Digital Communication System Modeling & Simulation for Prediction & Decision

Welcome to Nolta Simulated Systems Software (NSSyssoft).

Announcement:

New Iterative Message-Passing (Belief Propagation) Decoding Bit Error Rate (BER) results for Low-Density Parity-Check (LDPC) Coded Signaling over a Rayleigh Fading Channel (Memory Channel) has now been published on this website. The T1 Professional (T1 V2) system tool now supports LDPC Coded Signaling and Sum-Product Algorithm (SPA) Decoding for the Burst Channel (Classic Bursty with Background Noise & Gilbert-Elliot Burst); Fading Channel (Rayleigh, Rician, & Frequency-Selective); and InterSymbol Interference (ISI) Channel (with Linear Equalizer) Memory Channel models.

VIEW these SPA Decoding of LDPC Coded Signaling over a Rayleigh Fading Channel (Memory Channel) BER results and its analysis and LEARN more about this feature.

New Turbo Decoding Bit Error Rate (BER) results for Turbo Coded Signaling over a Rayleigh Fading Channel (Memory Channel) has now been published on this website. The T1 Professional (T1 V2) system tool now supports Turbo Coded Signaling and Turbo Decoding for the Burst Channel (Classic Bursty with Background Noise & Gilbert-Elliot Burst); Fading Channel (Rayleigh, Rician, & Frequency-Selective); and InterSymbol Interference (ISI) Channel (with Linear Equalizer) Memory Channel models.

VIEW these Turbo Decoding of Turbo Coded Signaling over a Rayleigh Fading Channel (Memory Channel) BER results and its analysis and LEARN more about this feature.

New Turbo Decoding Bit Error Rate (BER) results for Rate Matching Punctured Turbo Coded Signaling over a Rayleigh Fading Channel (Memory Channel) has now been published on this website. The T1 Professional (T1 V2) system tool now supports Rate Matching Punctured Turbo Coded Signaling and Turbo Decoding for the Burst Channel (Classic Bursty with Background Noise & Gilbert-Elliot Burst); Fading Channel (Rayleigh, Rician, & Frequency-Selective); and InterSymbol Interference (ISI) Channel (with Linear Equalizer) Memory Channel models.

VIEW these Turbo Decoding of Rate Matching Punctured Turbo Coded Signaling over a Rayleigh Fading Channel (Memory Channel) BER results and its analysis and LEARN more about this feature.

Iterative Message-Passing (Belief Propagation) Decoding Bit Error Rate (BER) results & their important impact on the use of Low-Density Parity-Check (LDPC) Codes for Reliable Digital Communications has now been published on this website. These results pertain to the T1 Professional (T1 V2) use of the Sum-Product Algorithm (SPA) in decoding Gallager, Array, and Repeat-Accumulate Coded Signaling over an Additive White Gaussian Noise Memoryless Channel.

VIEW these Low-Density Parity-Check (LDPC) Code Sum-Product Algorithm (SPA) Decoding BER results and its analysis and LEARN more about this feature.

Turbo Decoding Bit Error Rate (BER) results & their important impact on the use of Turbo Codes for Reliable Digital Communications has now been published on this website. These results pertain to the use of the Cross-Entropy (CE) Iterative Stopping Rule (SR) in a Turbo Decoder. The T1 Professional (T1 V2) system tool now contains a CE SR feature in the Turbo Decoder model along with the Fixed Number SR.

VIEW these Turbo Decoding & Cross-Entropy Stopping Rule BER results and its analysis and LEARN more about this feature.

Today, many possible powerful and complex Digital Communication (Information-theoretic) systems could be designed and built in an attempt to satisfy a set of System Requirements for a Target (field) design. The physical study, analysis, design, and/or evaluation of such a Real World system with all of its possible channel impairments (corruption) in the laboratory or field is nearly impossible using the scientific approach.

