Báo cáo hóa học: " Research Article MAP Channel-Estimation-Based PIC Receiver for Downlink MC-CDMA Systems" docx

... two receiver chains: the main receiver and the DSR. With two available receivers, one would share the load across the two receivers. One can also expand this concept from 2 receivers to M receivers ... power, performance, and so forth. For example, the total time to perform a DFT in (3) is inversely proportional to the speed of operation of the DSP. A brute force approach would be for...

Ngày tải lên: 21/06/2014, 20:20

... 16-QAM are used for signaling with Gray mapping. With 4-QAM modulation, in Figures 1 and 2, for channel matrices of size 2 × 4and3× 4, respectively, we show simulation results of BER for various ... floating point operation (flops). For a block fading channel, assume that the channel is not varying for a duration of W symbol vectors transmitted. Note that PVS is only performed once f...

Ngày tải lên: 21/06/2014, 11:20

... total number of the encoded frames is 100 for each test sequence. Hadamard transform is enforced on these video frames. 8 ×8 transform is not chosen. As for the entropy coding, the CAVLC (context-based ... substitute for H.264 DC intraprediction mode with no need to code side information. However, prediction performance would be degraded if directly using previously reconstructed pixels...

Ngày tải lên: 21/06/2014, 22:20

... Mancas-Thillou et al. 5 two pictures left which correspond depending on the ini- tial image to either two foreground pictures or one fore- ground picture and one noise picture. We may consider com- bining ... illumi- nation, zoom factor, and so forth. However, this fact that seems so obvious for most of people is not natural and easy for blind people. For them, taking a picture requires...

Ngày tải lên: 22/06/2014, 19:20

... =∅; (4) for every n ∈ U P used n =  k∈S p n k ; if P used n = P n  U =  U + {n}; for every k ∈ S if p n k > 0,  S =  S + {k}; end for end if end for (5) U = U −  U; S = S −  S; (6) for ... performance of 3000 ft lines on the high-frequency band. Therefore, for 1500 ft lines, allocating all the remain- ing power over the high-frequency band is a smart strategy to enhance...

Ngày tải lên: 22/06/2014, 20:20

... systems Storage facility Financial institution Basic commercial vehicle Basic vehicle Payment Payment request Route request Route information Transit schedules Transit requests Vehicle status Traffic Incident notification Incident notification Route information Route information Priority request Figure 1: Article ... Wireless Communications and Networking Volume 2009, Article ID 267283, 1...

Ngày tải lên: 23/06/2014, 00:20

... Communications and Networking Volume 2008, Article ID 570624, 9 pages doi:10.1155/2008/570624 Research Article MAP Channel-Estimation-Based PIC Receiver for Downlink MC-CDMA Systems Hakan Do ˘ gan, 1 Erdal ... an efficient EM -MAP channel-estimation-based PIC receiver structure for down- link MC-CDMA systems. This algorithm performs an itera- tive estimation of th...

Ngày tải lên: 22/06/2014, 19:20

... he researched for his Dipl Ing. thesis at the Communication Science Laboratories, Research and Devel- opment Division of Nippon Telegraph and Telephone Corporation (NTT), Kyoto, Japan. His topic ... maximum a posteriori (MAP) estimation, assuming statistical independence and Laplacian PDFs for the sources. 4.1. MAP- based cost function Using a maximum a posteriori (MAP) approach, we h...

Ngày tải lên: 22/06/2014, 23:20

... the same for the uniform power delay profile and some exponential po wer delay profiles we tested. Hence, a common optimal Chu sequence can be used forbothchannelPDP’s.ThisisnotthecasefortheS&H sequences. Figure ... arameter. For multiuser MIMO-OFDM systems, each user has its own LO, while the multiple antennas at the base-station (receiver) are driven by a centralized LO. Therefore, in...

Ngày tải lên: 21/06/2014, 05:20

... s 1 [m 2 ] (for 2 )ors 2 [n 1 ] ⊕ s 2 [m 2 ] (for 3 ). (e.g., s 1 [3] ⊕ s 1 [5] in the above example) (4) For the remaining lost packets at D 1 and D 2 that R receives successfully but cannot perform the ... information to destination without relaying technique. RT protocol represents the model where relay participates in the transmission but NC is not performed at the relay (e.g., decode...

Ngày tải lên: 21/06/2014, 05:20