Báo cáo hóa học: " Research Article Degenerated-Inverse-Matrix-Based Channel Estimation for OFDM Systems" pdf

... instance m 0 and m, for example, it is assumed that P z (m) ≈ P z (m 0 ) for the FEXT case, and P w (m) ≈ P w (m 0 ) for the NEXT case. 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 major drawback since the SELT signal has to travel back and forth. In literature, s...

Ngày tải lên: 21/06/2014, 22:20

... We can observe that these parameters are relatively constant for channel 6 and change every 20 seconds for channel 11. We also performed statistical analysis to find any patterns in the busy periods. ... correlation and capitalize on it for channel selection. 2.2. Channel access model In this section, we describe how SA nodes access the channel, and how they collect information...

Ngày tải lên: 21/06/2014, 22:20

... 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 systems and compared with SAGE versi...

Ngày tải lên: 22/06/2014, 19:20

... Processing Volume 2010, Article ID 640186, 13 pages doi:10.1155/2010/640186 Research Article Joint Linear Processing for an Amplify-and-Forward MIMO Relay Channel with Imperfect Channel State Informati on Batu ... impractical if the design is based on instantaneous channels [23]. Therefore, robust designs based on channel covariance information [20] can be appropriate for such...

Ngày tải lên: 21/06/2014, 08:20

... parameter estimation in (19) is in block form, which is not suitable for real- time design in the MC-CDMA communication systems. A recursive parameter estimation for (19)andanestimatefor noise ... complicated. But only an algorithm is needed for the channel estimation, no matter how many subchannels the MC-CDMA system has. However, the channel- parameter estimation in the time...

Ngày tải lên: 21/06/2014, 08:20

... convenience of the reader. ThePUchannelisW p Hz wide and the bandwidth of each OFDM subchannel is W s Hz. On either side of the PU channel, there are N/2 OFDM subchannels. The BS has only partial ... Resource allocation algorithms for MU -OFDM systems have been studied in [11–14]. These algorithms are designed for non-CR MU -OFDM systems in which there are no PUs. In an MU -OFDM C...

Ngày tải lên: 21/06/2014, 11:20

... transmission strategies, namely, amplify-forward (AF), hybrid decode amplify forward (HLC), hybrid decode amplify forward (HMC), decode forward (DF), and partial decode forward (PDF) , are proposed. Their designs ... C 2  ( H B ) T  N B pdf  −1 H B K R  , (59) R B ≤ C 2   H B pdf  T  N A pdf  −1 H B pdf K B  , (60) where N i pdf   ζ 2 1 h i1 h T i1 + ζ 2 2 h i2 h T i2 +...

Ngày tải lên: 21/06/2014, 17:20

... performs well for values of N ≥ 1000 and is comparable to the Wiener equalizer for N = 2000. For performance comparison with the constant modulus algorithm, we use the BERGulator software for ... interference (ISI) formula defined in terms of the global channel- equalizer taps as ISI = (  i |g i | 2 ) −|g| 2 max |g| 2 max ,(3) where |g| max stands for the maximum joint channel- e...

Ngày tải lên: 21/06/2014, 22:20

... to generate a correct equalizer for a channel with colored input. Since the estimation of  h and the proof of (18)donotrequirewhite input, the estimation of the channel will not be affected by colored ... equalizer achieves a performance close to the trained MMSE equalizer for channels with white inputs at high SNR. The introduced Tsatsanis and Xu’s (TX’s) CMOV algorithm obtains t...

Ngày tải lên: 21/06/2014, 22:20

... four talkers. 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 localization accuracy is improved. We can expect that the GMM for the acoustic transfer function is effective for carrying out...

Ngày tải lên: 21/06/2014, 22:20