Performance evaluation of speech quality for VOIP on the internet
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... an open-loop MIMO OFDM-CDMA scheme using space-timefrequency spreading (STFS), in the presence of frequency-selective Rayleigh-fading channel The BER and BLER performance of the OFDM-CDMA system ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM–CDMA scheme using STFdomain spreading is investigated with zero-forcing...
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Báo cáo toán học: " Performance evaluation of space-time-frequency spreading for MIMO OFDM-CDMA systems" pptx
... N c , the OFDM-CDMA 60 Proposed OFDM-CDMA 2D OFDM-CDMA Number of Users 50 40 30 20 10 0 10 12 14 16 SNR dB Figure 10 System throughput comparison for OFDM-CDMA system with 4Tx, 4Rx of the proposed ... scheduling In addition, it offers better diversity/multiplexing trade-off The performance of MIMO OFDM-CDMA scheme using STF-domain spreading is investigated with zero-fo...
Báo cáo hóa học: " Research Article The Effect of a Voice Activity Detector on the Speech Enhancement Performance of the Binaural Multichannel Wiener Filter" ppt
... with attack and release time constants τraise and τdecay The differences between the maxima and minima are calculated to obtain the current dynamic range of the signal (4) The decision for a speech ... vectors containing speech samples will be added to the noise data matrix in (5), which leads to cancellation of parts of the speech signal On the other hand, if t...
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Performance evaluation of speech quality for VOIP on the internet
... quality of VoIP applications In the following sections, we will introduce the speech quality evaluation methods used to measure the quality of VoIP applications 2.4.1 Subjective Speech Quality ... system on PlanetLab and conducted a set of experiments for speech quality evaluations • Second, we studied the characteristics of the Speex and SILK codec...
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