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Selectable Puncturing Rates: 1/3, 1/2, 2/3, 3/4, 7/8, or fully programmable using external puncturing logic. |
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Automatic Phase Synchronization:
BPSK and QPSK using Viterbi Mode. 8-PSK and 16-PSK using Trellis Mode. |
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BER monitoring using both correction count and path metric accumulator growth. |
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Operates using either 4-bit soft decision or 1-bit hard decision input. |
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Fully synchronous design. |
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Available as synthesizable Verilog-HDL source. |
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Includes test-vector files, as well as Verilog test benches. |
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Includes Synopsys synthesis scripts. |
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Intended replacement for Qualcomm Q1900 Viterbi/Trellis Decoder. |
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Customization available per request. |
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Viterbi Mode complies with INTELSAT IESS-308 and INTELSAT IESS-309. |
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Standard design requires approximately 26,000 gates in addition to 16k bits of single port RAM (with 96 symbol trace-back depth). |
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Requires 5 clocks per input symbol. (Other versions available upon request.) |
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Variable trace-back depth, either hard coded or programmable. |
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160 symbol delay at 96 symbol trace-back depth. |