HDL-Optimized System Design

Choose algorithms for wireless communications hardware system design

These blocks implement hardware-friendly architectures and support HDL code generation when used with HDL Coder™. The blocks on this page also have streaming interfaces that process a single sample or a vector of samples at a time, hardware control signals, and options to select different hardware implementations of their algorithms.

Blocks

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Block Coding

CCSDS RS Encoder	Encode message into RS codeword according to CCSDS standard (Since R2022a)
CCSDS RS Decoder	Decode and recover message from RS codeword according to CCSDS standard (Since R2021b)
CCSDS LDPC Decoder	Decode LDPC code according to CCSDS standard (Since R2022b)
DVB-S2 BCH Decoder	Decode and recover message from BCH codeword according to DVB-S2 standard (Since R2022a)
DVB-S2 LDPC Decoder	Decode LDPC code according to DVB-S2 standard (Since R2022a)
NR LDPC Encoder	Perform LDPC encoding according to 5G NR standard (Since R2020a)
NR LDPC Decoder	Decode LDPC code according to 5G NR standard (Since R2020a)
NR Polar Encoder	Perform polar encoding according to 5G NR standard (Since R2020a)
NR Polar Decoder	Perform polar decoding according to 5G NR standard (Since R2020a)
WLAN LDPC Decoder	Decode LDPC code according to WLAN standard (Since R2021b)
RS Encoder	Encode message to RS codeword (Since R2020b)
RS Decoder	Decode and recover message from RS codeword (Since R2020a)
LDPC Encoder	Encode quasi-cyclic low-density parity-check code (Since R2023a)
LDPC Decoder	Decode quasi-cyclic low-density parity-check code (Since R2023b)

Convolutional Coding

APP Decoder	Decode convolutionally-coded LLR values using MAP algorithm (Since R2021b)
LTE Convolutional Encoder	Encode binary samples using tail-biting convolutional algorithm
LTE Convolutional Decoder	Decode convolutional-encoded samples using Viterbi algorithm
LTE Turbo Encoder	Encode binary samples using turbo algorithm
LTE Turbo Decoder	Decode turbo-encoded samples
Convolutional Encoder	Encode data bits using convolution coding — optimized for HDL code generation
Puncturer	Punctures data according to puncture vector
Depuncturer	Reverse puncturing scheme to prepare for decoding
Viterbi Decoder	Decode convolutionally encoded data using Viterbi algorithm

Cyclic Redundancy Check (CRC) Coding

LTE CRC Encoder	Generate checksum and append to input sample stream
LTE CRC Decoder	Detect errors in input samples using checksum
NR CRC Encoder	Generate CRC code bits and append them to input data (Since R2021a)
NR CRC Decoder	Detect errors in input data using CRC (Since R2021a)

Modulation

DVB-S2 Symbol Demodulator	Demodulate complex constellation symbol to set of LLR values or data bits according to DVB-S2 standard (Since R2021b)
DVB-S2 Symbol Modulator	Modulate data bits to complex constellation symbols according to DVB-S2 standard (Since R2022b)
LTE OFDM Modulator	Modulate LTE resource grid and return time-domain OFDM samples
LTE OFDM Demodulator	Demodulate time-domain OFDM samples and return LTE resource grid
LTE Symbol Modulator	Modulate data bits to complex LTE data symbols
LTE Symbol Demodulator	Demodulate complex LTE data symbols to data bits or LLR values
NR Symbol Modulator	Modulate data bits to complex NR data symbols
NR Symbol Demodulator	Demodulate complex NR data symbols to data bits or LLR values
FFT 1536	Computes fast-fourier-transform (FFT) for LTE standard transmission bandwidth of 15 MHz
OFDM Channel Estimator	Estimate channel using input data and reference subcarriers (Since R2020a)
OFDM Equalizer	Equalize OFDM data using channel estimates (Since R2021a)
OFDM Modulator	Modulate frequency-domain OFDM subcarriers to time-domain samples for custom communication protocols (Since R2020a)
OFDM Demodulator	Demodulate time-domain OFDM samples and return subcarriers for custom communication protocols
Symbol Demodulator	Demodulate complex constellation symbol to set of LLR values or data bits (Since R2022a)
GMSK Modulator	Modulate data bits using Gaussian minimum shift keying (GMSK) method (Since R2024a)

Utilities

LTE Gold Sequence Generator

Generate Gold sequence

Featured Examples

Sample Rate Conversion for an LTE Receiver

Implement sample rate converter for LTE receiver front end.

Open Script

HDL Code Generation for Filtered OFDM (F-OFDM) Transmitter

Filter symbols after IFFT to improve bandwidth while maintaining orthogonality.

Open Script

HDL Implementation of Variable-Size FFT

Implement variable-size FFT by using single FFT core.

Open Script

Accelerate BER Measurement for Wireless HDL LTE Turbo Decoder

Measure BER of LTE Turbo Decoder block using parsim to parallelize simulations across EbNo points.

Open Script

HDL Implementation of AWGN Generator

Implement AWGN generator that is optimized for HDL code generation and hardware implementation.

Open Script

HDL Interleaver and Deinterleaver

Design and implement interleaving and deinterleaving in communication systems.

Open Script

HDL Implementation of Digital Predistorter

Implement Digital Predistorter that is optimized for HDL code generation and hardware implementation.

Open Script

HDL Implementation of Digital Predistorter with LMS Coefficient Estimation

Implement DPD with LMS coefficients and pre-calculated coefficients optimized for HDL code generation.

Open Model

DVB-S2 HDL LDPC Encoder

Implement DVB-S2 LDPC encoding using Simulink® blocks that are optimized for HDL code generation.

Open Script

DVB-S2 HDL BCH Encoder

Implement DVB-S2 BCH encoder using Simulink® blocks that are optimized for HDL code generation.

Open Script

WLAN HDL LDPC Encoder

Implement WLAN LDPC encoder using Simulink® blocks that are optimized for HDL code generation.

Open Script

HDL Neural Network Design for Digital Predistorter

Use neural-network-based (NN-based) digital predistorter (DPD) to compensate effects of nonlinearities in power amplifier.

Open Script

HDL Digital Automatic Gain Control for Single and Multicarrier Systems

Implement digital AGC for single-carrier and multicarrier systems using Simulink® blocks optimized for HDL code generation.

Open Model

HDL Implementation of SISO Fading Channel

Use SISO fading channel to evaluate performance of wireless communication systems over Rayleigh and Rician fading channels.

Open Script

Parallel Concatenation Using APP Decoder

Decode parallel concatenated convolution codes using APP Decoder block.

Open Script

HDL Implementation of IQ Imbalance Estimation and Compensation

Implement IQ imbalance estimation and compensation on QAM/PSK modulated signals.

Open Script