Consider the following points:

1) this prototyping hardware effort (building & testing a laboratory mock-up) would be a very expensive and time consuming endeavor because of the total number of possible system models (apparatus) that might need to be considered;

2) the creation/duplication of possible physical channel impairments such as AWGN (Additive White Gaussian Noise), Fading, ISI (InterSymbol Interference), etc. that would occur in the field operation of a particular system model is an extremely difficult task; and

3) the knowledge and technical skills required to actually build such a hardware prototype in a laboratory is only found in a few universities, corporations or institutions in the world.

These are some of the reasons why engineers, scientists, and mathematicians build computer models (software-based) of these systems and simulate (computer-based) their performance of these systems to study, analyze, design, and/or evaluate Coding methods to reduce the Error Rate of Information transfer of these systems.

Buy and Use the novel PC Computer-Based Advanced Digital Communication System Modeler (AdvDCSM) software system tool product: AdvDCSM DCSS (Digital Communication System Simulator) T1.

And Use T1's easy-to-use Bit Error Rate (BER)/Bit Error Probability (Pb) Plot Generation Feature to produce BER Plots of your Pb performance simulation results.

VIEW a BER Plot Generation Example and LEARN more about this feature.

T1 is available Worldwide via software DOWNLOADS (Electronic Distribution) to Customers in USA, CANADA, and OTHER SELECTED COUNTRIES.

NOT ALL MODELING and SIMULATION SOFTWARE ARE EQUAL!!!

T1 is a superb Digital Communication System (COMMSYS) Modeler & Simulator: for example, T1 contains and uses 'perfect' random number generators to perform a set of key (most important) functions of a COMMSYS simulator.

Consider that a COMMSYS simulator is only as 'good' as its capability to model & simulate Random Processes that are found in an Information Source and Channel (e.g., AWGN Memoryless). Confidence in its Simulated Bit Error Rate (BER) performance result is directly dependent on one's confidence in the validity of these simulated random processes.

Key Concept: to accurately model these random phenomena, the simulator generates a set of sequences of Independent and Identically Distributed (i.i.d.) random variables as pseudo-random numbers that exhibit the property of i.i.d. randomness.

The fidelity of a random process (es) simulation is dependent on the generation of "perfect" random numbers (perfect: no failure of a statistical test by these random numbers).

T1 allows easily the User to perform a statistical test on its generated discrete random processes. Also, T1 provides results of a simulation's random noise process to allow the User to gauge the validity of a simulation.

Thus, Use T1, the Digital COMMSYS Modeler & Simulator software tool that uses 'perfect' random numbers to generate its Simulated BER results.

Why you need T1, the AdvDCSM (Advanced Digital Communication System Modeler) system tool? Go to TUTORIAL for answer.

This tool "T1" is a Microsoft® Windows®-Based application tool and is UNIQUE in the new frontier in Intelligent Agent-Based Computer-Based complex System Modeling and Simulation. Take some leaps and bounds with T1 to make your research and classwork simpler, faster, and more reliable!!

Check out T1 vs. another product comparison.

T1 is AVAILABLE as a TRIAL VERSION that will allow you to use T1, a Digital Communication (Information-Theoretic) System Modeling and Simulation software tool, for a Limited Period without Charge and to learn about the valuable utility of T1 in the study, evaluation, and possibly design of certain Complex Digital Communication Systems first hand before purchase.

      

GET FREE TRIAL USE of T1, AdvDCSMT1DCSS by DOWNLOAD.

T1 Professional (T1 Version 2), the latest NSSyssoft system tool, is a great Computational tool for the "Working Engineer or Scientist" who deals with Digital Communications System Models and Simulations with an emphasis on Complex applications of a Convolutional or Block Code with a Memoryless Single Channel, Memory Single Channel, or Parallel MultiChannel; Complex applications of a Turbo Code (Parallel Concatenated Code) with a Memoryless or Memory Single Channel or Complicated applications of a Low-Density Parity-Check Code with a Memoryless or Memory Single Channel.

Check out the application of the T1 Professional to important problems related to the design of Wireless Digital Communications Systems.

