/Ack Indicator

Control Indicator

Control Fields
7
6
5
Header (1 Word, Mandatory)
Controller/Controlee Unique
Identifier

8
Stream Identifier (1 Word, Optional)
Class Identifier (2 Words, Optional)
Integer-seconds Timestamp (1 Word, Optional)
Fractional-seconds Timestamp (2 Words, Optional)
Controller Unique Identifier (UUID)
(4 Words, Mandatory)
Controlee Unique Identifier (UUID)
(4 Words, Mandatory)
Message Identifier (2 Words, Mandatory)
Control/Acknowledge Indicator Field (1 Word, Mandatory)
Reserved, Must be 0 (1 Word, Mandatory)
Control Indicator Field (1 Word, Mandatory)
Control Fields
(Present as indicated by the control indicators)
DISTRIBUTION A: Approved for public release
4
3
2
1
0
Spectrum Packet Enhancements
• Spectral Type Information to convey via V49
–
–
–
–
Antenna pattern
Filter characteristics
Emission characteristics
Spectrum Analyzer
(Power vs. angle)
(Power vs. Frequency)
(Power vs. Frequency)
(Power vs. Frequency)
• Spectrum Analyzer Attributes
–
–
–
–
–
–
–
Center Frequency
Span
Sweep rate
Resolution BW
Video BW
Detector type (peak, average…)
Threshold
DISTRIBUTION A: Approved for public release
Example Spectrum Survey Control Packet
 Example Usage of VITA Control
Packet for Controlling
Spectrum Analyzer
 Various Control Fields
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
Packet Type
1 0 0 0
TSI
TSF Packet Count
Packet Size
1 1 0 0
Class Identifier (2 Words)
Fractional-seconds Timestamp (2 Words)
Center Frequency
Controller Unique Identifier (UUID)
(4 Words)

Span
Controlee Unique Identifier (UUID)
(4 Words)

Sweep Rate

Start/Stop Frequency

Resolution Bandwidth
Message Identifier (2 Words)
Control/Acknowledge Indicator Field (1 Word)
0x00000000
Control Indicator Field (1 Word)
Center Frequency Integer (43..12) Hz
Center Frequency Integer (11..0) Hz
Center Frequency Fraction (19..0) Hz
Span Integer (43..12) Hz
Span Integer (11..0) Hz
Span Fraction (19..0) Hz
Start Frequency Integer (43..12) Hz
Start Frequency Integer (11..0) Hz
Start Frequency Fraction (19..0) Hz
Stop Frequency Integer (43..12) Hz
Stop Frequency Integer (11..0) Hz
Stop Frequency Fraction (19..0) Hz
Resolution Bandwidth Integer (43..12) Hz
Resolution Bandwidth Integer (11..0) Hz
Resolution Bandwidth Fraction (19..0) Hz
Acquisition Bandwidth Integer (43..12) Hz
Acquisition Bandwidth Integer (11..0) Hz
Acquisition BandwidthFraction (19..0) Hz
Sample Rate Integer (43..12) Hz
Sample Rate Integer (11..0) Hz
Sample Rate Fraction (19..0) Hz
Sweep Rate Integer (43..12) Hz
Sweep Rate Integer (11..0) Hz
Sweep Rate Fraction (19..0) Hz
 Each field supports
44 bit integer portion
– 17.6 THz

4
Integer-seconds Timestamp (1 Word)


5
20 bit fractional portion
Radix Point
– 0.95 µHz
DISTRIBUTION A: Approved for public release
3
2
1
0
VITA 49 Use Cases
DISTRIBUTION A: Approved for public release
Digital IF: Generic RF Receiver Example
GPS
Ant
Ant 1
Ant 2
...
Ant N
RF
Tuner 1
RF
Tuner 2
...
RF
Tuner N
A/D 1
A/D 2
...
A/D N
CK = 10
10 MHz Ref
Distribution
GPS
1 PPS
11
1 PPS
21
Time of Day
DDC 2
22
. . .
DDC
(N) 29
FPGA: Non-Blocking Switch and Time Stamp
1024 pt
FFT31
1 PPS
N
FPGA: Non-Blocking Switch and Time Stamp
DDC 1
1 PPS
12
32K pt
FFT32
FPGA: Non-Blocking Switch and Time
Stamp
Receiver
Setting
External
Settings
41
.
.
.
VITA49
Formatter
Link Layer
(RapidIO, S-FPDP..)
42
DISTRIBUTION A: Approved for public release
Physical
Layer
(LVDS, Fiber Optic)
Multi-Channel: VITA 49 Control Packets
Ch N RF Out
Ch N Digital IF
Tx RF
Chain
RF / IF Channel N
Digitized IF Signal Data
Packets
RF / IF Channel 2
RF / IF Channel 1
Ch N Digital IF
.
.
.
Ch 1 Digital IF
I/Q
Modulator
Stored
Waveform
Ch 1 RF Out
Tx RF
Chain
Pseudo
Random
Ch 2 Digital IF
Ch 1 Digital IF
Buffered
Mod Cmd
Control
Packets
WF Cmd
PRN Cmd
Buff Cmd
Sel Cmd
Execute when:
TOD Time = Cmd Time
Cntrl Ch N
.
.
.
Cntrl Ch 2
Cntrl Ch 1
Translation to HW Settings
VRT Command Que & Controller
Time Stamp: Start + 100 usec
Frequency 2.0 GHz
Gain 3.1 dB
Time Stamp Start + 200 usec
Frequency 3.0 GHz
Gain 4.1 dB
Time Stamp Start + 300 usec
Frequency 4.0 GHz
Gain 3.9 dB
.
.
.
.
.
.
.
.
.
.
1 PPS
Frequency 17.0 GHz
Gain 2.6 dB
Time Stamp Start + 1700 usec
Frequency 18.0 GHz
Gain 3.3 dB
Time Stamp Start + 1800 usec
Frequency 2.0 GHz
Gain 3.1 dB
Local Time of Day (TOD) Counter
DISTRIBUTION A: Approved for public release
Ch N Status
.
.
.
Time Stamp Start + 1600 usec
100 MHz Ref
Context (Status)
Packets
Ch 2 Status
Ch 1 Status
Repeater
Note: the ‘Stimulus ID’ field shown in these
examples has been absorbed into the Dwell
Control List (described later)
DISTRIBUTION A: Approved for public release
Beamforming
Use ‘Fractional Sample Delay’ instead of
‘Timestamp Adjustment’?
DISTRIBUTION A: Approved for public release
Auto TX Dwell
DISTRIBUTION A: Approved for public release
Conclusion
 VITA 49 Enhances SDR system architectures
 Eliminates
stove-pipe architectures
 Enhances interoperability between components
 Standard for multi-channel phase coherent architectures
 Transport for multi-function SDR architectures
 2014 Enhancements
 Control
Packet
 Exciter Packet
 Spectrum Packet
DISTRIBUTION A: Approved for public release
DISTRIBUTION A: Approved for public release