调制

模拟和数字调制

使用数字基带、模拟基带和模拟通带方法对信号数据进行调制和解调。

函数

数字基带调制

振幅调制

`genqammod`	General quadrature amplitude modulation (QAM)
`genqamdemod`	General quadrature amplitude demodulation
`modnorm`	Scaling factor for normalizing modulation output
`pammod`	Pulse amplitude modulation (PAM)
`pamdemod`	Pulse amplitude demodulation
`qammod`	Quadrature amplitude modulation (QAM)
`qamdemod`	Quadrature amplitude demodulation

振幅和相位调制

`apskmod`	Amplitude phase shift keying (APSK) modulation
`apskdemod`	Amplitude phase shift keying (APSK) demodulation
`mil188qammod`	MIL-STD-188-110 B/C standard-specific quadrature amplitude modulation (QAM)
`mil188qamdemod`	MIL-STD-188-110 B/C standard-specific quadrature amplitude demodulation

连续相位调制

`mskmod`	Minimum shift keying modulation
`mskdemod`	Minimum shift keying demodulation

频率调制

`fskmod`	Frequency shift keying modulation
`fskdemod`	Frequency shift keying demodulation

OFDM 调制

`ofdmmod`	Modulate using OFDM method
`ofdmdemod`	Demodulate using OFDM method

相位调制

`dpskmod`	Differential phase shift keying modulation
`dpskdemod`	Differential phase shift keying demodulation
`pskmod`	Modulate signal using M-PSK method
`pskdemod`	Demodulate using M-ary PSK method

模拟通带调制

`ammod`	Amplitude modulation
`amdemod`	Amplitude demodulation
`fmmod`	Frequency modulation
`fmdemod`	Frequency demodulation
`pmmod`	Phase modulation
`pmdemod`	Phase demodulation
`ssbmod`	Single sideband suppressed-carrier amplitude modulation
`ssbdemod`	Single sideband amplitude demodulation

对象

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数字基带调制

振幅调制

`comm.GeneralQAMModulator`	Modulate using arbitrary QAM constellation
`comm.GeneralQAMDemodulator`	Demodulate using arbitrary QAM constellation

连续相位调制

`comm.CPFSKModulator`	Modulate using CPFSK method
`comm.CPFSKDemodulator`	Demodulate using CPFSK method and Viterbi algorithm
`comm.CPMModulator`	Modulate signal using CPM method
`comm.CPMDemodulator`	Demodulate signal using CPM method and Viterbi algorithm
`comm.GMSKModulator`	Modulate using GMSK method
`comm.GMSKDemodulator`	Demodulate GMSK-modulated signal
`comm.MSKModulator`	Modulate using MSK method
`comm.MSKDemodulator`	Demodulate using MSK method and Viterbi algorithm

频率调制

`comm.FSKModulator`	Modulate using M-ary FSK method
`comm.FSKDemodulator`	Demodulate using M-ary FSK method

OFDM 调制

`comm.OFDMModulator`	Modulate using OFDM method
`comm.OFDMDemodulator`	Demodulate using OFDM method

相位调制

`comm.DBPSKModulator`	Modulate using DBPSK method
`comm.DBPSKDemodulator`	Demodulate using DBPSK method
`comm.DPSKModulator`	Modulate using M-ary DPSK method
`comm.DPSKDemodulator`	Demodulate using M-ary DPSK method
`comm.DQPSKModulator`	Modulate using DQPSK method
`comm.DQPSKDemodulator`	Demodulate using DQPSK method
`comm.OQPSKModulator`	Modulation using OQPSK method
`comm.OQPSKDemodulator`	Demodulation using OQPSK method
`comm.gpu.PSKModulator`	Modulate signals using M-PSK method with GPU
`comm.gpu.PSKDemodulator`	Demodulate signals using M-ary PSK method with GPU

网格编码调制

`comm.GeneralQAMTCMModulator`	Encode binary data using convolutional encoder and map result to general QAM constellation
`comm.GeneralQAMTCMDemodulator`	Demodulate and decode trellis-coded general quadrature amplitude modulated signal
`comm.PSKTCMModulator`	Encode binary data using convolutional encoder and map result to M-PSK constellation
`comm.PSKTCMDemodulator`	Demodulate and decode trellis-coded M-PSK modulated signal
`comm.RectangularQAMTCMModulator`	Encode binary data using convolutional encoder and map result to rectangular QAM constellation
`comm.RectangularQAMTCMDemodulator`	Demodulate and decode trellis-coded rectangular quadrature amplitude modulated signal

