DBPSK Modulator Baseband

Modulation using the DBPSK method.

blockType: DBPSKModulatorBaseband

Path in the library:

/Communication Systems/Modulation/Digital Modulation/PM/DBPSK Modulator Baseband

Description

The DBPSK Modulator Baseband block modulates signals by differential binary phase shift keying (DBPSK) and returns a wideband modulated signal. For details, refer to Algorithms.

Ports

Input

# IN_1 — input signal
scalar | vector

Details

An input signal specified as a scalar or vector with element values 0 or 1.

Data types: double, single, int8, int16, int32, uint8, uint16, uint32, Boolean

Data types	`Float64` \| `Single` \| `Int8` \| `Int16` \| `Int32` \| `Uint8` \| `Uint16` \| `Uint32` \| `Boolean`
Complex numbers support	No

Output

# OUT_1 — DBPSK modulated broadband signal
scalar | vector

Details

DBPSK-modulated baseband signal returned as a complex scalar or column vector.

Data types	`Float64` \| `Single`.
Complex numbers support	Yes

Parameters

Main

# Phase rotation (rad) — additional phase shift
Real number

Details

Additional phase shift in radians between the previous and current modulated symbols, specified as a scalar. This value corresponds to the phase difference between the previous and current modulated symbols when the input is zero.

Example: pi/4

Default value	`0`
Program usage name	`PhaseRotation`
Tunable	No
Evaluatable	Yes

# Output data type — output data type
ComplexF64 | ComplexF32

Details

The output data type specified as ComplexF64 or ComplexF32.

Values	`ComplexF64` \| `ComplexF32`
Default value	`ComplexF64`
Program usage name	`OutputDataType`
Tunable	No
Evaluatable	No

Optional

*Supported data types

Port

Supported data types

Input

Double-precision floating point
Single-precision floating point
Boolean
8-, 16-, and 32-bit signed integers
8-, 16-, and 32-bit unsigned integers

Output

Double-precision floating point
Single-precision floating point

* Algorithms *

To rotate the phase by radians, the DBPSK modulation method obeys the following rules:

If the first input bit is 0 or 1, the first modulated symbol is or respectively.
If the subsequent input bit is 0 or 1, then the modulated symbol is the previous modulated symbol multiplied by or respectively.

- phase rotation parameter value (rad).