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    • 71. 发明申请
    • HOST PROCESSOR ASSISTED FAST RE-SYNCHRONIZATION TECHNIQUES FOR DVB-H SYSTEMS
    • 主机处理器辅助DVB-H系统的快速重新同步技术
    • US20080151799A1
    • 2008-06-26
    • US11615292
    • 2006-12-22
    • Nabil R. YousefJun MaChaoliang T. Chen
    • Nabil R. YousefJun MaChaoliang T. Chen
    • G08C17/00
    • H04N21/443H04H20/426H04N21/4382H04N21/4436H04N21/64315
    • A system and method of performing re-synchronization for a Digital Video Broadcasting over Handheld (DVB-H) receiver, wherein the method comprises performing a time division multiplexing (TDM) data burst transmission sequence on bits of data received by the DVB-H receiver; performing a data bit re-synchronization sequence on the DVB-H receiver; removing an on-chip timer and internal state registers in the DVB-H receiver; and allowing the DVB-H receiver to power off in between receipt of data bursts. Preferably, the removing process reduces the time to perform the re-synchronization in the DVB-H receiver. Preferably, the data bit re-synchronization sequence comprises performing an automatic gain control (AGC) lock process; performing a model and guard detecting process; performing a frequency offset estimation process; performing a transmit parameter signaling (TPS) detection process; performing a timing and carrier loop lock process; and performing an equalizer delay process.
    • 一种用于对手持式数字视频广播(DVB-H)接收机执行重新同步的系统和方法,其中所述方法包括对由DVB-H接收机接收的数据位执行时分复用(TDM)数据脉冲串传输序列 ; 在DVB-H接收机上执行数据比特重新同步序列; 去除DVB-H接收机中的片上定时器和内部状态寄存器; 并允许DVB-H接收机在接收到数据脉冲串之间断电。 优选地,去除过程减少了在DVB-H接收机中执行重新同步的时间。 优选地,数据比特重新同步序列包括执行自动增益控制(AGC)锁定过程; 执行模型和保护检测过程; 执行频偏估计处理; 执行传输参数信令(TPS)检测过程; 执行定时和载波循环锁定过程; 并执行均衡器延迟处理。
    • 73. 发明授权
    • Iterative data-aided carrier frequency offset estimation for code division multiple access systems
    • 用于码分多址系统的迭代数据辅助载频偏移估计
    • US07308053B2
    • 2007-12-11
    • US11592286
    • 2006-11-02
    • Nabil R. YousefJun MaJonathan S. Min
    • Nabil R. YousefJun MaJonathan S. Min
    • H04L27/06
    • H04B1/707H04B2201/70701H04L2027/0055
    • Iterative data-aided carrier CFO estimation for CDMA systems. Any communication receiver may be adapted to perform the iterative data-aided carrier CFO estimation. The iterative data-aided carrier CFO estimation is performed using a high accuracy method. The operation may be described as follows: a received signal is despread and buffered. Using the received preamble sequence, an initial estimate of the CFO is obtained. This estimate is used to correct the whole despread data. The corrected data using the initial CFO estimate is sliced. Each despread data symbol is divided by the corresponding sliced data decision. The obtained sequence is then averaged across different codes to obtain a less noisy sequence, which is then used to estimate the CFO again. The procedure can be repeated (iterated) to obtain a more accurate carrier frequency offset estimate; the number of times in which the procedure is repeated may be programmable or predetermined.
    • CDMA系统的迭代数据辅助载波CFO估计。 任何通信接收机可以适于执行迭代数据辅助载波CFO估计。 使用高精度方法进行迭代数据辅助载波CFO估计。 该操作可以描述如下:接收信号被解扩和缓冲。 使用接收到的前导序列,获得CFO的初始估计。 该估计用于校正整个解扩数据。 使用初始CFO估计的校正数据被切片。 每个解扩数据符号被相应的切片数据判定划分。 然后将获得的序列在不同的代码之间进行平均,以获得较少的噪声序列,然后将其用于再次估计CFO。 可以重复(迭代)该过程以获得更准确的载波频率偏移估计; 重复该过程的次数可以是可编程的或预定的。