ST-135 Datasheet, PDF (1/1 Pages) Filtronic Compound Semiconductors – Software Radio Demodulator for demodulating diverse signals

www.sigtek.com
ST-135
Features
• Demodulates BPSK,
DBPSK, QPSK, DQPSK,
OQPSK, MSK, and FSK
• PSK symbol rates from
1.2 kS/s to 16 MS/s
• FSK symbol rates from
1.2 kS/s to 500 kS/s
• Phase estimator assisted
TDMA burst acquisition
• Tuning resolution of 1 Hz
• Java^TM remote control over
TCP/IP interface
• NT device drivers
(Solaris^TM drivers optional)
• TDM, TDMA, Push-to-Talk,
SCPC
• Matched filter CDMA
spread spectrum RX (opt.)
• FEC decoder (opt.)
Software Radio Demodulator
for demodulating diverse signals
A member of Filtronic Sigtek’s high performance VME software radio family, the
ST-135 high performance software radio demodulates a growing set of signals
including BPSK, DBPSK, QPSK, DQPSK, FSK and MSK. Bit rates from 1.2 Kbps
to 32 Mbps with future growth to 40 Mbps and beyond. The expandable software
radio architecture allows addition and enhancement of demodulation types.
Control software includes a Java^TM control application for TCP/IP remote
operation and NT device drivers. Options include a direct sequence CDMA
spread spectrum receiver and FEC decoder.
ST-135 Software Radio Block Diagram
Analog
IF
Analog
Tuner/ADC
Digital Down
Converter
CDMA
Despread
(optional)
I
Q
Digital
Demod
Bit
Mapper
FEC
Capture
(optional)
I and Q
Capture
Soft
Decisions
ST-135 VME Card
Carrier
NCO
Symbol
NCO
Double width VME: 6U x 160mm
Ordering Information
ST-135-xxx Burst Demod
-000 : Analog input
-ECL : ECL input
-DMF : CDMA option
-FEC : FEC option
*Chassis are available upon request
INPUT
IF:
Level:
External Reference:
Connector:
120 to 200 MHz 45 to 95 MHz (optional)
-10 to -60 dBm
10 MHz
SMA, 50 ohm
OUTPUT
Soft decision bits:
X-Y constellation:
RS-422 and VME P2
SMA, high impedance scope
DEMODULATION
Signals:
Rates:
Burst acquisition:
Carrier error tracking:
BPSK, DBPSK, QPSK, DQPSK, FSK, and MSK
PSK from 1.2 kS/s to 16 MS/s
FSK from 1.2 kS/s to 500 kS/s
Phase estimator assisted
5% of symbol rate
FEC Decoder/Capture (optional)
Viterbi FEC:
Capture buffer:
1/2, 3/4, and 7/8 with constraint length 7
2 Msamples x 16-bit I and Q
Direct Sequence CDMA Spread Spectrum Receiver (optional)
Signals:
BPSK and QPSK
Chip rates:
1 MHz to 16 MHz
Sequence Length:
2⁴ to 2²¹ (SRAM loadable)
Acquisition:
1024 length, matched filter assisted,
serial despreader
9075 Guilford Road, C-1 • Columbia, MD 21046 • 410-290-3918 • 410-290-8146 fax
001-0135-700 Rev. 1