Turbo-Decoder Implementation for the Deep Space Network
نویسندگان
چکیده
Since their discovery in 1993, turbo codes have been found to provide excellent performance with relatively low complexity. Turbo codes have been added to the Consultative Committee for Space Data Systems (CCSDS) standards for telemetry channel coding, and turbo encoders are being included in spaceflight hardware and software. This article describes the design of the prototype turbo decoder for the Deep Space Network (DSN). The decoder uses eight digital signal processors (DSPs) operating together to perform the decoding, frame synchronization, and control and interfacing. The key algorithms are described here, with the modifications and optimizations used in the assembly language implementation.
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