Abstract: Units of forward error correction (FEC) encoded bits each represent a one-bit data value and include correctness bits that together reflect a probability that the one-bit data value represented by the unit is correct. The units of FEC encoded bits are decoded by using the correctness bits to perform soft-decision convolution decoding on the units of FEC bits. Block code symbols that are prone to having been erroneously decoded via soft-decision convolution decoding are identified by determining whether the convolutional decoder “changes its mind” as indicated by a trellis decode path change during the convolutional decoding such that the last state of a lowest cost path after the path change does not agree with the penultimate state of a lowest cost path immediately prior to the path change. Such a path change indicates that the data input to the convolutional decoder is so corrupted so as to be substantially unlikely to be correctly decoded by the convolutional decoder.

Abstract: Units of forward error correction (FEC) encoded bits each represent a one-bit data value and include correctness bits that together reflect a probability that the one-bit data value represented by the unit is correct. The units of FEC encoded bits are decoded by using the correctness bits to perform soft-decision convolution decoding on the units of FEC bits. Block code symbols that are prone to having been erroneously decoded via soft-decision convolution decoding are identified by determining whether the convolutional decoder “changes its mind” as indicated by a trellis decode path change during the convolutional decoding such that the last state of a lowest cost path after the path change does not agree with the penultimate state of a lowest cost path immediately prior to the path change. Such a path change indicates that the data input to the convolutional decoder is so corrupted so as to be substantially unlikely to be correctly decoded by the convolutional decoder.

Abstract: An ultra wideband (UWB) jamming system comprises a processor, a memory, a pulse generator, a UWB transmitter, and an UWB antenna. In an exemplary embodiment of the present invention, the RF signals of the RTED triggering device are evaluated and a set of interference parameters defined for the RF signal of that device. The interference parameters are predetermined to interfere with the reception of the RF signal of that device by a RTED receiver. The interference parameters are sent to a pulse generator that drives a UWB transmitter to generate a signal has a statistically high probability of introducing an error in a bit stream of the RTED signal before it is received by the RTED receiver thereby preventing detonation of the RTED.