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    • 5. 发明申请
    • Method and apparatus for packet wireless telecommunications
    • 分组无线电信的方法和装置
    • US20080267157A1
    • 2008-10-30
    • US11796853
    • 2007-04-30
    • Jung Ah LeeSaid TateshHai Zhou
    • Jung Ah LeeSaid TateshHai Zhou
    • H04B7/216
    • H04L27/2602H04L1/0006H04L1/1812H04L27/2626H04L27/2647
    • In a wireless telecommunications network, a Code Division Multiple Access (CDMA) scheme is applied to data to encode it. The encoded data transmitted in the uplink using an Orthogonal Frequency Division Multiplexing (OFDM) frame structure including a cyclic prefix (CP). The CDMA encoded data may be time multiplexed with Single Carrier-Frequency Division Multiple Access (SC-FDMA) transmissions. The CDMA transmissions may be used for relatively small payloads, such as those associated with voice traffic and control signals, and the SC-FDMA transmissions used for higher date rate transmissions. This enables autonomous transmission, without scheduling, for smaller payloads. A transmitter includes a selector 3 for performing time multiplexing in the uplink, the required mode being indicated by the Hybrid Automatic Repeat Request (HARQ) ID. A first branch 1 carries SC-FDMA data and a second branch 2 carries data to be transmitted as a CDMA scheme. A CAZAC code may be used in encoding the CDMA data.
    • 在无线电信网络中,将码分多址(CDMA)方案应用于数据进行编码。 使用包括循环前缀(CP)的正交频分复用(OFDM)帧结构在上行链路中发送的编码数据。 CDMA编码数据可以与单载波频分多址(SC-FDMA)传输进行时间复用。 CDMA传输可以用于相对小的有效载荷,例如与语音业务和控制信号相关联的那些,以及用于较高日期传输的SC-FDMA传输。 这使得能够进行自主传输,而无需调度,可以实现更小的有效载荷。 发射机包括用于在上行链路中执行时间复用的选择器3,所需模式由混合自动重传请求(HARQ)ID指示。 第一分支1携带SC-FDMA数据,第二分支2携带要作为CDMA方案发送的数据。 可以在编码CDMA数据时使用CAZAC码。
    • 6. 发明申请
    • RACH transmitter and receiver and method thereof
    • RACH发射机和接收机及其方法
    • US20080080461A1
    • 2008-04-03
    • US11540853
    • 2006-09-29
    • Jung Ah Lee
    • Jung Ah Lee
    • H04B7/216
    • H04B7/2637H04L5/0007H04L5/0048H04L5/0053H04L27/2613H04L27/2655H04L27/2675H04W74/0866
    • Disclosed is a method of, and apparatus for, processing a Random Access Channel (RACH) burst comprising a processed preamble group having at least two processed preambles. The processed preambles may be derived from short preambles, i.e., preamble comprising less than 887 bits, such that the RACH burst may be detected over shorter coherent accumulation time intervals relative to prior art coherent accumulation time intervals, thereby improving RACH burst detection. A transmitter generates a RACH burst comprising two or more processed preambles and transmits the RACH burst to a receiver. The receiver processes the RACH burst by correlating the two or more processed preambles to a plurality of reference signals in a frequency domain to produce a set of two or more frequency domain correlated outputs for each of the plurality of reference signals. The RACH burst is then detected based on energy associated with at least one frequency domain correlated output in the set of two or more frequency domain correlated outputs to a threshold energy value.
    • 公开了一种处理随机接入信道(RACH)突发的方法和装置,其包括具有至少两个经处理的前同步码的经处理的前同步码组。 经处理的前导码可以从短前导码导出,即包含少于887位的前同步码,使得相对于现有技术的相干累积时间间隔,可以在较短的相干累积时间间隔内检测到RACH脉冲串,从而改善了RACH脉冲串检测。 发射机产生包括两个或多个经处理的前同步码的RACH脉冲串,并将RACH脉冲串发射到接收机。 接收机通过将两个或更多个经处理的前导码与频域中的多个参考信号相关联来处理RACH突发,以产生用于多个参考信号中的每一个的两个或多个频域相关输出的集合。 然后基于与两个或多个频域相关输出的集合中的至少一个频域相关输出相关联的能量到阈值能量值来检测RACH突发。