Hf channel simulator software

What is the best simulation software for high frequency ac. Today, modernized wideband hf wbhf can deliver rates up to 240 kbps on a 48 khz wide channel, opening the door for hf to deliver the same level of data transmission speeds, quality and security as narrowband satcom systems. Apr 17, 20 download gmdss vhf dsc simulator for free. Vhf digital select controller gmdss simulator src funkbetriebszeugnis. In particular, it shows how to simulate the general watterson channel model, and other simplified channel models used in the quantitative testing of hf modems. The software resides on a pc compatible computer with an ega color monitor and a microsoft compatible mouse. The radar emulation simulator provides a costeffective solution for simulating targets and channel effects in an rf environment. Simulation is an essential component of any project. Ale is a feature in an hf communications radio transceiver system that enables the radio station to make contact, or initiate a circuit, between itself and another hf radio station or network of stations. Using the tapped delay line structure of narrowband watterson model, the delay power profile of the wideband hf channel model is sampled into discrete points, dividing each propagation path into series of subpaths. The use of a channel simulator permits comparisons to be made under identical controlled circumstances, which can be varied to represent a wide range of anticipated real world operating conditions.

Figure 3 shows two typical net throughput measurements 200 hz channel and 2 khz channel made during alpha testing using long arq sessions on an hf channel simulator across various hf channel types. Telecommunications learn by simulation, hf radio learn by simulation. Easy software update of complete device via usb stick or cd. Using the tapped delay line structure of narrowband watterson mo. On the design of a voiceband hf replay channel simulator. Hf communications systems represent a viable solution to support special applications services, like those in military tactics or those needed in emergency situations. In ads 2009 update 1, 8b10b encoding constraints are not applied in the statistical analysis of the channel simulator. It is suitable for the performance evaluation of milstd188110b modem and milstd188141c automatic link establishment ale solutions.

Free rf simulation software electrical engineering stack. Realtime software simulation of the hf radio channel. The first is the hf channel simulator developed by r lugannani and hg booker under contract with computer sciences corp ref 2,3. Thetransferfunction is thebasicinputto the hardware simulator. A rake receiver is used to mitigate the effects of multipath delay. Hf data link protocol rf simulator performance based on. Implementation of a wideband highfrequency channel simulator. Although narrowband models of the hf channel have existed for many years, they. A convenient, inexpensive replacement for a damaged sound card or audio connectors, the u237001 lets you plug a microphone, speakers andor headphones into its 3. Simulator radio is a community based radio station for the simulation community. Rapidm provides embedded modems for most of the major global military radio manufacturers as well as a range of high performance standalone modems. In hf ionospheric radio communications, the transmitted signal can bounce off several times from the e and f layers of the ionosphere, which results in several propagation paths, also called modes 1.

The watterson gaussianscatter hf ionospheric channel model watterson et al, using wideband hf emissions over a path between bolder, co. Antenna and electromagnetic simulation software for. Software implementation ofa wideband hf channel transfer. Realtime hf channel simulator is hardwaresoftware implementation based on dsp technology with controlling from pc. A lowcost hf channel simulator for testing and evaluating hf digital sytems johan b. This model, known as the watterson gaussianscatter hf ionospheric. Realtime software simulation of the hf radio channel ieee. The rs8 is fully controllable via the front panel standalone unit or remotely via a pc gui using the rap1ripc protocol. A realtime software simulator of wideband hf high frequency channel model is presented. What do hobbyists use if they have a desireneed to simulate a pcb antenna for say sub 1ghz frequencies. Hf channel simulator for wideband signals deviative. Design and implementation of a wideband hf channel simulator. The simulation capability is called hicirf, for highfrequency channel impulse response function. In this paper we describe the design features and performance of one such simulator, based on the floating.

It processes voice band analog signal between output of any hf modem modulator and input of hf modem demodulator. By accurately duplicating the motion effects and rf channel physics effects on an rf link, the t400cs simulator generator allows bench testing of what once required actual motion and distance between a transmitter and receiver. Fdtd antenna simulator is a complete software package for antenna analysis and design using the fdtd method. Users have access to 247 support for facilitating validation of new product releases and verifing the performance of designs following implementation of new features prior to. Commercial offtheshelf hardware for those processes implemented in hardware, it was determined that all but one could be. Pathwave ads offers marketleading circuit design and simulation software with integrated design guidance via templates to help you get started faster. In this simulator, the channel simulation for the multipath hf ionospheric sky wave ran dom channel is based on the most general the ory of hf wave propagation in the real fluctu ating. It may be preferable that hf ionospheric channel simulators be capable of simulating the following channel parameters.

