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- W29602843 abstract "When transmitting a sampled signal digitally, an alternative to fixed power/bit is vary the power allocated to each bit to minimize signal distortion. We adjust the power here by allowing each bit interval’s duration, whether a data bit or an error-correction bit, to vary and seek the set of bit durations that minimize the mean-squared reconstruction error. For smaller signal-to-noise ratios (SNR), the optimal solution amounted to only sending the most significant bits, with bit duration decreasing as the bit’s significance to the sample decreases. As SNR increases, the optimal solution has more bits being transmitted, with durations becoming equal at high SNRs. The optimal solution yields significant gains in mean-squared error (several dB) over a wide range of channel signal-to-noise ratios when compared that provided by equal-duration bit intervals. When block error correction is performed, we derive the optimal decoder for variable bit-error probabilities and show that gains obtain here as well. For smaller signal-to-noise ratios, using no error correction was optimal as it expends power without sufficiently decreasing the meansquared error." @default.
- W29602843 created "2016-06-24" @default.
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- W29602843 date "2003-01-01" @default.
- W29602843 modified "2023-10-11" @default.
- W29602843 title "Optimizing bit-by-bit power for minimal distortion" @default.
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