Zobrazeno 1 - 7
of 7
pro vyhledávání: '"YANG Lv-xi"'
Publikováno v:
Tongxin xuebao, Vol 32, Pp 61-67 (2011)
In order to reduce the amount of information exchange between base stations（BS） and user feedback information required by multicell cooperative beamforming systems,an estimation algorithm of channel vector function was proposed by making jointly
Externí odkaz:
https://doaj.org/article/b24e2166deea4f97a1e3d52e321df4f9
Publikováno v:
Tongxin xuebao, Vol 32, Pp 45-52 (2011)
The realization scheme in the distributed manner was researched for the cooperation transmission of the multi-ple two-way relays,moreover the performance analysis of the asymptotic optimality was also presented.First of all,an upper-bound function wa
Externí odkaz:
https://doaj.org/article/9297690b60d04b0694d7c592abce1eaf
Publikováno v:
Tongxin xuebao, Vol 31, Pp 15-23 (2010)
Cross-layer scheduling and dynamic resource allocation problems were investigated for downlink MIMO-OFDMA/SDMA systems with multi-service.Firstly,a mathematical formulation of the optimization problem was provided with the objective of maximizing the
Externí odkaz:
https://doaj.org/article/2c917d1f99b841bbbb6200b27a612d26
Autor:
YU Fei, YANG Lv-xi
Publikováno v:
Tongxin xuebao, Vol 31, Pp 45-53 (2010)
Based on the capacity of multi-access channel,a relay selection algorithm was proposed.It was proposed that: relays were selected according to the eigenvalue decomposition of the equivalent relay-destination channel,and the beamforming vectors were d
Externí odkaz:
https://doaj.org/article/59d2314db18f4f96a454c32e70655d00
Autor:
XU Dao-feng, YANG Lv-xi
Publikováno v:
Tongxin xuebao, Vol 30, Pp 35-41 (2009)
Concerning the access terminals （AT） use single antenna to transmit, two precoding methods were proposed for TDD systems that combined instantaneous CSI and statistical CSI effectively. When without feedback, instant perfect CSI was utilized to t
Externí odkaz:
https://doaj.org/article/a61c93f114bb4c33a63c04f375b6e25f
Publikováno v:
Tongxin xuebao, Vol 30, Pp 62-69 (2009)
A low cost, real-time feedback method for downlink channel state information （DL-CSI） was proposed. DL-CSI was superimposed with uplink user sequences （UL-US） before transmission and thus exclusive occupation of system resources could be avoi
Externí odkaz:
https://doaj.org/article/33fa99b575de4fd3aa578b8b2f9e2f97
Autor:
HUANG Yong-ming, YANG Lv-xi
Publikováno v:
Tongxin xuebao, Pp 129-134 (2006)
A simple and efficient combining scheme was proposed for MIMO-OFDM system, which jointly designed space time block codes and multi-dimension eigen-beamforming according to second-order statistics of channels. The proposed scheme would achieve the max
Externí odkaz:
https://doaj.org/article/0a89e3e61fe84a688f9c148f8f017269