8-bit data to 1-bit bitwise output circuit simulation

Jul 14, 2025#FPGA10

AI Translation

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AI-generated summary

The document discusses a simulation circuit for converting 8-bit data to a 1-bit output in a DVB-S system. After RS encoding, the uint8 data needs to be transformed into a binary stream for QPSK mapping. The approach involves using a BitwiseOperator module to extract each of the 8 bits and a counter to enable a multiplexer (mux) to output these bits sequentially over 8 clock cycles. The simulation results show that the input value of 133 (binary 10000101) produces the expected output.

In the DVB-S system, the TS stream becomes uint8 type data after RS encoding. During the subsequent QPSK constellation mapping, a binary bitstream is required. Therefore, after RS encoding, the 8-bit data needs to be converted into 1-bit serial output.

Implementation Idea#

First, use the BitwiseOperator module for bitwise AND operations to extract the 8-bit binary data. Then, use a counter to generate a counting signal from 0 to 7 as the enable signal for the mux module, outputting the extracted 8-bit data over 8 clock cycles.

Structural Block Diagram#

Simulation Results#

The input data is 133, which is binary 10000101. It can be seen that the output result meets the requirements.