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HamSphere

From Wikipedia, the free encyclopedia

HamSphere working on Windows 7.

HamSphere is a software Amateur Radio simulator that allows licensed radio amateurs and unlicensed enthusiasts to communicate with one another using a simulated ionosphere. It was designed by Kelly Lindman, a radio amateur withcallsign 5B4AIT.

The system allows realistic worldwide connections between amateur radio operators as well as radio enthusiasts. In general it is similar to other VoIP applications (such as Skype), but with the unique addition of characteristics such as channel selection by tuning, modulation, noise effects and shortwave propagation simulation.

Before using the system it is necessary for a radio amateur's callsign to be validated. The HamSphere system relies on different amateur online callbooks for verification before his or her callsign is added to the list of validated users.

The system may be used without a verified radio amateur license and has a callsign generator providing unique unofficial HamSphere callsigns.

The software is written to run on Microsoft Windows, Apple or Linux using Java. There is another edition of the software running on Apple mobile devices (iPhone, iPod touch, and iPad), and is available as beta on request.

HamSphere on windows7

Uses

Operators using the HamSphere software can operate it in two modes:

• Simulation mode. This is the unique feature of HamSphere allowing the user to maintain connections under natural realistic conditions. Signals may vary and interference is present giving the user the impression that he or she is using a real shortwave transceiver.
• Simulation off mode. This mode entails connection to other operators with the reliability of VoIP (noise-free) while maintaining the other typical characteristics of radio communication.

[edit]Operating modes

The HamSphere software has two modulation types:

• Double-sideband suppressed-carrier transmission or DSB is the default mode of operation where the operator uses speech audio/phone.
• Continuous wave or CW where the operator utilizes a built-in Morse Code keyer.

[edit]Propagation model

The mathematical algorithm for the wave propagation is based on a stochastic model and pre recorded signal envelope. Multipath propagation is achieved by inducing multiple simulated electromagnetic paths digitally thus producing signal fading and audio distortion.

[edit]Detector and Filters

Signals are received and converted into audible form by using a product detector mixing the local oscillator signal with the received signal, very similar toSoftware-defined radio. The digital artifact of the decoded audio signal is later filtered with a 17-order FIR filter with a bandwidth of 2.8 kHz.

See also

• EchoLink I did
• eQSO I did
• Internet Radio Linking Project I can listen 
• Radio over IP
• Wide-Coverage Internet Repeater Enhancement System

QSO style 

HamSphere iPhone

HamSphere iPhone infomation

I already QSO on 40m Band by iPhone

    6K2BEK yoon san Thank you very much 1st ever QSO 73's

HamSphere Android phone

Nice nice niceeee!!! very nice style and spec...

I used this software ..How Easy!!! and near true QSO...  

Please try it .. Easy and Clearly ..and no Rig and Antenna  hi hi  : )