Abstract a mathematical model of the wideband hf channel has been developed and a software version of the model presented. This is an internal hf model, where the entire highperformance shortwave receiver is contained on a pci card, extremely well shielded against the effects of pcgenerated interference. Richard and sue buckner teamed with joe ahlgren author of geoclock and steve biro to create a dynamic system simulation and visualization software package which uses the voacap propagation prediction engine to create animated maps and charts to help all users of hf radio choose the best times and frequencies for communications. Feb 01, 2005 read hf propagation in a wideband ionospheric fluctuating reflection channel. If statistical simulations are performed on channels with 8b10b encoder, results will be identical to those without encoder. The performance of ds system under hf channel and noise are also. A lowcost hf channel simulator for testing and evaluating hf. Contest program for ham radio contesting events, list of contest software category is a curation of 68 web resources on, vhfctest4win, minos, tlf contest log.

Array simulator defense technical information center. It allows the proof of feasibility of any design before the components are purchased to build prototypes. Aug 29, 2016 download fdtd antenna simulator for free. A useful simulation thus must not only generate valid results, but must generate those results in much less than real time. It simulates rf part of transmitter, ionosphere channel and rf part of receiver. Using the tapped delay line structure of narrowband watterson model, the delay power profile of the. Antenna magus is a software tool for the acceleration of the antenna design and modeling process.

The inputs are the basic physical quantities that characterize the ionosphere height, thickness, and maximum electron. Just like websdr, it enables sdr hf receivers to be operated remotely over the web. A wideband high frequency hf channel simulator is implemented in a software simulation of a directsequence spreadspectrum dsss hf communication system. Implementation of a wideband highfrequency channel. The simulation consists of a software simulation of a directsequence spreadspectrum dsss hf system with rake receiver. The second is the adaptive equalizer and mlse simulator software for narrowband signals, developed by nosc ref 4. Hf propagation in a wideband ionospheric fluctuating. Realtime software simulation of the hf radio channel ieee xplore. Forrer, kc7ww objective the incentive and justification for this project was inspired by the authors desire to develop hf digital. As used in many sea schools and colleges to teach the src radio course. Today, modernized wideband hf wbhf can deliver rates up to 240 kbps on a 48 khz wide channel, opening the door for hf to deliver the same level of data. Software implementation of a wideband hf channel transferfunction david a.

A lowcost hf channel simulator for testing and evaluating. The improved hf data network simulator ins software is designed to be a tool that can be used to determine the probable effects of various parameters on the performance of a given hf communications network. Rfsim99 is a freeware rf simulation software utility. This model, known as the watterson gaussianscatter hf ionospheric channel model, assumes that the hf channel is nonstationary in both frequency and time, but considered over small bandwidths 40 khz. The validity of the hf channel simulator is demonstrated by the analysis of the scattering function and example results of the simulator. Youve reached the support page for arrls circuit simulation and analysis by dr saeid moslehpour as explained in chapter 1 of the book, several different packages of the cadence design systems design and analysis software are available and were used in preparation of this book. Using the tapped delay line structure of narrowband watterson model, the delay power profile of the wideband hf channel model is sampled into discrete points, dividing each propagation path into series of. The system can be controlled via a standalone graphical user interface for simplified scenario applications, a dedicated realtime interface, or remotely via the ethernet interface. In particular, it shows how to simulate the general watterson channel model, and other simplified channel models used in the quantitative testing of hf. The radio definition of hf in the context of vlf, lf, hf, vhf, uhf is 330 mhz and for that spice works just fine. With the proliferation of personal computers and affordable even free software, antenna modeling has become a popular amateur activity. Simulation software to learn and practise calling and emergency procedures of the marine vhf radio and prepare your short range certificate src. Ansys hfss is a 3d electromagnetic em simulation software for designing and simulating highfrequency electronic products such as antennas, antenna arrays, rf or microwave components, highspeed interconnects, filters, connectors, ic packages and printed circuit boards. Besides all the advantages, the hf channel has its own limitations and challenges.

The near replica gmdss version and the software gmdss version simulate both the same equipment, the difference is in the realism of the hardware version and especially in having three independent audio channels, radio vhf, mf hf radio and satellite b, while the software version has a single shared audio channel. Creating world class digital radio technology, delivering unsurpassed data speed, voice clarity and reach, well beyond the line of sight. This example shows how to simulate highfrequency hf ionospheric channels, based on the models described in recommendation itur f. Rockwell collins hsm2050 hf vhfuhf highspeed modem hsm2050 hf vhfuhf highspeed modem 8222592001 overview for fast, reliable data, count on the hsm2050 is the latest generation hf vhfuhf rf modem from rockwell collins. Horizon radar othr and hf communication system design studies and test planning.

Realtime hf channel simulator realtime hf channel simulator is hardware software implementation based on dsp technology with controlling from pc. An example of a packaging problem solving using hf works. The validity of the hf channel simulator has been demonstrated by the analysis of inout signals of the channel simulator. This model forms the basis for most modern hf channel simulation work and often are used for both software and hardware channel simulation. This annex deals with the question of parameters to be specified when using hf ionospheric channel simulators to evaluate equipment intended for operation over hf radio circuits.