T1 Professional provides the User the ability to use a Soft-Decision Outputs (SO) Single Iteration Decoder in a simulated Convolutional Coded Signaling over a Memoryless Channel system. This SO Decoder can use one of the following important algorithms: the Soft-Output Viterbi Algorithm (SOVA) or the 'Symbol-by-Symbol' MAP (maximum a posteriori probability) Algorithm (Log-Domain: Max-Log-MAP, Log-MAP, or MAP).

Check out the application of T1 Professional to important problems related to the Soft-Decision Outputs Decoding.

TURBO CODING and ITERATIVE DECODING (TURBO DECODING) feature has been added to the novel PC Computer-Based Advanced Digital Communication System Modeler (AdvDCSM) software system tool product: AdvDCSM DCSS (Digital Communication System Simulator) T1 Professional (Version 2).

A T1 V2 User can use Turbo Coding with a M-ary Modulation Scheme {M > 2 Modulation Scheme (M-PSK, M-PAM, M-QAM, or M-FSK where M = 4, 8, 16, 32, or 64) or a Binary Modulation Scheme [Binary Phase Shift Keying (BPSK), Binary Pulse Amplitude Modulation (2-PAM), or Binary Frequency Shift Keying (BFSK)]}

or Use T1 V2's advanced Turbo Coding feature: Rate Matching Punctured Turbo Coded Signaling over a Memoryless or Memory Single Channel along with a M-ary Modulation Scheme {M-PSK, M-PAM, M-QAM, or M-FSK where M = 4, 8, 16, 32, or 64} for the study and research of Rate Matching and Turbo Codes.

Also, a T1 V2 User can utilize the TURBO DECODING FIXED NUMBER or CROSS-ENTROPY STOPPING RULE.

LEARN about T1 V2's TURBO CODING and ITERATIVE DECODING feature via its description and its Turbo Coded Signaling over a Coherent Memoryless Channel simulated results (&BER Plots) and evaluation. And then BUY T1 Professional.

A T1 V2 User can utilize the Low-Density Parity-Check (LPDC) Codes (Gallager, Array, or Repeat-Accumulate) Construction and then LDPC Coded Signaling and Iterative Decoding (Sum-Product or Bit Flipping Algorithm) features to study the performance of sparse non-short blocklength codes.

LEARN about T1 V2's LDPC CODING and ITERATIVE DECODING feature via its description and its Gallager, Array, and Repeat-Accumulate Coded Signaling over a Coherent Memoryless Channel simulated results (& BER Plots) and evaluation; and Gallager Coded Signaling over a Rayleigh Fading Channel simulated results (& BER Plots) and evaluation. And then BUY T1 Professional.

      

BUY T1 Version 2 (ADVDCSMT1DCSS Professional software system tool)NOW.

This product is the result of intense development over a number of years after years of study of Information Theory, Digital Communication Systems, Coding Theory, Random Processes, and Signal Processing. An extremely important optimum decoding algorithm for Convolutional Codes [The Viterbi Algorithm (VA)] has been implemented in the product by an expert of this algorithm. The VA is used in cellphones and other communications devices.

Further, the VA is a Trellis Decoding Algorithm that can be used to construct a forward-backward soft-output (SO) algorithm (involves a forward VA recursion & a backward VA recursion), i.e., the 'Symbol-by-Symbol' MAP algorithm. This MAP algorithm is used in the Iterative Soft-Input (SI) SO channel decoder, the famous Turbo Decoder.

And this Turbo Decoder (Iterative SISO Channel decoder) using this MAP algorithm has been added to T1 V2.

So if you really want to use/learn/evaluate the Viterbi Algorithm, BUY & USE T1. It works... check out this website for details.

And if you want to use/learn/evaluate the 'Symbol-by-Symbol' MAP algorithm, BUY & USE T1 Professional.

And if you want to use/learn/evaluate the TURBO DECODING algorithm, BUY & USE T1 Professional.

And if you want to use/learn/evaluate the SUM-PRODUCT DECODING algorithm, BUY & USE T1 Professional.

Check out this product; and if you have any questions about it; or if you have any problems with Ordering this product, Please email me at darrell@noltasssoft.com and I will respond to you as soon as possible.