Modulation
R2026bModulate and demodulate signal data using digital baseband, analog baseband, and analog passband techniques.
Functions
Objects
Blocks
Amplitude Modulation
 | 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 |
Amplitude and Phase Modulation
 | 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 |
Continuous Phase Modulation
 | 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 signal using Gaussian minimum shift keying method |
 | GMSK Demodulator Baseband | Demodulate signal using Gaussian minimum shift keying method and Viterbi algorithm |
 | MSK Modulator Baseband | Modulate using differentially encoded minimum shift keying method |
 | MSK Demodulator Baseband | Demodulate differentially encoded MSK-modulated data |
Frequency Modulation
 | M-FSK Modulator Baseband | Modulate using M-ary frequency shift keying method |
 | M-FSK Demodulator Baseband | Demodulate FSK-modulated data |
OFDM Modulation
 | OFDM Modulator Baseband | Modulate using OFDM method |
 | OFDM Demodulator Baseband | Demodulate using OFDM method |
Phase Modulation
 | 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 |
Trellis-Coded Modulation
 | 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 |
Utilities
 | 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 |
 | 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 |
 | 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 |
Topics
Modulation
- What Is Modulation?
Define modulation in wireless communication systems.
Digital Modulation
- Digital Baseband Modulation
Modulating using digital methods.
- OFDM Modulation Using MATLAB
Orthogonal Frequency Division Multiplexing (OFDM) is the multicarrier digital modulation technique used by modern wireless communications systems such as 5G and LTE cellular, and WiFi.
Analog Modulation
- Analog Passband Modulation
Modulating using analog passband methods. - Analog Baseband Modulation
Modulating using analog baseband methods.
Featured Examples
OTFS Modulation
Simulate an OTFS communication link in a high-speed mobile environment.
Modulation Classification with Deep Learning
Use a convolutional neural network (CNN) for modulation classification.
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.
FBMC vs. OFDM Modulation
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.
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.
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.
Passband Modulation
Simulate passband modulation by multiplying a modulated complex signal with a complex sine wave to perform frequency upconversion.
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).
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.
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.
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®.
Soft Decision GMSK Demodulator
A system that includes convolutional coding and GMSK modulation. The receiver in this model includes two parallel paths, one that uses soft decisions and another that uses hard decisions. The model computes bit error rates for the two paths to illustrate that the soft decision receiver performs better. The performance advantage for soft decision reception over hard decision reception is expected because soft decisions enable the system to retain more information from the demodulation operation to use in the decoding operation.
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.
OFDM Transmitter and Receiver
Simulate a link-level OFDM transmission system for a single-input, single-output (SISO) channel.
