comm.DQPSKModulator
Modulate using DQPSK method
Description
TheDQPSKModulator
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. SeeConstruction.
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 thestep
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)
andy = 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 thePhaseRotation
property set toPHASE
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 |
|
星座编码 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 theDQPSK Modulator Basebandblock reference page. The object properties correspond to the block parameters.