Báo cáo hóa học: " Research Article Stable Transmission in the Time-Varying MIMO Broadcast Channel" pptx

... Corporation EURASIP Journal on Advances in Signal Processing Volume 2008, Article ID 617020, 14 pages doi:10.1155/2008/617020 Research Article Stable Transmission in the Time-Varying MIMO Broadcast Channel Adam ... suggests that the beam- forming weights produced by the MMSE-CDIT algorithm reside in stable subspaces within the multiuser time-varying MIMO ch...

Ngày tải lên: 22/06/2014, 00:20

... provided later in this section. Based on the distribution of the interference terms, the approximation for the achievable rate for the MU mode is given in the following theorem. Theorem 4. The ergodic ... mode switching points in Ta ble 2. For the ZF system, it is the second switching point; for the MMSE system, it is the only switching point. We see that the swi...

Ngày tải lên: 21/06/2014, 20:20

... and N r = 2. Therefore, in PFS, choosing the users without consider- ing the problem of the mode selection (dominant-mode transmission) seems to be the relevant strategy, at least in the chosen ... We consider the downlink transmission. The following are the keyassumptionsmadeinthispaper. Assumption 1. All the B cooperating BSs are interconnected via a central unit wit...

Ngày tải lên: 21/06/2014, 09:20

... R, (11) where r is the segment index and R denotes the number of segments within the frame (the number of data blocks in each frame is N B = N s × R). Substituting (9) into (11), bear- ing in mind that ... involved in the estimation of the DOAs which makes this problem much more challenging than in single- user transmissions. The solution we propose allows estimating the...

Ngày tải lên: 22/06/2014, 19:20

... evaluation: in (14)and(15), the integrand involves the fusion rule that is a highly nonlinear function of the CSI g, making the integration formidable. The only pos- sible way of finding the optimal ... 3 We point out here that integrating the transmission channels into the fusion rule design has been investigated be- fore [ 14, 15]. The optimal fusion rule in the Bay...

Ngày tải lên: 22/06/2014, 22:20

... the nodes in the duplication set, which incidentally includes n, the node being synthesized. The main loop in restructure (lines (4)–(9)) maintains two invariants. First, each fork maintains its ... always reaches the join of an inner fork before reaching a join of an outer fork. Together, join nodes the inverted triangles in Figure 1(b)— and their predecessors, terminate nod...

Ngày tải lên: 22/06/2014, 22:20

... Some of the obtained results extend the contraction principle to the use of altering-distance functions and extended altering-distance functions, the last ones being piecewise continuous. The conditions ... extensions in the context of fixed-point theory have been investigated in 11–13. Further extended viscosity iteration schemes with nonexpansive mappings based on the abo...

Ngày tải lên: 21/06/2014, 11:20

... allocate the transmit power considering the CCI mitigation in a joint manner. The main goal is to allocate the transmit power to reduce the CCI while maximizing the achievable rate of the relay link. Suppose ... [45]. Then, our system can be converted into a concatenated MIMO system comprising single-relay MIMO channel for the first hop and MIMO broadcast channels (M...

Ngày tải lên: 21/06/2014, 17:20

... coding is used to improve the quality in specific regions of interest only by applying lossless or low compression in these regions, maintaining the high compression in regions of noninterest. The ... transmitted in the simulated network in order to fill in the respective WiMAX class capacity in the link. The back- ground traffic is increased from 210 Kbps to 768 Kbps...

Ngày tải lên: 22/06/2014, 19:20

... considering the MC-CDMA technique, the perfor- mance results are given by taking into account the loss in power (10 log 10 (T 0 /(T 0 +CP) = 0.63 dB) induces by the cyclic prefix insertion. For the ... PROPERTY OF W-H CODES Using again the notations introduced in Appendix A and in Section 4, we are going to show that for 0 <s<2 n − 1, the W-H codes satisfy the follo...

Ngày tải lên: 22/06/2014, 19:20