...The Best DVB-T/H Analysis Tool...
ArbIQ, Modulated Signal Creation Software
Solve your complex modulated signal generation needs
The ArbIQ software package allows wireless design and manufacturing engineers to use the most flexible signal generation tool, the Arbitrary Waveform Generator (AWG), to solve almost all their wireless test stimulus needs at baseband or IF/RF levels, no matter if the required signals are analog or digital. AWGs do not suffer most of the limitations of traditional generators as any signal, simple or composed, clean or noisy, ideal or impaired, can be downloaded to and played back by them. In order to get the most of this tool, test engineers must have the right signal creation and edition tools, not exposing them to the cumbersome details of the complex signals and the instrumentation.
AWGs, in the other hand, are only limited by their resolution, sampling speed, record length and intrinsic linearity. With devices reaching or exceeding 16-bit resolution, 12 GS/s and 80+dB SFDR, multi-carrier, channel coded, high quality signals can be generated easily. ArbIQ provides the wireless engineer with the right tool to easily define, analyze, and transfer such signals to the target AWG.
ArbIQ offers all the capabilities needed to use any AWG right in your signal environment: Baseband, IF, and RF. Mixed signal environments are not a problem as ArbIQ supports PAT formats used by digital outputs in both AWG and Pattern Generators making easy the integration of DSP based software-radio architectures.
Continuous signal generation requires seamless signal repetition. Modern AWGs provide seamless looping and sequencing but spurious-free signal generation requires continuity at all levels: sample, carrier, symbol, baseband filtering, and, in some cases, channel coding. ArbIQ takes care of all these requirements by automatically adjusting the carrier and modulation parameters and performing continuous signal convolution to eliminate simultaneously any wrap-around effects in all the component signals. The result is a clean signal without any degradation at all in any frequency, time, or modulation domain parameter, no matter the number of carriers or the modulation schemes (analog, QAM, FSK/MSK) involved.
CHARACTERISTICS
Modulation Scheme Support
Characteristics |
Description |
QAM |
QAM16, QAM32, QAM64, QAM128, QAM256, QAM512, QAM1024 with hierarchical modulation support. |
PSK |
BPSK, QPSK, OQPSK, Pi/4-QPSK, 8PSK, O-8PSK (EDGE) |
| ASK | Binary ASK with settable modulation index |
FSK |
2-FSK, 4-FSK, 8-FSK, 16-FSK, 32-FSK, MSK |
| Analog | AM, FM, PM. Sinusoidal modulation. Settable modulation index / frequency or phase peak deviation. |
| VSB | 8-VSB, 16-VSB |
CDMA |
IS95 (CDMAOne), 3GPP (UMTS) downlink including HSDPA |
User-defined |
User defined arbitrary constellation, externally defined symbols and IQ envelopes |
Other |
Bandwidth-limited Gaussian noise, Low-jitter clock generation |
Modulation Paremeters
Characteristics |
Description |
Base Band Filter |
Raised Cosine, Root Raised Cosine, Gaussian ( Dirac Input), Gaussian (Pulse Input), Rectangular, Triangular, EDGE, PRS (Partial Response), Half-sine, Butterworth, RZ, NRZ, User Defined |
Time Domain Windowing |
None, Triangular, Hamming, Hanning, Blackman, Blackman-Harris, Exact Blackman, Kaiser, Tapered Cosine, Flat Top |
| Filter Parameters | alfa, BT |
| Convolution Length | Minimum 3 Symbols, Maximum 201 Symbols, independently defined for each carrier |
FSK Modulation |
Peak Frequency Deviation |
Signal Impairments
Characteristics |
Description |
Linear Impairments |
Quadrature Error, Quadrature Imbalance, Carrier Feed-through |
| Non-Linear Impairments | AM/AM, AM/PM for base band (IQ) and amplifier non-linear behavior simulation. Hard and soft clipping simulation. |
General |
Impairments are defined independently for each carrier. |
Power Ramping
Characteristics |
Description |
Power Ramping Shapes |
Quadrature Error, Quadrature Imbalance, Carrier Feed-through |
Profiling |
Power profiles are defined in a carrier-by-carrier basis based in a user-defined transition table. |
Periodicity |
Impairments are defined independently for each carrier. |
Multi-Path
Characteristics |
Description |
Type |
Up to 10 different paths independently set for each carrier. |
Control Parameters |
Delay (positive or negative) and phase |
Delay Range |
+- (Convolution length)/2 |
Phase Range |
+- 180 Degrees |
Channel Coding
Characteristics |
Description |
DVB-C |
