-
公开(公告)号：US20140140423A1
公开(公告)日：2014-05-22
申请号：US14170111
申请日：2014-01-31
Inventor： Karthik MURALIDHAR , George A. VLANTIS
CPC classification number: H04L25/03821 , H04B7/0413 , H04L5/0048 , H04L25/0204 , H04L25/022 , H04L25/0226 , H04L27/2601
Abstract: In an embodiment, a transmitter includes a transmission path configurable to generate first pilot clusters in response to a matrix, each first pilot cluster including a respective first pilot subsymbol in a first cluster position and a respective second pilot subsymbol in a second cluster position such that a vector formed by the first pilot subsymbols is orthogonal to a vector formed by the second pilot subsymbols, the matrix having a dimension related to a number of cluster positions in each of the first pilot clusters. For example, where such a transmitter transmits simultaneous orthogonal-frequency-division-multiplexed (OFDM) signals (e.g., MIMO-OFDM signals) over respective channels that may impart inter-carrier interference (ICI) to the signals due to Doppler spread, the pattern of the pilot symbols that compose the pilot clusters may allow a receiver of these signals to estimate the responses of these channels more accurately than conventional receivers.
Abstract translation: 在实施例中，发射机包括可配置为响应于矩阵生成第一导频簇的传输路径，每个第一导频簇包括第一簇位置中的相应第一导频子符号和第二簇位置中的相应第二导频子符号，使得 由第一导频子符号形成的矢量与由第二导频子符号形成的矢量正交，该矩阵具有与每个第一导频簇中的簇的位置数相关的维数。 例如，在这种发射机通过可能由于多普勒扩展而给予信号的载波间干扰（ICI）的相应信道上发射同时正交频分复用（OFDM）信号（例如，MIMO-OFDM信号）的情况下， 构成导频簇的导频符号的模式可以允许这些信号的接收机比常规接收机更准确地估计这些信道的响应。
-
公开(公告)号：US20170086139A1
公开(公告)日：2017-03-23
申请号：US15365600
申请日：2016-11-30
Applicant: STMICROELECTRONICS, INC.
Inventor： Liwen CHU , George A. VLANTIS
CPC classification number: H04W52/0209 , H04W8/22 , H04W52/0206 , H04W52/0216 , H04W52/0222 , H04W52/0229 , H04W84/12 , H04W88/02 , H04W88/08 , Y02D70/00 , Y02D70/142
Abstract: A IEEE 802.11 Wireless Local Area Network (WLAN) system of an access point (AP) and one or more stations (STAs) reduces power consumption and increases battery life of power efficient low power STAs by decreasing the amount of time that a power efficient low power STA remains in an awake state. After indicating power efficient low power operation during association with an AP supporting such operation, the power efficient low power STA may enter the doze state from the time that the power efficient low power STA sends a PS-Poll until the power efficient low power STA receives the buffered DATA frame from the AP. While implementing the power efficient PS-Poll method, the AP can send the buffered DATA frame to the STA SIFS after the AP sends an ACK to the received PS-Poll from the STA.
-
公开(公告)号：US20180070305A1
公开(公告)日：2018-03-08
申请号：US15808592
申请日：2017-11-09
Applicant: STMICROELECTRONICS, INC.
Inventor： Liwen CHU , George A. VLANTIS
CPC classification number: H04W52/0209 , H04W8/22 , H04W52/0206 , H04W52/0216 , H04W52/0222 , H04W52/0229 , H04W84/12 , H04W88/02 , H04W88/08 , Y02D70/00 , Y02D70/142
Abstract: A IEEE 802.11 Wireless Local Area Network (WLAN) system of an access point (AP) and one or more stations (STAs) reduces power consumption and increases battery life of power efficient low power STAs by decreasing the amount of time that a power efficient low power STA remains in an awake state. After indicating power efficient low power operation during association with an AP supporting such operation, the power efficient low power STA may enter the doze state from the time that the power efficient low power STA sends a PS-Poll until the power efficient low power STA receives the buffered DATA frame from the AP. While implementing the power efficient PS-Poll method, the AP can send the buffered DATA frame to the STA SIFS after the AP sends an ACK to the received PS-Poll from the STA.
-
-
Search Results
3
records
(took 0.012 seconds)
