comm.DQPSKDemodulator
Demodulate using DQPSK method
Description
The DQPSKDemodulator
object demodulates a signal that was
modulated using the differential quadrature phase shift keying method. The input is a baseband
representation of the modulated signal.
To demodulate a signal that was modulated using differential quadrature phase shift keying:
Define and set up your DQPSK modulator object. See Construction.
Call
step
to demodulate a signal according to the properties ofDQPSKDemodulator
. 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.DQPSKDemodulator
creates a demodulator System object, H
.
This object demodulates the input signal using the differential quadrature
phase shift keying (DQPSK) method.
H = comm.DQPSKDemodulator(
creates
a DQPSK demodulator 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.DQPSKDemodulator(PHASE,
creates
a DQPSK demodulator 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. The default
is |
|
Output data as bits Specify whether the output consists of groups of bits or integer
symbol values. The default is |
|
Constellation encoding Specify how the object maps an integer or group of 2 bits to the corresponding symbol as one
of |
|
Data type of output Specify the output data type as one of |
Methods
step | Demodulate using DQPSK method |
Examples
Algorithms
This object implements the algorithm, inputs, and outputs described on the DQPSK Demodulator Baseband block reference page. The object properties correspond to the block parameters.