模拟基带调制

`comm.FMBroadcastModulator`	Modulate broadcast FM audio signal
`comm.FMBroadcastDemodulator`	Demodulate broadcast FM audio signal
`comm.FMModulator`	Modulate signal using FM method
`comm.FMDemodulator`	Demodulate baseband FM signal

模块

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数字基带调制

振幅调制

General QAM Modulator Baseband	Modulate using quadrature amplitude modulation
General QAM Demodulator Baseband	Demodulate QAM-modulated data
M-PAM Modulator Baseband	Modulate using M-ary pulse amplitude modulation
M-PAM Demodulator Baseband	Demodulate M-PAM-modulated data
Rectangular QAM Modulator Baseband	Modulate using rectangular quadrature amplitude modulation
Rectangular QAM Demodulator Baseband	Demodulate rectangular-QAM-modulated data

振幅和相位调制

M-APSK Modulator Baseband	M-ary amplitude phase shift keying (APSK) modulation
M-APSK Demodulator Baseband	M-ary amplitude phase shift keying (APSK) demodulation
MIL-188 QAM Modulator Baseband	MIL-STD-188-110 B/C standard-specific quadrature amplitude modulation (QAM)
MIL-188 QAM Demodulator Baseband	MIL-STD-188-110 B/C standard-specific quadrature amplitude demodulation

连续相位调制

CPFSK Modulator Baseband	Modulate using continuous phase frequency shift keying method
CPFSK Demodulator Baseband	Demodulate CPFSK-modulated data
CPM Modulator Baseband	Modulate signal using CPM method
CPM Demodulator Baseband	Demodulate signal using CPM method and Viterbi algorithm
GMSK Modulator Baseband	Modulate using Gaussian minimum shift keying method
GMSK Demodulator Baseband	Demodulate GMSK-modulated data
MSK Modulator Baseband	Modulate using differentially encoded minimum shift keying method
MSK Demodulator Baseband	Demodulate differentially encoded MSK-modulated data

频率调制

M-FSK Modulator Baseband	Modulate using M-ary frequency shift keying method
M-FSK Demodulator Baseband	Demodulate FSK-modulated data

OFDM 调制

OFDM Modulator Baseband	Modulate using OFDM method
OFDM Demodulator Baseband	Demodulate using OFDM method

相位调制

BPSK Modulator Baseband	Modulate using BPSK method
BPSK Demodulator Baseband	Demodulate BPSK-modulated data
DBPSK Modulator Baseband	Modulate using differential binary phase shift keying method
DBPSK Demodulator Baseband	Demodulate DBPSK-modulated data
DQPSK Modulator Baseband	Modulate using differential quadrature phase shift keying method
DQPSK Demodulator Baseband	Demodulate DQPSK-modulated data
M-DPSK Modulator Baseband	Modulate using M-ary differential phase shift keying method
M-DPSK Demodulator Baseband	Demodulate DPSK-modulated data
M-PSK Modulator Baseband	Modulate using M-ary phase shift keying
M-PSK Demodulator Baseband	Demodulate PSK-modulated data
OQPSK Modulator Baseband	Modulate using OQPSK method
OQPSK Demodulator Baseband	Demodulation using OQPSK method
QPSK Modulator Baseband	Modulate using quadrature phase shift keying method
QPSK Demodulator Baseband	Demodulate QPSK-modulated data

网格编码调制

General TCM Encoder	Convolutionally encode binary data and map using arbitrary constellation
General TCM Decoder	Decode trellis-coded modulation data, mapped using arbitrary constellation
M-PSK TCM Encoder	Convolutionally encode binary data and modulate using PSK method
M-PSK TCM Decoder	Decode trellis-coded modulation data, modulated using PSK method
Rectangular QAM TCM Encoder	Convolutionally encode binary data and modulate using QAM method
Rectangular QAM TCM Decoder	Decode trellis-coded modulation data, modulated using QAM method

实用工具

Bipolar to Unipolar Converter	Map bipolar signal to unipolar signal in range [0, M – 1]
Unipolar to Bipolar Converter	Map unipolar signal in range [0, M – 1] to bipolar signal
Data Mapper	Map integer symbols from one coding scheme to another
Bit to Integer Converter	Map vector of bits to corresponding vector of integers
Integer to Bit Converter	Map vector of integers to vector of bits

模拟基带调制

FM Broadcast Modulator Baseband	Modulate using broadcast FM method
FM Broadcast Demodulator Baseband	Demodulate broadcast FM-modulated signal
FM Modulator Baseband	Modulate using FM method
FM Demodulator Baseband	Demodulate using FM method

模拟通带调制

DSB AM Modulator Passband	Modulate using double-sideband amplitude modulation
DSB AM Demodulator Passband	Demodulate DSB-AM-modulated data
DSBSC AM Modulator Passband	Modulate using double-sideband suppressed-carrier amplitude modulation
DSBSC AM Demodulator Passband	Demodulate DSBSC-AM-modulated data
FM Modulator Passband	Modulate using frequency modulation
FM Demodulator Passband	Demodulate FM-modulated data
PM Modulator Passband	Modulate using phase modulation
PM Demodulator Passband	Demodulate PM-modulated data
SSB AM Modulator Passband	Modulate using single-sideband amplitude modulation
SSB AM Demodulator Passband	Demodulate SSB-AM-modulated data

主题

调制

What Is Modulation?
Define modulation in wireless communication systems.

