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comtech aha corporation PRODUCT BRIEF*
AHA4541
311 MBITS/SEC TURBO PRODUCT CODE ENCODER/DECODER
The AHA4541 device is a single-chip Turbo Product Code (TPC) Forward Error Correction (FEC) Encoder/Decoder capable of 311 Mbit/sec data rates (up to 360 Mbit/sec channel rates). This device integrates both a TPC encoder and decoder, and can be operated in a full duplex mode. In addition to TPC coding, support is included for helical interleaving, synchronization mark insertion and detection, CRC computation, scrambling, and higher order modulation symbol mapping. Figure 1 shows the functional block diagram. The channel interface supports direct connection to various modulators and demodulators. Support for an arbitrary constellation mapping is included with external logic.