# CIS OFDM HDR Modem

From Signal Identification Wiki

**Russian OFDMOrthogonal Frequency-Division Multiplexing HDR (High Data Rate) Modem**. Has three main modes: CISCommonwealth of Independent States (CIS), the former Soviet Republic-45, CISCommonwealth of Independent States (CIS), the former Soviet Republic-60, and CISCommonwealth of Independent States (CIS), the former Soviet Republic-93, corresponding to the number of OFDMOrthogonal Frequency-Division Multiplexing tones in the signal. For all three modes, there is a carrier located 3300 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). from the suppressed carrier. In addition, all three modes utilize PSKPhase-Shift Keying OFDMOrthogonal Frequency-Division Multiplexing Modulation.

## CISCommonwealth of Independent States (CIS), the former Soviet Republic-45[edit]

- 45 Tones
- 2950 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Bandwidth
- 40 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. (1800 bpsBits per second (bps)), 33.33 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. (1500 bpsBits per second (bps))
- BPSKBinary Phase-Shift Keying (1 bit per symbol)

### Samples[edit]

CISCommonwealth of Independent States (CIS), the former Soviet Republic-45 1500bps | CISCommonwealth of Independent States (CIS), the former Soviet Republic-45 1800bps |
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## CISCommonwealth of Independent States (CIS), the former Soviet Republic-60[edit]

- 60 Tones
- 2800 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Bandwidth
- 35.555 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. (2133.33 bpsBits per second (bps))
- DPSKDifferential Phase-Shift Keying-8

### Samples[edit]

CISCommonwealth of Independent States (CIS), the former Soviet Republic-60 TFC | CISCommonwealth of Independent States (CIS), the former Soviet Republic-60 IDLE |
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## CISCommonwealth of Independent States (CIS), the former Soviet Republic-93[edit]

- 93 Tones
- 3000 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). Bandwidth
- 22 BdBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. (2046 bpsBits per second (bps))
- QPSKQuadrature Phase-Shift Keying (2 bits per symbol)

### Samples[edit]

CISCommonwealth of Independent States (CIS), the former Soviet Republic-93 TFC | CISCommonwealth of Independent States (CIS), the former Soviet Republic-93 IDLE |
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## Additional Links[edit]

- Leif Dehio Russian HDR Modem. 45 / 60 / 93-TONE OFDM
- RadioScanner.RU CIS-45
- RadioScanner.RU CIS-60
- RadioScanner.RU CIS-93