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In an acoustic communication system that employs orthogonal frequency division multiplexing (OFDM), the presence of considerable Doppler spread destroys the frequency orthogonality of OFDM, and thus inter-carrier interference (ICI) is introduced, which increases the bit error rate (BER). This work proposes a channel equalizer based on the BCJR algorithm (BCJRE) for mitigating ICI. Its performance...
Complementary sets of sequences (CSS) are widely used in communications field due to their good correlation properties. The use of multilevel CSS reduces the binary CSS limitations in length and number of sequences per set, giving more flexibility in their applications, but with a higher computational complexity in the implementation of the generation and/or correlation algorithms. Although efficient...
Complementary Set of Sequences (CSS) are being widely used in communications due to the ideal correlation properties and the availability of efficient correlators that significantly reduce the number of computations in the detection process. In this paper, the performance of the acoustic signals encoded by multilevel CSS in an underwater horizontal link is analysed. For that, a channel propagation...
In the past few years, the use of Complementary Set of Sequences (CSS) had a considerable impact on several applications, such as: OFDM or quasi-synchronous CDMA communication systems, multiuser active sensing systems, or the development of non-destructive testing (NDT). Their use is attractive due to the ideal aperiodic correlation properties of the sequences. There are efficient architectures to...
The computation of relative positions among mobile objects is a useful information when are not constrained to a specific environment and they cannot depend on an external infrastructure to obtain their location information. The resolution of this kind of problems cannot be treated separately for each object. Thus, it is necessary to use ranging mechanisms that allow to simultaneously measuring the...
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