802.11n Modem IP
OFDM Modems are used in systems which are subjected to large frequency selective fading which results in inter symbol interference (ISI). By using a cyclic prefix (CP), OFDM system provides robustness against ISI. Further there is no need of complex adaptive equalizer as in single tone system. Hence, OFDM modem have found their place in most of the latest standards including Wi-Fi (802.11n, 802.11ac), Wi-Max (802.16e), DVB-S2, 3GPP-LTE Advanced.
- Fully synchronous design using a single clock
- 512 Point FFT to minimize Cyclic Prefix Overhead
- Modulation scheme used is QPSK, QAM
- Option for latest FEC codec such as LDPC/ Turbo Convolution Code (TCC)
- Adaptive length of Cyclic Prefix (CP) to improve the band-width efficiency and take care of large delay spread.
- Adaptive modulation depending upon the link quality
- Traveling Pilots to improve the channel estimation in time varying channel
- Carrier and Sampling frequency offset estimation and compensation up to 50 ppm
- Very low (10-6) packet miss and false packet detection probability
- Options of standard and burst preambles
- Implementation Loss is minimized to 0.5 dB by using an innovative bit-width optimization scheme
- Easy-to-use interface with handshaking signals
- Supports all FPGA devices
- Maximum synthesizable frequency is 100MHz to 200 MHZ depending on target FPGA
IP Data Fact Sheet | ||
Parameter | Value | |
Modulation | QPSK, 16QAM, 64QAM | |
FEC Scheme | RSC, LDPC, TCC | |
Code Rate | 1/2, 2/3, 3/4, 5/6, 7/8 | |
No. of Data Carrier | 480, 348, 384 | |
No. of Pilot Carrier | 32, 64, 128 | |
Cyclic Prefix Length | 32, 64, 128 | |
Provided with IP | ||
Documents | Product Specification | |
Design Files | RTL-VHDL (Optional) | |
Reference Design | Provided | |
System Generator Model | Provided (Optional) | |
Matlab Bit-Accurate Model | Provided (Optional) | |
Design Tools | ||
Simulation | ModelSim SE | |
Synthesis Tool | Xilinx ISE /Altera Quartus | |
Support | ||
Three Month Support Provided |