Báo cáo hóa học: " Research Article Degenerated-Inverse-Matrix-Based Channel Estimation for OFDM Systems" pdf
Báo cáo hóa học: " Research Article Crosstalk Channel Estimation via Standardized Two-Port Measurement" potx
... instancem0and m, for example, it is assumed that Pz(m) ≈ Pz(m0) for the FEXT case, and Pw(m) ≈ Pw(m0) for the NEXTcase. As before, we use the same notation for estimation sequence ... crosstalk channel estimation, is the high atten-uation of the crosstalk channel, which becomes a majordrawback since the SELT signal has to travel back andforth. In literature, several two-port estimation ... trans-mission from one user at a time and for all K subchannels. Inorder to simplify the notation, we let transmitter m be activeat estimation sequence m. Hence, for estimation sequence m,the SIMO system...
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Báo cáo hóa học: " Research Article Optimal Channel Selection for Spectrum-Agile Low-Power Wireless Packet Switched Networks in Unlicensed Band" doc
... We can observe that these parameters arerelatively constant for channel 6 and change every 20 seconds for channel 11.We also performed statistical analysis to find any patternsin the busy periods. ... correlation and capitalize on it for channel selection.2.2. Channel access modelIn this section, we describe how SA nodes access the channel, and how they collect information on the interference ... (11)Following the above formulation, the history of trans-mission outcomes for each channel can be written as x(t)=(it, bt, st, ft) which we call the informational state of each channel. Knowing...
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Báo cáo hóa học: " Research Article MAP Channel-Estimation-Based PIC Receiver for Downlink MC-CDMA Systems" docx
... DFT-based channel estimation for OFDM, ” Wireless Personal Communications,vol.12,no.1,pp.55–70, 2000.[17] O. Edfors, M. Sandell, J J. van de Beek, S. K. Wilson, and P. O.Borjesson, OFDM channel estimation ... approach pro-posed for the general estimation from superimposed signals[6] is applied to the channel estimation for OFDM systemsand compared with SAGE version in [7]. For CDMA sys-tems, Nelson ... estimate the channel parameters from the time-domain channel model (channel impulse response), in ourRxPilot basedinitial estimation OFDM demodulatorCalculation ofΓ(q)MAP channel estimation PICFigure...
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Báo cáo hóa học: " Research Article Joint Linear Processing for an Amplify-and-Forward MIMO Relay Channel with Imperfect Channel State Information" pdf
... ProcessingVolume 2010, Article ID 640186, 13 pagesdoi:10.1155/2010/640186 Research Article Joint Linear Processing for an Amplify-and-Forward MIMO Relay Channel with Imperfect Channel State Informati onBatu ... impractical if the design is based oninstantaneous channels [23]. Therefore, robust designs basedon channel covariance information [20] can be appropriate for such a scenario. ) .Remark 1. It is worthwhile ... equalizer for the MIMO relay channel with thedirect link. The closed-form solutions and the approximateGP problem formulation are provided in Section 4 for theMIMO relay channel without the direct...
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Báo cáo hóa học: " Research Article Adaptive Channel-Tracking Method and Equalization for MC-CDMA Systems over Rapidly Fading Channel under Colored Noise" doc
... parameter estimation in (19) is in block form, which is not suitable for real-time design in the MC-CDMA communication systems. Arecursive parameter estimation for (19)andanestimatefornoise ... complicated. But onlyan algorithm is needed for the channel estimation, nomatter how many subchannels the MC-CDMA system has.However, the channel- parameter estimation in the timedomain is easily ... frequency-domain pilot-aided channel estimation for Hn(m) is not reliable if the interference powerAn(m) is high at that subchannel. Therefore, it is not easyto estimate channel Hn(m) accurately...
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Báo cáo hóa học: " Research Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information" potx
... convenience of the reader.ThePUchannelisWpHz wide and the bandwidth ofeach OFDM subchannel is WsHz. On either side of thePU channel, there are N/2 OFDM subchannels. The BS hasonly partial ... Resource allocation algorithms for MU -OFDM systems have been studied in [11–14]. These algorithms aredesigned for non-CR MU -OFDM systems in which there areno PUs.In an MU -OFDM CR system, mutual interferencebetween ... Article ID 189157, 8 pagesdoi:10.1155/2010/189157 Research Article Resource Allocation in MU -OFDM Cognitive Radio Systems withPartial Channel State InformationDong Huang,1Zhiqi Shen,2Chunyan...
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Báo cáo hóa học: " Research Article Joint Channel-Network Coding for the Gaussian Two-Way Two-Relay Network" docx
... transmissionstrategies, namely, amplify-forward (AF), hybrid decode amplify forward (HLC), hybrid decode amplify forward (HMC), decodeforward (DF), and partial decode forward (PDF) , are proposed. Their designs ... C2(HB)TNB pdf −1HBKR, (59)RB≤ C2HB pdf TNA pdf −1HB pdf KB, (60)whereNi pdf ζ21hi1hTi1+ ζ22hi2hTi2+ Inσ2,HB pdf ζ1hA1hTB1+ ... Wireless Communications and NetworkingVolume 2010, Article ID 708416, 13 pagesdoi:10.1155/2010/708416 Research Article Joint Channel- Network Coding for the Gaussian Two-WayTwo-Relay NetworkPing...
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Báo cáo hóa học: " Research Article Blind Channel Equalization Using Constrained Generalized Pattern Search Optimization and Reinitialization Strategy" doc
... performs well for valuesof N≥ 1000 and is comparable to the Wiener equalizer for N= 2000. For performance comparison with the constantmodulus algorithm, we use the BERGulator software for ... interference (ISI) formuladefined in terms of the global channel- equalizer taps asISI=(i|gi|2) −|g|2max|g|2max,(3)where|g|maxstands for the maximum joint channel- equalizer ... CorporationEURASIP Journal on Advances in Signal ProcessingVolume 2008, Article ID 765462, 11 pagesdoi:10.1155/2008/765462 Research Article Blind Channel Equalization Using Constrained GeneralizedPattern...
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Báo cáo hóa học: " Research Article Blind Channel Equalization with Colored Source Based on Constrained Optimization Methods" pptx
... to generate acorrect equalizer for a channel with colored input. Since the estimation ofh and the proof of (18)donotrequirewhiteinput, the estimation of the channel will not be affected bycolored ... equalizerachieves a performance close to the trained MMSE equalizer for channels with white inputs at high SNR. The introducedTsatsanis and Xu’s (TX’s) CMOV algorithm obtains the channel information from ... anew blind channel equalizer for channels with colored inputsbased on the known source second-order statistics. Notethat our developed method is different from both semiblind channel estimation...
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Báo cáo hóa học: " Research Article Single-Channel Talker Localization Based on Discrimination of Acoustic Transfer Functions" pot
... fourtalkers.4.2. Performance in a Simulated Reverberant Environment.Figure 6 shows the localization accuracy in the three-position estimation task, where 50 words are used for the estimation of the ... com-ponents for the acoustic transfer function, the localizationaccuracy is improved. We can expect that the GMM for the acoustic transfer function is effective for carrying outlocalization estimation. Figure ... The estimation isimplemented by maximizing the likelihood of the trainingdata from a user’s position. In [14], an ML estimation method to decrease the acoustic mismatch for a telephonechannel...
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