Product Details
Documentation
Device Family Support
- Spartan-3E
- Spartan-II
- Virtex-4 FX
- Virtex-4 LX
- Virtex-4 SX
- Virtex-5 LX
- Virtex-5 LXT
- Virtex-5 SXT
- Virtex-II
- Virtex-II Pro
Requirements
- Xilinx ISE™ 9.2i IP Update 2 or later
- All supported ISE platforms
The IEEE 802.16e CTC Decoder Core performs iterative decoding of channel data that has been encoded as described in Section 8.4 of the IEEE Std 802.16-2004 specification. The IEEE 802.16e code is a parallel concatenated convolutional code with an input data block of 2N bits. Through parallel processing with parameterizable number of SISOs (1 to 8) this LogiCORE™ IP is capable of achieving high throughput: decoded data rate exceeds 58 Mb/s with four iterations using four SISOs at 180-MHz clock frequency.
Key Features
- Supports all interleaver block sizes of the CTC OFDMA PHY mode including the H-ARQ mode: 24, 36, 48, 72,96, 108, 120, 144, 180, 192, 216, 240, 480, 960, 1440, 1920 and 2400 pairs
- Supports dynamic block size switching without interruption
- Programmable number of iterations dynamically changeable per block
- Parameterizable options for soft data input, extrinsic bits, and accumulated state metric
- Adaptive rate change via puncturing interface
- Performs parallel processing with parameterizable number of SISOs (1 to 8) to achieve high throughput
- Decoded data rate varies from 53 Mbps to76 Mbps Virtex™-5 (slowest speed grade, 4 SISO option)
- Latency varies between 4μs and 63μs when targeting Virtex-5 (slowest speed grade, 4 SISO option)