Hfworks solves electromagnetic radiation, electromagnetic waves, electromagnetic propagation, electromagnetic interference emi, electromagnetic compatibility emc, and. The simulator provides documentation on gmdss theory based on the imo gmdss handbook, software models of typical ships gmdss radio equipment based on skanti series and an assessment program to test student knowledge. Ace hf system simulation and visualization software, v2. In this paper we describe the design features and performance of one such simulator, based on the floating point systems ap120b array processor. Pass your gmdss vhf short range certificate with this ryaapproved dsc radio training simulator. Physically based software simulator of the channel, radio science on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Improved hf data network simulator, software users. In this paper we describe the design features and performance of.

While the previous post still holds some extremely valuable information, a lot has changed in 3 years. Pdf a highfidelity hf channel simulation has been developed that is suitable for. Feb 04, 2020 back in 2016, we wrote one of our most popular posts covering 12 popular software defined radios or sdrs. You might find their user interface ui more user friendly. The techniques were implemented and tested in a user friendly, pc based simulation called the improved hf data network simulation ins. Hoffmeyer this report describes a new and unique approach for modeling either narrowband or wideband high frequency hf channels. Several receivers can reside on a single pc to form a multi channel receiver system. The rockwell mdm3001 milstd data modem provides an hf channel simulator hfchansim mode specifically for use in testing of another mdm3001 modem in. Gmdss simulator be software maritime simulation solutions.

Acehf system simulation and visualization software, v2. This addendum augments that model by including deviative absorption loss for the skywave returns and by providing for automatic calculation of the groundwave attenuation. Enable browser cookies for improved site capabilities and performance. Thats why collins aerospace provides modernized, highfrequency hf communications systems that provide all the communications capabilities needed with very low daytoday operating costs. Hicirf provides simulated hf signals corresponding to. One of the main disadvantages is the fact that hf is defined as a multipath fading channel. The only rf and microwave design software embedded in solidworks.

The paper presents a wideband high frequency hf channel simulator. Each antenna design software is slightly different from each other as each software design some specific types of antenna. Ive been using rf sim 99 aka rfsim99 for over a decade, and its proved invaluable again and again during that time, and continues to do so. A realtime software simulator of wideband hf propagation. Hfworks is an antenna and electromagnetic simulation software for rf, microwave, mmwave, and high frequency and high speed electrical and electronics devices and circuits. It is a pcbased simulator to train seafaring people in the use of gmdss communications equipment, within a controlled and safe environment. These receiverservers make it possible for anyone to listen to ham radio online. Path loss formulae were not programmed for the hf channel as programs are generally available. Through these software, you can design various types of antennas like yagi, jpole, parabolic, quagi, super scanner, etc. It is also possible to listen to other radio broadcasting stations. A new approach to hf channel modeling and simulation, part 1.

Thisreportpresents ananalytic model implemented as the computerprogram ofthe transfer function ofa wideband hf channel model for use in a hardware simulator. The simulation capability is called hicirf, for high. Yesterday mark and i bench tested a hf radio with calibrated snr over simulated awgn and hf channels. Rapidm today offers the latest generation military standard data modems, world leading secure digital voice solutions, wideband hf technology, tactical data terminal systems and much more. We have developed a software based hf channel sim ulator that benefit s from state of practice hf channel. Realtime channel simulator dt4630 rtsim fraunhofer iis.

It depends on what you definition of high frequency. Here is a list of best free antenna design software for windows. The simulator from mercator presents a stateof theart vhf radio using both digital selective calling dsc and radiotelephony voice functions. Antenna modeling used to be the domain of scientists and engineers with very expensive antenna ranges covering acres and acres of land strewn with expensive equipment. This post describes how we implemented a hf channel simulator to bench test a digital hf radio using modern sdrs.

It is designed for carrier frequencies in the 232 mhz range and it can accommodate bandwidths up to 100 khz and ground ranges up to km. A realtime software simulator of wideband hf propagation channel. The software includes application libraries featuring a variety of antenna examples such as a microstrip patch antenna array used as transceivers of radar and rf signals. A simulator has been developed that is capable of modeling the wideband hf channel. The rapidm rs8 standalone unit can simulate hf and vuhf channel conditions for reproducible performance evaluation of modems and waveforms at baseband. Vox maris gmdss simulator free download and software. Typically, the multipath delay spreads are large, as compared to mobile radio. It is a software defined, highdata rate hf, vhf, and uhf modem intended for use in both military and commercial applications. Keysights propsim channel emulation solutions enable realistic realtime performance testing of wireless devices and base stations. Rockwell mdm3001 used as an hf channel simulator by nnn0wwl. The deterministic phase function and stochastic modulation function is applied.