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)
CCSDS LDPC Encoder	Encode data with (8160,7136) LDPC code specified in CCSDS telemetry standard (Since R2025a)
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
NR LDPC Decoder	Decode LDPC code according to 5G NR standard
NR Polar Encoder	Perform polar encoding according to 5G NR standard
NR Polar Decoder	Perform polar decoding according to 5G NR standard
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
LDPC Encoder	Encode data with 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
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
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)
Symbol Modulator	Modulate data bits to complex data symbols (Since R2025a)
GMSK Modulator	Modulate data bits using Gaussian minimum shift keying (GMSK) method (Since R2024a)