HPSDR
Encyclopedia
The HPSDR project dates from 2005 when Phil Covington, Phil Harman, and Bill Tracey combined their separate projects to form the HPSDR group. It is built around a modular concept which encourages experimentation with new techniques and devices (e.g. SDR
, Envelope Elimination and Restoration) without the need to replace the entire set of boards. The project has expanded from the original group, and several additional people have been involved in recent HPSDR module designs.
The core modules of the project are the Atlas passive backplane, the Ozy interface which provides a USB 2.0 data channel between the HPSDR system and the host PC, and the Mercury and Penelope receiver and exciter boards, which use high speed analogue to digital/digital to analogue converters for direct conversion of received or transmitted signals in the DC to 55 MHz frequency range.
Mercury has attracted wide interest within the HPSDR community as a general-coverage, high performance, HF receiver. It uses a 16-bit 135MSPS analog-to-digital converter that provides performance over the range 0 to 55 MHz comparable to that of a conventional analogue HF radio. The receiver will also operate in the VHF and UHF range using either mixer image or alias responses. The host computer uses DSP techniques to process the digital bitstream it receives from the HPSDR system. Currently, the HPSDR hardware has been interfaced with the Flex-Radio PowerSDR Windows-based software, which is licensed under the GPL.
As of February, 2011, the following HPSDR modules have been released:
Other modules nearing release include:
Replaced by newer modules:
In cooperation with the HPSDR group, TAPR
has provided (or will provide) all the modules listed above. Most have been made available as either fully assembled units or as bare circuit boards; a few are available as kits of parts.
Several other modules are under development. A web site and Wiki provide further information about the HPSDR projects.
.
The HPSDR project is open-source for software and uses a combination of licenses for the hardware..
Software-defined radio
A software-defined radio system, or SDR, is a radio communication system where components that have been typically implemented in hardware are instead implemented by means of software on a personal computer or embedded computing devices...
, Envelope Elimination and Restoration) without the need to replace the entire set of boards. The project has expanded from the original group, and several additional people have been involved in recent HPSDR module designs.
The core modules of the project are the Atlas passive backplane, the Ozy interface which provides a USB 2.0 data channel between the HPSDR system and the host PC, and the Mercury and Penelope receiver and exciter boards, which use high speed analogue to digital/digital to analogue converters for direct conversion of received or transmitted signals in the DC to 55 MHz frequency range.
Mercury has attracted wide interest within the HPSDR community as a general-coverage, high performance, HF receiver. It uses a 16-bit 135MSPS analog-to-digital converter that provides performance over the range 0 to 55 MHz comparable to that of a conventional analogue HF radio. The receiver will also operate in the VHF and UHF range using either mixer image or alias responses. The host computer uses DSP techniques to process the digital bitstream it receives from the HPSDR system. Currently, the HPSDR hardware has been interfaced with the Flex-Radio PowerSDR Windows-based software, which is licensed under the GPL.
As of February, 2011, the following HPSDR modules have been released:
- Atlas backplane
- Magister control board
- Janus I/Q interface board
- Mercury Direct Down-conversion receiver
- LPU linear power supply
- Pandora enclosure
- Excalibur frequency reference board
- PennyWhistle 20 watt RF power amplifier
- Hercules 100 watt RF power amplifier
- Metis 1Gigbit (1000T) PC interface board
Other modules nearing release include:
- Alex RX/TX filter bank
Replaced by newer modules:
- Ozy USB control board (replaced by Magister)
- Penelope Direct Up-conversion exciter (replaced by PennyLane, not provided by TAPR but by new commercial organisation)
In cooperation with the HPSDR group, TAPR
TAPR
TAPR can mean:*Tucson Amateur Packet Radio*TAPR Open Hardware License...
has provided (or will provide) all the modules listed above. Most have been made available as either fully assembled units or as bare circuit boards; a few are available as kits of parts.
Several other modules are under development. A web site and Wiki provide further information about the HPSDR projects.
.
The HPSDR project is open-source for software and uses a combination of licenses for the hardware..
See also
- Universal Software Radio PeripheralUniversal Software Radio PeripheralThe Universal Software Radio Peripheral products are a family of computer-hosted hardware offered by Ettus Research LLC and its parent company, National Instruments, for making software radios. The USRP product is intended to be a comparatively inexpensive hardware device for software radio...
- Software-defined radioSoftware-defined radioA software-defined radio system, or SDR, is a radio communication system where components that have been typically implemented in hardware are instead implemented by means of software on a personal computer or embedded computing devices...
- Digital radioDigital radioDigital radio has several meanings:1. Today the most common meaning is digital radio broadcasting technologies, such as the digital audio broadcasting system, also known as Eureka 147. In these systems, the analog audio signal is digitized into zeros and ones, compressed using formats such as...
- PACTORPACTORPACTOR is a radio modulation mode used by amateur radio operators, marine radio stations, and radio stations in isolated areas to send and receive digital information via radio. A robust network of PACTOR stations has been established to relay data between radio stations and the Internet,...
- AMTORAMTORAMTOR is a type of telecommunications system that consists of two or more electromechanical teleprinters in different locations that send and receive messages to one another. AMTOR is a specialized form of RTTY protocol...