New release of MULTIPSK (4.37)

RX/TX:  PSK10 / BPSK31-63-125-250 / QPSK31-63-125-250 / CHIP (64/128) / PSKFEC31 / PSKAM10-31-50 / PSK63F - PSK220F + DIGISSTV "Run" / DTMF / CW / NDB / CCW / CCW-FSK / QRSS / THROB / THROBX / DTMF / MFSK8 / MFSK16/32/64 (+ SSTV) / MIL-STD-188-141A / ARQ FAE  / MIL-STD-188-110A / ALE400 / OLIVIA / CONTESTIA / RTTYM / VOICE / JT65 / DominoF DF / DominoEX / THOR / MT63 / RTTY 45 / 75 / RTTY 50+SYNOP+SHIP / ASCII / AMTOR FEC / PACKET FSK 110-300-1200 + APRS+ DIGISSTV "Run" / PACKET BPSK1200-250-63 / PACTOR 1-FEC / PAX+PAX2 + APRS / FELD HELL / PSK HELL / FM HELL (105-245) / HELL 80 / HF-FAX / SSTV / LENTUS / AUTEX
RX only:  AMTOR ARQ / NAVTEX / RTTY 100 to 200 / 1382 / GMDSS DSC / ATIS /ACARS (VHF) / DGPS / SELCAL / COQUELET / NWR SAME / STANAG 4285 / HFDL / IEC 870-5 / ARQ-E / ARQ-E3 / POCSAG / BIIS / AIS / RDS / EPIRB-ELT-PLB beacons / Packet 9600 bauds (G3RUH) / VDL2 / ARGOS / Mode S (ADS-B) / ORBCOMM / AERO / EGC / M10 / RS41 / DFM06-09
DSP: Filters + CW binaural reception
Identifiers: Video ID, RS ID, Call ID
PSK Panoramic (BPSK31/BPSK63/PSKFEC31):  RX 23 or 36 channels simultaneously
CW Panoramic:  RX 8, 23 or 36 channels simultaneously
RTTY Panoramic:  RX 8 or 12 RTTY QSO decoded simultaneously on 22 or 35 channels
Programmation of Multipsk reception
Satellites tracking
TCP/IP digital modem 
Integered SDR demodulator/modulator
SDR TCP/IP interface
SDR spectrum

CLOCK 1.11.5 (FRANCE-INTER, DCF77, HBG, MSF, WWVB, WWV, WWVH, CHU, JJY, RAI, BBC, GPS, Internet)
MULTIDEM 2.5.1 SSB/AM/FM/CW/digital modulator/demodulator for DSB and SdR transceivers + demodulation of broadcast FM

Pour les francophones: la version en franηais de ce message se trouve sur mon site (http://f6cte.free.fr). Il suffit de cliquer sur le lien "Principales modifications (courriel avertissant de la sortie de la nouvelle version)".

Hello to all Ham and SWL,

The new release of MultiPSK (4.37) is on my Web site (http://f6cte.free.fr). 
The mirror site is Earl's, N8KBR: https://www.paazig.net/f6cte/MULTIPSK_setup.exe
The MD5 signature of the downloaded MULTIPSK_setup.exe file to, possibly, check (with WinMD5 for example), that the downloading works without error, is equal to: 8b9669cf7cfda8abb14b53490dc309ee
Multipsk associated to Clock are freeware programs but with functions submitted to a licence (by user key).

The main improvements of MULTIPSK 4.37 are the following:

DFM06-09 radiosondes decoding

The DFM06 radiosonde is in service since 2006 and the DFM09 one since 2011. It equips the weather balloons used in meteorology. It is a small box of 90 g, equiped with sensors, a GPS receiver (for its position) and a transmitter for data transmission, this one being done according to a mode poorly documented. It is possible to monitor these radiosondes up to a range of 600 km, according to the reception equipment, whereas the weather balloons can travel up to 300 km, in general. It has to be noted that the balloons launches are generally done at fixed time. One or two launches are done each day.

For Hams and SWL, the DFM06-09 signal (from can be received:
	either from the discriminator output of a classical UHF FM receiver via a direct connection to the PC sound card. However, the receiver must have a large reception bandwidth due to the high modulation speed,
	or with a SdR receiver (FunCube Dongle, RTL SDR,...) and directly demodulated by Multipsk. It is the most simple solution.

The main launch site of balloons with DFM06-09 radiosondes is Beauvechain in Belgium (frequencies from 402.870 to 404.710 MHz).

Note: Multipsk decodes the radiosonde position but not the atmospheric measurements (temperature, pressure etc).

This mode is available for licencied copies, only (otherwise, the decoding is stopped after 5 minutes). 

See general specifications further on.


Other improvements:

	Addition of the distance between the radiosonde (M10, RS41, DFM06-09) and the station monitoring.

	In HFDL, a bug relative to the weather messages decoding (METAR, SPECIF, TAF) has been fixed.

	In SELCAL, improvement of the received callsigns management (in the Combo box).

	In MFSK32 and MFSK64, a bug relative to the SSTV pictures decoding has been fixed.


Note about translation of Multipsk.exe and Clock .exe:  the 4.36 version of Multipsk has been translated to Spanish by Joachin (EA4ZB), from French. 
See: http://f6cte.free.fr/Translation_files.htm. 

73
Patrick

Description of the DFM06-09 mode

Baud rate: 2500 symbols/second.

Modulation : FSK. Each binary symbol is based on a double-bit. The coding used is the "(differential) Manchester": a double-bit "10" expresses a "1", a double-bit "01" expresses a "0" and the double-bits "11" and "00" are undetermined.

Reception mode: FM

Bandwidth : about 8 KHz (but about 2 KHz in base band after FM demodulation)

Demodulation : not coherent

Synchronization for bits: automatic using the signal,

Detection code: yes on 32 bits (synchronization block), testing both polarities

Interleaving : yes (on the 528 bits following the 32 bits of the synchronization block)

Correction code: extended Hamming (8,4) (on the 528 bits following the 32 bits of the synchronization block)

Scrambling: no

The frame contains 560 bits shared in different blocks:

	a block of 32 bits "Synchronization" (01100101011001101010010110101010),

	And after deinterleaving and Hamming decoding:

	a block of 28 configuration symbols (containing also temperature, not decoded by Multipsk),
	a first block of 52 data symbols (containing time, date, position....),
	a second block of 52 data symbols (containing time, date, position....).
