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Spectrally Efficient Frequency Division Multiplexing (SEFDM) system proposes enhanced spectrum utilization in contrast to Orthogonal Frequency Division Multiplexing system (OFDM). Spectral efficiency is increased by relaxing the orthogonality condition while maintaining the same transmission rate per individual channel, hence, for the same bandwidth allocation SEFDM offers higher throughput than OFDM...
The paper describes that for a uniform linear array (ULA), discrete Time Fourier transform (DTFT) based direction of arrival (DOA) estimation relies on knowledge of the power spectral density (PSD). Discrete Fourier transform (DFT) with zero padding follows DTFT algorithm, which finally reaches resolution of space frequency. We present a novel approach for signal tracking, which updates the signal...
Speech enhancement is the processing of speech signals in order to improve one or more perceptual aspects. If the statistics of the clean signal and the noise process are explicitly known, enhancement could be dasiaoptimallypsila accomplished (minimizing a distortion measure between the clean and the estimated signals). In practice however, these statistics are not explicitly available, and the overall...
Spectrum sensing in the context of wireless microphone (WM) signals is considered in this paper. The spectrum sensing algorithm developed in this study makes use of the property that the bandwidth of the WM signal is narrow compared with the bandwidth of a digital television (DTV) channel. As a result, the power of the WM signal is highly concentrated in the frequency domain and there are apparent...
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