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An Orthogonal Frequency Division Multiplexing (OFDM) modem is a digital communication device designed to efficiently transmit high-speed data over wireless or wired channels by dividing the available bandwidth into many closely spaced orthogonal sub-carriers. Instead of sending data on a single carrier, the OFDM modem splits the input data stream into multiple parallel streams and modulates each stream onto a different sub-carrier using techniques such as Quadrature Amplitude Modulation (QAM) or Phase Shift Keying (PSK). These sub-carriers are mathematically orthogonal, meaning they can overlap in the frequency domain without causing interference, which significantly improves spectral efficiency. The modem employs digital signal processing techniques like the Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) for efficient modulation and demodulation of the signals. To combat channel impairments such as multipath fading and inter-symbol int...
Qbit Labs Incorporation
An Orthogonal Frequency Division Multiplexing (OFDM) modem is a digital communication device designed to efficiently transmit high-speed data over wireless or wired channels by dividing the available bandwidth into many closely spaced orthogonal sub-carriers. Instead of sending data on a single carrier, the OFDM modem splits the input data stream into multiple parallel streams and modulates each stream onto a different sub-carrier using techniques such as Quadrature Amplitude Modulation (QAM) or Phase Shift Keying (PSK). These sub-carriers are mathematically orthogonal, meaning they can overlap in the frequency domain without causing interference, which significantly improves spectral efficiency. The modem employs digital signal processing techniques like the Fast Fourier Transform (FFT) and Inverse Fast Fourier Transform (IFFT) for efficient modulation and demodulation of the signals. To combat channel impairments such as multipath fading and inter-symbol interference, the OFDM modem typically incorporates a cyclic prefix and channel estimation algorithms. Due to its robustness and high data throughput capability, OFDM technology is widely used in modern communication standards such as Wi‑Fi (IEEE 802.11), 4G LTE, 5G NR, and Digital Video Broadcasting (DVB) systems. Overall, an OFDM modem plays a critical role in enabling reliable, high-capacity communication in broadband networks by maximizing bandwidth utilization and maintaining performance even in challenging transmission environments.
Key Features
- Complete Baseband Processing: Includes IFFT/FFT engine, cyclic prefix insertion/removal, windowing, pilot insertion, channel estimation, equalization, and symbol mapping/de-mapping
- Configurable Parameters: Supports dynamic FFT sizes (64, 128, 256, 512, 1024, 2048), cyclic prefix lengths, modulation schemes, and guard intervals.
- Modulation Support: QPSK, 16-QAM, 64-QAM, 256-QAM, adaptable based on channel conditions or system requirements.
- MIMO Compatibility: Designed to integrate with 2x2, 4x4, and higher MIMO architectures for enhanced throughput and diversity gains.
- Easy Integration with MAC and RF: Standard interfaces (AXI4-Stream, FIFO, custom) for seamless connectivity with MAC layer and RF front ends
Offering Brief
Offering Brief
| Device Family | Agilex® 7 FPGA F-Series, Agilex® 7 FPGA I-Series, Agilex® 7 FPGA M-Series, Arria® 10 GT FPGA, Arria® 10 GX FPGA, Arria® 10 SX FPGA, Stratix® 10 AX FPGA, Stratix® 10 DX FPGA, Stratix® 10 GX FPGA, Stratix® 10 SX FPGA, Stratix® 10 TX FPGA |
|---|---|
| Offering Status | Production |
| Integrated Testbench | Yes |
| Evaluation License | Yes |
| Design Examples Available | Yes |
| Latest Quartus Version Supported | 24.3.1 |
| Development Language | Encrypted Verilog, Verilog |
Synthesizable RTL source code
Directed/random/constrained-random sequences covering LTSSM, configuration, link training, FLIT mode, error injection (FEC/CRC scenarios), power states, reset
Embedded firmware / low-level SW
Software integration guide
Full design documentation
Ordering Information
QBL-IP-OFDM-Modem-1
from Direct
$0.00
Market Segment and Sub-Segments
Aerospace
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Broadcast
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Defense
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Government
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