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Design Notes
Standard Turbo Encoder and Decoder
This example shows how to use of the VSS standard turbo encoder and decoder. TURBO_ENC_STD is a turbo encoder that supports various standard turbo codes. The user can select the appropriate standard, code rate and block length. TURBO_DEC_STD is a typical iterative turbo decoder, which can can be configured automatically using code parameters propagated by the turbo encoder. A BER meter may be used to measure BER and sweep Eb/N0. An AWGN model is used to simulate the propagation channel based on the Eb/N0 setting. Please note that the noise level is set according to Es/N0, which is calculated based on Eb/N0 by using appropriate scaling to account for the coding gain and modulation type.
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