鈥?/div>
FEC decoder (opt.)
ST-135
Software Radio Demodulator
for demodulating diverse signals
A member of Filtronic Sigtek鈥檚 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
CDMA
Despread
(optional)
Analog
IF
FEC
Capture
(optional)
I and Q
Capture
Analog
Tuner/ADC
Digital Down
Converter
I
Q
Digital
Demod
Bit
Mapper
Soft
Decisions
ST-135 VME Card
Carrier
NCO
Symbol
NCO
INPUT
IF:
Level:
External Reference:
Connector:
120 to 200 MHz 45 to 95 MHz (optional)
-10 to -60 dBm
10 MHz
SMA, 50 ohm
RS-422 and VME P2
SMA, high impedance scope
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
1/2, 3/4, and 7/8 with constraint length 7
2 Msamples x 16-bit I and Q
BPSK and QPSK
1 MHz to 16 MHz
2
4
to 2
21
(SRAM loadable)
1024 length, matched filter assisted,
serial despreader
001-0135-700 Rev. 1
OUTPUT
Soft decision bits:
X-Y constellation:
DEMODULATION
Signals:
Rates:
Burst acquisition:
Carrier error tracking:
Double width VME: 6U x 160mm
FEC Decoder/Capture (optional)
Viterbi FEC:
Capture buffer:
Signals:
Chip rates:
Sequence Length:
Acquisition:
Ordering Information
ST-135-xxx Burst Demod
-000 : Analog input
-ECL : ECL input
-DMF : CDMA option
-FEC : FEC option
*Chassis are available upon request
Direct Sequence CDMA Spread Spectrum Receiver (optional)
9075 Guilford Road, C-1 鈥?Columbia, MD 21046 鈥?410-290-3918 鈥?410-290-8146 fax
1