数字调制

Digital Baseband Modulation

Modulating using digital methods.
- Amplitude Modulation
- Amplitude and Phase Modulation
- Continuous-Phase Modulation
- Frequency Modulation
- Orthogonal Frequency Division Multiplexing Modulation
- Phase Modulation
- Trellis-Coded Modulation
使用 MATLAB 进行 OFDM 调制

正交频分复用 (OFDM) 是现代无线通信系统（如 5G 和 LTE 蜂窝网络以及 WiFi）使用的多载波数字调制方法。相较于其他方法，如单载波 QAM，OFDM 的优势包括以更简单的接收机设计支持更高的数据速率。具体而言，通过将 OFDM 与循环前缀 (CP) 结合使用，可实现基于快速傅里叶变换（基于 FFT）的均衡和同步；与单载波 QAM 中用于接收类似数据速率的方法相比，前者简化了接收过程。有关 OFDM 的概念性说明，请参阅什么是 OFDM？- MATLAB 和 Simulink。此示例集使用 fft 和 ifft 函数演示 OFDM 信号的发射和接收。
- 步骤 1: OFDM 简介
- 步骤 2: 无循环前缀的基本 OFDM
- 步骤 3: 均衡、卷积与循环前缀添加
- 步骤 4: 带前追加循环前缀的 OFDM 和均衡
- 步骤 5: 使用基于 FFT 过采样的 OFDM

模拟调制

Analog Passband Modulation
Modulating using analog passband methods.
Analog Baseband Modulation
Modulating using analog baseband methods.

精选示例

OTFS Modulation

Simulate an OTFS communication link in a high-speed mobile environment.

自 R2024a 起
打开实时脚本

Modulation Classification with Deep Learning

Use a convolutional neural network (CNN) for modulation classification.

打开实时脚本

SC-FDMA vs. OFDM Modulation

Compare OFDM with SC-FDMA highlighting the merits of the SC-FDMA modulation scheme as used in LTE and 5G communication systems.

打开实时脚本

Compare Filter Bank Multi-Carrier (FBMC) with Orthogonal Frequency Division Multiplexing (OFDM) and highlight the merits of the candidate modulation scheme for Fifth Generation (5G) communication systems.

打开实时脚本

F-OFDM vs. OFDM Modulation

Compare Orthogonal Frequency Division Multiplexing (OFDM) with Filtered-OFDM (F-OFDM) and highlight the merits of the candidate modulation scheme for Fifth Generation (5G) communication systems.

打开实时脚本

UFMC vs. OFDM Modulation

Compares Universal Filtered Multi-Carrier (UFMC) with Orthogonal Frequency Division Multiplexing (OFDM) and highlight the merits of the candidate modulation scheme for Fifth Generation (5G) communication systems.

打开实时脚本

Passband Modulation

Simulate passband modulation by multiplying a modulated complex signal with a complex sine wave to perform frequency upconversion.

打开模型

Training and Testing a Neural Network for LLR Estimation

Generate signals and channel impairments to train a neural network, called LLRNet, to estimate exact log likelihood ratios (LLR).

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Log-Likelihood Ratio (LLR) Demodulation

BER performance improvement for QPSK modulation when using log-likelihood ratio (LLR) instead of hard-decision demodulation in a convolutionally coded communication link.

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Concatenated OSTBC with TCM

Simulate orthogonal space-time block code concatenated with trellis-coded modulation for information transmission over a 2-by-1 MIMO channel.

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Concatenated OSTBC with TCM in Simulink

Model orthogonal space-time block code concatenated with trellis-coded modulation for information transmission over a 2-by-1 MIMO channel in Simulink^®.

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LLR vs. Hard Decision Demodulation in Simulink

Improve BER performance by using log-likelihood ratio (LLR) instead of hard decision demodulation in a convolutionally coded communication link.

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OFDM Transmitter and Receiver

Simulate an end-to-end OFDM transmission system for a single-input, single-output (SISO) channel.

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