Internally defined TS (“all zeros”+ sync byte), sync byte inversion, Reed-Solomon, scrambling, interleaving, and differential coding |
IS95 (CDMAOne) Downlink |
Channelization/Spreading (Walsh Codes), scrambling |
| IMT2000 (UMTS) Downlink | 3GPP R5 support with channelization/Spreading (OVSF Codes), complex scrambling, C-CCPCH/SCH synthesis and time multiplexing, P-SCH and S-SCH relative power control, compressed mode and HSDPA (QAM16)support. |
IEEE-802.11b |
None, Gray, Differential, Gray Differential |
Payload Data
Characteristics |
Description |
Data Source |
Internal “all zeros”, Internal “all ones”, Internal PRBS, User-editable pattern, User defined |
Internal PRBS |
Any generation polynomial and seed up to 31 bits long |
| User-Defined Pattern | Any bit sequence up to 256 bits long. Sequence states may be '1', '0' or 'x' (internal PRBS). |
Data Coding |
None, Gray, Differential, Gray Differential |
Symbol Map Edition
Characteristics |
Description |
Maximum Symbol Number |
Up to 1024 symbols may be defined. |
Symbol Definition |
I/Q or Magnitude/Phase pairs. |
| Predefined Maps | QPSK, 16QAM-1024QAM, Symbol in a circle. |
| Additional Settings | Time-domain Q samples may be delayed by half a symbol time (offset modulations). Constellations may be rotated symbol to symbol by a user defined angle. |
| Edition Tools | Offset addition, Phase Rotation, Scaling. |
Analysis Tools |
Edited map graphic preview (constellation display). |
Multi-Carrier Support
Characteristics |
Description |
Maximum # of Carriers |
512 |
Functionality |
Any number of carriers with similar characteristics can be defined at once. |
| Carrier Frequency Parameters | Base and spacing frequencies. |
| Carrier phase control | Fixed or random (low correlation) |
| PRBS control | PRBS polynomial is common but seed value may be sequenced to avoid data sequence related correlation problems resulting in high Crest Factor values. |
Waveform Compilation Control
Characteristics |
Description |
Record Length |
Record Length may be defined in samples, symbols or DVB-C/IS-95/UMTS frames |
Sampling Rate |
Sampling rate is automatically set based on the maximum carrier frequency or symbol rate and a user-defined oversampling factor. |
| Amplitude Control | Amplitude is automatically adjusted to use the complete AWG dynamic range or it can be manually set to any value. |
Wrap-around Control |
None or automatic. Automatic carrier phase consistency. |
Analysis Tools
Characteristics |
Description |
Spectrum |
FFT (8192 samples) of the combined signal. Quantization noise based in actual performance of the target instrument’ DAC. |
Phase Diagram |
Selected or combined (for CDMA) signal. Symbols position shown in low intensity mode. |
| Constellation Diagram | Selected or combined (for CDMA) signal. Phased diagram shown in low intensity mode. |
CCDF |
For selected or combined signal. Cursor linked to the curve. |
| Histogram Display | Phase diagram gray scale display with gamma control showing up to 500,000 samples. I and Q histograms for user defined areas. |
| I, Q | Time domain I,Q displays |
| Eye Diagram | I and Q eye diagrams showing 2 bit intervals |
| Magnitude | Power vs Time display |
Coherent Optical Signal Generation (opt. OPT)
Characteristics |
Description |
Specific Impairments |
Chromatic Dispersion (CD), Polarization Mode Dispersion (PMD), I to Q delay/skew |
Jones Matrix Emulation |
Two and four channel support to emulate Dual Polarization Multiplexed systems. |
| Specific Analysis Tools | Power Eye, Delay Line Interferometer emulation |
RADAR Signal Generation Option (opt. RDR)
Characteristics |
Description |
Specific Modulation Schemes |
Linear Frequency Modulation, Bi-Phase Barker Codes, Polyphase Codes, Frank Codes, Chirp Generation |
Pulse Control |
Pulse time profile, pulse jitter, amplitude and frequency hoping support. |
| Pulse Shape | Trapezoidal, Raised Cosine, Custom |
Beam Emulation |
Sinc and Gaussian beams with variable width and rotation speed |
Supported Instruments
Characteristics |
Description |
Tektronix |
AFG3000 Series, AWG400/500/600 Series, AWG5000 Series, AWG7000 Series |
Tabor |
All WonderWave and WaveXciter Series |
| Agilent | 33000 Series, 80180A, 81160A, 81150A, N824XA, M8190A |
TTi |
TG and TGA Series |
| LeCroy | ArbStudio Series |
| Active Technologies | AR-AWG GS, AT-AWG500/2000/4000, AT-1120/AT-1212 |
| B&K Precision | 407X Series, 408X Series |
| Rigol | DG1000/2000/3000/4000/5000 Series |
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