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    • 8. 发明申请
    • DUAL-STAGE ECHO CANCELLATION IN A WIRELESS REPEATER USING AN INSERTED PILOT
    • 使用插入式引导器在无线中继器中进行双级ECHO取消
    • WO2010132455A3
    • 2011-03-24
    • PCT/US2010034394
    • 2010-05-11
    • QUALCOMM INCBLACK PETER JOHNGORE DHANANJAY ASHOKBARRIAC GWENDOLYN DENISE
    • BLACK PETER JOHNGORE DHANANJAY ASHOKBARRIAC GWENDOLYN DENISE
    • H04B7/155H04B17/40
    • H04B7/15535H04B7/15585H04L27/2607H04L27/2613
    • In one embodiment, a method for providing echo cancellation in a wireless repeater includes: adding the pilot signal to a transmit signal; receiving a receive signal being the sum of a remote signal, a feedback pilot signal and a feedback transmit signal; cancelling the feedback transmit signal from the receive signal using a currently available feedback channel estimate and generating a first echo cancelled signal; generating an updated feedback channel estimate using the first echo cancelled signal and the pilot signal as a reference signal; cancelling the feedback transmit signal and the feedback pilot signal from the receive signal using the updated feedback channel estimate and generating a second echo cancelled signal; and amplifying the second echo cancelled signal as the transmit signal. In another embodiment, the feedback pilot signal is cancelled from the first echo cancelled signal using the updated feedback channel estimate to generate the second echo cancelled signal.
    • 在一个实施例中,一种用于在无线中继器中提供回波消除的方法包括:将导频信号添加到发射信号; 接收作为远程信号,反馈导频信号和反馈发送信号之和的接收信号; 使用当前可用的反馈信道估计从所述接收信号中消除所述反馈发射信号并产生第一回波消除信号; 使用所述第一回波消除信号和所述导频信号作为参考信号产生更新的反馈信道估计; 使用更新的反馈信道估计从接收信号中消除反馈发射信号和反馈导频信号,并产生第二回波消除信号; 并且将第二回波消除信号放大为发送信号。 在另一个实施例中,使用更新的反馈信道估计从第一回波消除信号中消除反馈导频信号以产生第二回波消除信号。
    • 9. 发明申请
    • PACKET TRANSMISSION VIA MULTIPLE LINKS IN A WIRELESS COMMUNICATION SYSTEM
    • 通过无线通信系统中的多个链路传输分组
    • WO2009099921A2
    • 2009-08-13
    • PCT/US2009032554
    • 2009-01-30
    • QUALCOMM INCBLACK PETER JOHNREZAIIFAR RAMIN
    • BLACK PETER JOHNREZAIIFAR RAMIN
    • H04L12/56
    • H04L1/1607H04L1/0001H04L1/1812H04L1/1854H04L1/1874H04L1/1887H04L5/0007H04L5/0044H04L5/0053H04L25/14H04L47/10H04L2001/0096
    • Techniques for generating and transmitting packets on multiple links in a wireless communication system are described. In one aspect, a transmitter generates new packets for the multiple links based on the likelihood of each link being available. The transmitter determines the likelihood of each carrier being available based on whether or not there is a pending packet on that carrier and, if yes, the number of subpackets sent for the pending packet. The transmitter generates new packets such that packets for links progressively less likely to be available contain data units with progressively higher sequence numbers. The transmitter determines whether each link is available and sends a packet on each link that is available. In another aspect, the transmitter generates and sends new packets in a manner to ensure in-order transmission. In one design, the transmitter generates new packets for each possible combination of links that might be available.
    • 描述了用于在无线通信系统中的多个链路上产生和发送分组的技术。 在一个方面,发射机基于每个链路可用的可能性为多个链路生成新的分组。 发射机基于该载波上是否存在未决分组来确定每个载波可用的可能性,并且如果是,则确定为未决分组发送的子分组的数目。 发送器产生新的分组,使得链路的分组逐渐不太可能包含具有逐渐更高的序列号的数据单元。 发射机确定每个链路是否可用,并在每个可用链路上发送分组。 另一方面,发射机以确保有序传输的方式产生并发送新的分组。 在一种设计中,发射机为可能可用的每个可能的链路组合生成新的分组。