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    • 17. 发明申请
    • PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION
    • 改进信道和干扰估计的导频设计
    • WO2008086110A3
    • 2008-09-25
    • PCT/US2008050136
    • 2008-01-03
    • QUALCOMM INCBUDIANU PETRU CRISTIANGORE DHANANJAY ASHOKGOROKHOV ALEXEI
    • BUDIANU PETRU CRISTIANGORE DHANANJAY ASHOKGOROKHOV ALEXEI
    • H04L27/26
    • H04L25/0202H04L5/0023H04L5/0048
    • Techniques for transmitting pilot and for processing received pilot to obtain channel and interference estimates are described. A terminal may generate pilot symbols for a first cluster in a time frequency block based on a first sequence and may generate pilot symbols for a second cluster in the time frequency block based on a second sequence. The first and second sequences may include common elements arranged in different orders and may be considered as different versions of a single sequence. The terminal may transmit the pilot symbols in their respective clusters. A base station may obtain received pilot symbols from multiple clusters in the time frequency block. The base station may form each of multiple basis vectors with multiple versions of the sequence assigned to the terminal and may process the received pilot symbols with the multiple basis vectors to obtain a channel estimate for the terminal.
    • 描述了用于传送导频和用于处理收到的导频以获得信道和干扰估计的技术。 终端可以基于第一序列生成时间频率块中的第一聚类的导频符号,并且可以基于第二序列生成时间频率块中的第二聚类的导频符号。 第一和第二序列可以包括以不同顺序排列的公共元素,并且可以被认为是单个序列的不同版本。 终端可以在其各自的簇中发送导频符号。 基站可以从时间频率块中的多个聚类中获得接收到的导频符号。 基站可以形成具有分配给终端的多个版本的序列的多个基本向量中的每一个,并且可以利用多个基本向量处理接收到的导频符号以获得终端的信道估计。
    • 20. 发明申请
    • SHARED SIGNALING CHANNEL
    • 共享信令信道
    • WO2007051159A3
    • 2007-06-14
    • PCT/US2006060292
    • 2006-10-27
    • QUALCOMM INCKHANDEKAR AAMODGOROKHOV ALEXEIGORE DHANANJAY ASHOKTEAGUE EDWARD HARRISONDONG MIN
    • KHANDEKAR AAMODGOROKHOV ALEXEIGORE DHANANJAY ASHOKTEAGUE EDWARD HARRISONDONG MIN
    • H04Q7/38H04L27/26
    • H04L5/0044H04L5/0007H04L5/0048H04L5/0053
    • A shared signaling channel can be used in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system to provide signaling, acknowledgement, and power control messages to access terminals within the system. The shared signaling channel can be assigned to a predetermined number of sub-carriers within any frame. The assignment of a predetermined number of sub-carriers to the shared signaling channel establishes a fixed bandwidth overhead for the channel. The actual sub-carriers assigned to the channel can be varied periodically, and can vary according to a predetermined frequency hopping schedule. The amount of signal power allocated to the signaling channel can vary on a per symbol basis depending on the power requirements of the communication link. The shared signaling channel can direct each message carried on the channel to one or more access terminals. Unicast messages allow the channel power to be controlled per the needs of individual communication links.
    • 共享信令信道可用于正交频分多址(OFDMA)通信系统中,以向系统内的接入终端提供信令,确认和功率控制消息。 共享信令信道可以被分配给任何帧内的预定数量的子载波。 将预定数量的子载波分配给共享信令信道为该信道建立固定的带宽开销。 分配给信道的实际子载波可以周期性地变化,并且可以根据预定的跳频时间表而变化。 根据通信链路的功率需求,分配给信令信道的信号功率的量可以根据每个符号而变化。 共享信令信道可以将信道上承载的每个消息引导到一个或多个接入终端。 单播消息允许按照各个通信链路的需要来控制信道功率。