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Methods for the determination of FEC parameters in DMT based xDSL systems in the presence of system imposed constraints
Methods for the determination of FEC parameters in DMT based xDSL systems in the presence of system imposed constraints
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机译:在系统施加约束的情况下,在基于DMT的xDSL系统中确定FEC参数的方法
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摘要
The present invention provides procedures for computing Forward Error Correction (FEC) parameters given a set of constraints on maximum interleaver memory, maximum interleaver depth, maximum codeword size, maximum number of check bytes, maximum number of FEC codewords per Discrete Multi-Tone (DMT) symbol, and minimum number of DMT symbols that the FEC must correct, as well as any constraints imposed by the interleaver. These procedures are implemented on a computational engine in a modem, enabling it to achieve optimal performance in all cases. In addition these procedures can be applied as part of any bit loading algorithm to determine the optimal FEC parameters, taking into account the Signal-to-Noise Ratio (SNR) profile, the FEC coding gain, the constraints of the framer, and any application specific constraints.
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