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A two-path model, where each path includes a linear Doppler frequency offset, is commonly applied for modeling aeronautical channels under an en-route scenario. In this study, a maximum-likelihood (ML) channel estimation-based channel response differential correlation method is used to estimate a bilinear Doppler frequency offset. Specifically, reference symbols and ML estimation are used to obtain...
In broadband wireless communication systems, orthogonal frequency division multiplexing (OFDM) will suffer from severe performance degradation in the presence of phase noise (PHN) especially for the applications with narrow subcarrier spacing to support high bit rate. In the Chinese digital television terrestrial multimedia broadcasting (DTMB) system the time-domain synchronous OFDM (TDS-OFDM) is...
According to the system requirements, the multicarrier OFDM transmission scheme was proposed in intra-flight data link (IFDL) physical layer. Considering the anti-jamming vulnerability, the reliabilities of OFDM system were quantitatively analyzed under several burst interference. Combined with the convolution interleaving, (255,223)RS-(2,1,7) convolution concatenated coding that was proposed originally...
Fractional frequency reuse (FFR) is often used in interference-limited systems to improve coverage in cellular networks. Its cost is reducing the amount of available resources. In this paper, we intend to propose the FFR scheme by introducing the concept of normalized spectral efficiency (nSE). With the optimal frequency reuse factor (FRF), the FFR scheme can maximize the system SE with throughput...
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