Add Linrad

[dslotter]

Add Linrad from http://www.sm5bsz.com/linuxdsp/linrad.htm

Description: Linrad is a free multi-OS computer program. It is free for anyone for any purpose. Copyright laws are complicated and to make sure I will not change my mind and claim copyright Linrad comes with the MIT license starting with version 03-45. By granting a very permissive license to anyone who has obtained a copy of Linrad there should be no doubt that the freedom to use linrad or parts of the code for any purpose will remain for ever.

Together with hardware that can bring RF signals into digital form Linrad forms an SDR receiver. (A Software Defined Radio receiver.) There is also a transmit part inside Linrad that will form an SDR transmitter together with appropriate hardware. (The transmit side is still at an early development stage.)

Linrad was originally developed under Linux (hence the name: Linux radio.) That is history now. These are the operating systems under which Linrad can be used: 32 bit Linux (from kernel 2.2.12 and up), 64 bit Linux, Windows 98 (re-compile without libusb0), Windows 2000, 32 bit Windows XP, 64 bit Windows XP, 32 bit Windows Vista, 64 bit Windows Vista, 32 bit Windows 7, 64 bit Windows 7, 32 bit PC-BSD and Mac OS X.

Linrad can operate with any soundcard for which the operating system on the PC has drive routines. Linrad has support for the following hardware that use PC soundcards: WSE converters, Si570 (Softrock, IQ+ and others) and the Soft66 series.

Linrad can also operate with the following direct sampling receivers: SDR-14 from Rfspace, SDR-IQ from Rfspace, Perseus HF Receiver from Microtelecom s.r.l., SDR-IP from Rfspace, Excalibur (G31DDC) from Winradio. Excalibur can only be used under Windows, all other hardware work with Linrad under Linux as well as under Windows

The Linrad dsp software processes any bandwidth that the hardware can handle. Linrad has its origin in software that was developed for 144 MHz EME CW but it is quite general and should be seen more like a kit for designing a receiver that a receiver for some particular usage. To get an idea about different usages, have a look at examples of different usages of Linrad

The Linrad development page has links showing various aspects of Linrad as encountered chronologically during the development work on the Linrad receiver. Old versions can be downloaded from there. The link contains information about the difference between versions and shows how different functions are gradually added to the package. The development page contains information about the different functions as they were added and may be more complete than the more systematic presentation here.

Starting with version 02-36 Linrad also has a transmitter albeit in a very early development stage. The Linrad TX development page and the links there will show in chronological order how the development on the transmit side proceeds.