comm.DQPSKModulator
Modulate using DQPSK method
Description
The DQPSKModulator
object modulates using the differential
quadrature phase shift keying method. The output is a baseband representation of the modulated
signal.
To modulate a signal using differential quadrature phase shift keying:
Define and set up your DQPSK modulator object. See Construction.
Call
step
to modulate a signal according to the properties ofcomm.DQPSKModulator
. The behavior ofstep
is specific to each object in the toolbox.
Note
Starting in R2016b, instead of using the step
method
to perform the operation defined by the System object™, you can
call the object with arguments, as if it were a function. For example, y
= step(obj,x)
and y = obj(x)
perform
equivalent operations.
Construction
H = comm.DQPSKModulator
creates a modulator System object, H
.
This object modulates the input signal using the differential quadrature
phase shift keying (DQPSK) method.
H = comm.DQPSKModulator(
creates
a DQPSK modulator object, Name
,Value
)H
, with each specified
property set to the specified value. You can specify additional name-value
pair arguments in any order as (Name1
,Value1
,...,NameN
,ValueN
).
H = comm.DQPSKModulator(PHASE,
creates
a DQPSK modulator object, Name
,Value
)H
. This object has
the PhaseRotation
property set to PHASE
and
the other specified properties set to the specified values.
Properties
|
Additional phase shift Specify the additional phase difference between previous and
current modulated symbols in radians as a real scalar value. The
default is |
|
Assume bit inputs Specify whether the input is bits or integers. The default
is |
|
Constellation encoding Specify how the object maps an integer or group of two input bits to the corresponding symbol
as one of |
|
Data type of output Specify output data type as one of |
Methods
step | Modulate using DQPSK method |
Examples
Algorithms
This object implements the algorithm, inputs, and outputs described on the DQPSK Modulator Baseband block reference page. The object properties correspond to the block parameters.