公开(公告)号：US20140016691A1

公开(公告)日：2014-01-16

申请号：US13942438

申请日：2013-07-15

Applicant: Rambus Inc.

Inventor： Aykut Bultan

IPC: H04B1/12 ,  H04L25/03

CPC classification number: H04B1/123 ,  H04L25/03305 ,  H04L25/03885

Abstract: Systems and methods are disclosed for interference suppression in a mobile device (MS). In certain embodiments, the MS uses handover measurements to detect and measure the interference powers of neighbor cells and sorts them with respect to their power levels. An RSRP ratio of serving cell RSRP to neighbor cell RSRP may be used to determine the interference power levels of the neighbor cells. Alternately, RSRQ may be used to determine the interference power levels of the neighbor cells. The MS may estimate the interference of each cell with an interference power level above a certain threshold and then subtract each interference estimate from the total received signal until all the selected interferers are suppressed. In certain embodiments, the interference suppressed signal may then be equalized and/or decoded. Equalization may occur during suppression of interference from individual neighbor cells or after all neighbor cell interference estimates have been subtracted.

Abstract translation: 公开了用于移动设备（MS）中的干扰抑制的系统和方法。 在某些实施例中，MS使用切换测量来检测和测量相邻小区的干扰功率并且相对于它们的功率电平进行排序。 可以使用服务小区RSRP到相邻小区RSRP的RSRP比来确定相邻小区的干扰功率水平。 或者，RSRQ可以用于确定相邻小区的干扰功率电平。 MS可以估计具有高于某一阈值的干扰功率电平的每个小区的干扰，然后从总接收信号中减去每个干扰估计，直到所有所选择的干扰源被抑制为止。 在某些实施例中，干扰抑制信号可以被均衡和/或解码。 在抑制来自各个相邻小区的干扰或者在减去所有相邻小区干扰估计之后，可能发生均衡。

公开(公告)号：US20140323054A1

公开(公告)日：2014-10-30

申请号：US14364002

申请日：2012-12-20

Applicant: RAMBUS INC.

Inventor： Farshid Aryanfar ,  Carl W. Werner ,  Aykut Bultan

IPC: H04B7/005

CPC classification number: H04B7/005 ,  H04L25/0204

Abstract: The disclosed embodiments relate to a system that performs channel-sounding operations in a multi-antenna wireless communication system. During operation, the system first performs channel-sounding operations between a first client and a second client in a first frequency band. These channel-sounding operations involve transmitting a series of known tones between the first client and the second client and using signals received as a result of the transmissions to finds a strongest path between the first client and the second client. Next, the system uses the identified strongest path to improve channel-sounding operations in a second frequency band.

Abstract translation: 所公开的实施例涉及在多天线无线通信系统中执行信道探测操作的系统。 在操作期间，系统首先在第一频带中在第一客户端和第二客户端之间执行信道探测操作。 这些信道探测操作涉及在第一客户机和第二客户端之间传送一系列已知的音调，并使用作为传输结果而接收的信号，以在第一客户机和第二客户机之间找到最强的路径。 接下来，系统使用所识别的最强路径来改善第二频带中的频道探测操作。

公开(公告)号：US20130265900A1

公开(公告)日：2013-10-10

申请号：US13859764

申请日：2013-04-10

Applicant: RAMBUS INC.

Inventor： Aykut Bultan

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/0417 ,  H04B7/061 ,  H04B7/0691

Abstract: The disclosed embodiments relate to a system that facilitates antenna selection and pilot reduction in a multi-antenna system. During operation, in response to an activating event, the system performs a full pilot transmission by transmitting pilot signals through all available transmit antennas at a base station. The system then determines the selected subset of transmit antennas by receiving lists of selected antennas from mobile stations associated with preferred users, wherein a given mobile station selects a list of antennas in response to pilot signals received during the full pilot transmission. The system then combines the received lists to produce the selected subset, wherein the selected subset includes all antennas which appear in the received lists of selected antennas. Next, during normal system operation, the system periodically performs a selected pilot transmission by transmitting pilot signals through a selected subset of the available transmit antennas.

Abstract translation: 所公开的实施例涉及在多天线系统中促进天线选择和导频减少的系统。 在操作期间，响应于激活事件，系统通过在基站处通过所有可用发射天线发射导频信号来执行全导频传输。 然后，系统通过从与优选用户相关联的移动站接收所选择的天线的列表来确定所选择的发射天线的子集，其中给定的移动台响应于在全导频传输期间接收到的导频信号来选择天线列表。 然后，系统组合接收的列表以产生所选择的子集，其中所选择的子集包括出现在所选天线的接收列表中的所有天线。 接下来，在正常的系统操作期间，系统通过经由所选择的可用发射天线的子集发送导频信号来周期性地执行选择的导频传输。