R&S®CA250 Bit Stream Analysis

Analysis and manipulation of signals at bitstream/symbol stream level

Key Facts

  • Import of various symbol stream/bit stream formats
  • Symbol-to-bit mapping and bit stream representation
  • Versatile bitstream analysis functions

Brief Description

In the field of technical analysis of modern communications signals, the ability to analyze the characteristics of demodulated signals with unknown codings is of major importance.

Features

  • Versatile data import and symbol stream/bit stream representation
  • Versatile bit stream analysis functions
  • Advanced code analysis functions

Specifications

Options Version
R&S®CA250-E Extended Bit Stream Analysis and Decoding
R&S®CA250-P Professional Bit Stream Analysis and Decoding
R&S®CA250-CA Code Analysis

Key Facts

  • Import of various symbol stream/bit stream formats
  • Symbol-to-bit mapping and bit stream representation
  • Versatile bitstream analysis functions
  • Wide variety of bit manipulation functions
  • Integration of user-specific algorithms into the R&S®CA250 operation sequences
  • Programmable script control for performing automatic analysis sequences

Brief Description

In the field of technical analysis of modern communications signals, the ability to analyze the characteristics of demodulated signals with unknown codings is of major importance. In addition to various symbol stream/bitstream representations, R&S®CA250 provides a large number of powerful analysis algorithms and bitstream manipulation functions.

By selectively using these tools, the user can obtain technical data from the unknown bit stream. This data provides information about the type and content of the analyzed signal. Ideally, it is possible to resolve all aspects of the unknown code, thereby allowing the user to program a specific decoder for the unknown signal (e.g. by using the R&S®GX400ID decoder development environment).

Features & Benefits

  • Versatile data import and symbol stream/bitstream representation
    • Import of various symbol stream/bitstream formats
    • Symbol-to-bit mapping and bitstream representation as 0/1 and -/X representation as well as graphical visualization
  • Versatile bitstream analysis functions
    • Structure analysis
    • Statistical methods
  • Advanced code analysis functions
    • Automatic recognition of channel codings (convolutional, Reed-Solomon codes, etc.)
    • Manual expert analysis tools
  • Wide variety of processing functions for channel-coded bitstreams
    • Standard manipulation such as deletion, inversion, multiplexing and demultiplexing
    • Complex bitstream processing methods such as descrambling, deinterleaving
    • Processing of channel codings (convolutional, Reed-Solomon and other codes)
  • Payload analysis and processing
    • Automatic detection of typical payload structures
    • Various alphabets
    • Digital voice codecs
    • Processing of compressed data
  • Automation, extensibility and versatility
    • Integration of user-specific algorithms into the R&S®CA250 operation sequences
    • Programmable script control for performing automatic analysis sequences
    • Various user-configurable and extensible functions

Specifications

R&S®CA250 bitstream analysis
Analysis algorithms Autocorrelation
Cross-correlation
Configurable pattern search
Tsallis entropy
Maurer test
Chi-square test
Histogram
Calculation of column sum/parity
Calculation of line sum/parity
automatic peak and notch detection for diagrams
Decoder and manipulation functions Symbol-to-bit conversion
Conversion of differential coding to absolute coding
Line codes
NRZ-L
NRZ-M
NRZ-S
Boolean operations
Multiplexing
basic demultiplexing
Extract items
Symbol-to-symbol mapper
Symbol adder
Channel serialization
ASCII alphabet
Baudot (ITA2) alphabet
ITA3 alphabet
ITA476-5 alphabet
ITA2-P alphabet
RUM-FEC alphabet
HNG-FEC alphabet
Varicode alphabet
Huffmann alphabet
user-defined alphabets
Representation Symbol stream/bitstream in tabular form
Decimal representation (0/1)
Hexadecimal representation
–/X representation
Graphical visualization
Display of demodulation quality as color-coded background
Tags for start-of-burst
Tags for the first channel (in multichannel methods)
Zoom functions
Line charts
Window for displaying decoded text
tabular data display for analysis and protocol data
System functions Generation of reports in XML format (compatible with R&S®ReportEdit)
Recommended computer equipment
Operating system Windows
CPU (minimum) Intel Pentium IV, 3 GHz
Memory (minimum) 1 Gbyte
Graphics card OpenGL 1.4 capable
Hard disk memory (minimum) 500 Mbyte (for installing R&S®CA250)
Minimum screen resolution 1024 pixel × 768 pixel
Sound playback Sound card
R&S®CA250-E extended bitstream analysis
Analysis algorithms Search for CRC codes
Search for BCH codes
Search for Reed-Solomon codes
Analysis of rate 1/N convolutional codes
Analysis of 1/N to rate K/N punctured convolutional codes
Analysis of rate K/N convolutional codes
Search for the most common polynomials
Decoder and manipulation functions Block interleaving
Block interleaver with skip bits
Cross interleaving
Convolutional interleaving
Helical interleaving
CRC decoder
BCH decoder
Reed-Solomon decoder
Viterbi decoder with/without puncturing
Golay decoder
bit destuffing
R&S®CA250-P professional bitstream analysis
Analysis algorithms Analysis of additive scrambling
Analysis of multiplicative scrambling
Analysis of spread spectrum code (DSSS)
Decoder and manipulation functions Additive descrambling
Multiplicative descrambling
Despreader
A-law/μ-law voice codec (in line with ITU G.711)
ADPCM voice codec (in line with ITU G.726)
LD-CELP voice codec (in line with ITU G.728)
CVSD voice codec (in line with STANAG 4209)
LPC-10 voice codec (in line with STANAG 4198)
MELP voice codec (in line with STANAG 4591)
Representation Audio player for playing back decoded voice codecs
R&S®CA250-PA payload analysis
Analysis algorithms bit-error-tolerant file detection
Decoder and manipulation functions LZRW1-3
Deflate
UUDecode
Sequence generator
R&S®CA250-CA code analysis
Analysis algorithms code classifier
bit-error-tolerant convolutional code analysis
polynomial factorization
polynomial division
greatest common divisor
code word statistics (mean value, variance)
minimum distance analysis
uniform sequence length analysis
Decoder and manipulation functions advanced demultiplexing
descrambling (in line with ITU-T V.35)
convolutional decoder (in line with IESS.303)
LDPC decoder
repetition decoder
Walsh decoder
R&S®CA250-D development edition
System functions
application automation via script control (Python)
linking of customer-specific algorithms via
Windows DLL interface
R&S®CA250-U licensing option
Option for licensing R&S®CA250 with a USB dongle with 2 Gbyte additional memory
Interface USB 2.0
Dimensions (W × H × D) 8 mm × 16 mm × 52.5 mm (0.31 in × 0.63 in × 2.07 in)
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