AHA4540

The AHA4540 is a single-chip Turbo Product Code (TPC) Forward Error Correction (FEC) Encoder/Decoder that operates at OC-3 data rates. The device integrates both a TPC encoder and decoder and can be operated in a full-duplex mode. TPCs offer a higher performance alternative to Reed-Solomon or Reed-Solomon concatenated with Viterbi error correction methods. Ideal for communication applications, such as LMDS, broadband access HDTV, wireless backhaul or 3G cellular backhaul, the AHA4540 will improve speed or performance for nearly any system.

Features

• Maximum 174 Mbit/sec channel rate
• Payload data rates of at least 155 Mbit/sec for code rates of 0.90 or higher
• Built-in helical scrambling
• Programmable code shortening supports exact block sizes
• Code rates from 0.2 to 0.98
• Block sizes from 256 bits to 16k bits
• RoHS compliant

Turbo Product Codes

Application Notes

• Primer: Turbo Product Codes
• Use and Performance of Shortened Codes with the AHA4501 TPC Encoder/Decoder
• Turbo Product Code Encoder/Decoder with Quadrature Amplitude Modulation (QAM)
• Use and Performance of the AHA4501 TPC Encoder/Decoder with Differential Phase Shift Keying (DPSK)
• Using the AHA4540 with the ARIB Standard
• Non-Square QAM Implementation for AHA4540
• AHA4540A and AHA4540B Device Differences
• Lead-Free (RoHS/Green) Conversion

• TPC Simulation Software

• AHA4540 Astro OC-3 Product Backgrounder

• Environmental Program Overview

• Turbo Product Code Products Overview

• Astro OC-3 Forward Error Correction Reduces Bandwidth 2X
• Evaluation Board for 155 MBit/Sec TPC plus Modulation Solution
• Comtech AHA Improves Astro OC-3 Forward Error Correction Chip
• RoHS Compliant Integrated Circuits Now Available from Comtech AHA Corporation

• AHA4540B Brief - 155 Mbits/sec TPC Encoder/Decoder IC
• AHA4540 TPC Evaluation Board - Product Brief

• AHA4540B Specification - 155 Mbits/sec TPC Encoder/Decoder IC
• AHA4540 TPC Evaluation Board - Specification

• Next Generation Direct-to-Home Satellite Systems
• System Level Design Guidelines for the Use of Turbo Product Codes
• Using Turbo Product Codes in Client Station Uplink for Reduced Power Consumption

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