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公开(公告)号：US20070002728A1
公开(公告)日：2007-01-04
申请号：US11452412
申请日：2006-06-14
IPC分类号： H04J11/00
CPC分类号： H04L25/0206 , H04L25/0212 , H04L27/2662 , H04L27/2675 , H04L27/2676 , H04L27/2695 , H04W56/0065
摘要： An OFDM receiver includes a timing error detection unit that determines error information based on a difference between receiving timing of a desired signal from a counterpart transmitter and receiving timing of an undesired signal from a non-counterpart transmitter. The timing error detection unit includes a pilot signal detection unit configured to detect a pilot signal of the desired signal and a pilot signal of the undesired signal from an FFT-processed received signal; a first converting unit configured to convert a frequency-domain channel estimate derived from the pilot signal of the desired signal to a first time-domain channel impulse response; a second converting unit configured to convert a frequency-domain channel estimate derived from the pilot signal of the undesired signal to a second time-domain channel impulse response; and an error information determination unit configured to determine the error information based on the first and second channel impulse responses.
摘要翻译： OFDM接收机包括定时误差检测单元，该定时误差检测单元基于来自对方发射机的期望信号的接收定时之间的差异以及来自非对应发射机的非期望信号的定时来确定误差信息。 定时误差检测单元包括导频信号检测单元，被配置为从FFT处理的接收信号中检测所需信号的导频信号和不需要信号的导频信号; 第一转换单元，被配置为将从期望信号的导频信号导出的频域信道估计转换为第一时域信道脉冲响应; 第二转换单元，被配置为将从所述不期望信号的导频信号导出的频域信道估计转换为第二时域信道脉冲响应; 以及错误信息确定单元，被配置为基于所述第一和第二信道脉冲响应来确定所述错误信息。
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公开(公告)号：US20060209746A1
公开(公告)日：2006-09-21
申请号：US11348376
申请日：2006-02-07
CPC分类号： H04W52/245 , H04W16/14 , H04W48/18 , H04W52/246
摘要： A controller in a transceiver for radio communications in which the same frequency is shared between multiple communications systems is disclosed that includes: a cyclic autocorrelation value calculation part configured to calculate the cyclic autocorrelation value of a first one of the communications systems from a received signal; and a data transmission authorization part configured to determine whether to authorize data transmission in a second one of the communications systems based on the calculated cyclic autocorrelation value of the first one of the communications systems.
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公开(公告)号：US20060160551A1
公开(公告)日：2006-07-20
申请号：US11232018
申请日：2005-09-22
摘要： A frequency band allocation device is disclosed. The frequency band allocation device comprises an RF database (112) for storing frequency category information indicating a dedicated frequency band, a registered frequency band or unlicensed frequency band; a user information database (113) for storing user information; a frequency band selecting unit (1161, 1162) for selecting usable frequency bands based on the frequency category information and the user information; and a frequency band allocation unit (1163) for allocating a frequency band satisfying user required QoS out of the selected usable frequency bands.
摘要翻译： 公开了一种频带分配装置。 频带分配装置包括用于存储指示专用频带的频率类别信息，注册频带或非许可频带的RF数据库（112） 用于存储用户信息的用户信息数据库（113） 用于基于频率类别信息和用户信息来选择可用频带的频带选择单元（1161,1122）; 以及用于从所选择的可用频带中分配满足用户所需QoS的频带的频带分配单元（1163）。
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公开(公告)号：US06188697B1
公开(公告)日：2001-02-13
申请号：US08864783
申请日：1997-05-29
IPC分类号： H04L1256
CPC分类号： H04Q11/0478 , H04L2012/5607 , H04L2012/5649 , H04L2012/5651 , H04L2012/5672 , H04L2012/5681
摘要： An asynchronous transfer mode (“ATM”) cell transfer system in a wireless communication system provides quality classes that correspond to the amount of cell transfer delay allowed. Cells are classified according to a quality class and stored in buffers. The cells are read starting from the buffer for the quality class with the highest priority, and successively from buffers for quality classes of lower priority. Alternatively, if there is room in the output interval of cells of a higher priority quality class, cells of a lower quality class are inserted among these cells.
摘要翻译： 无线通信系统中的异步传输模式（“ATM”）小区传送系统提供与允许的小区传输延迟量对应的质量等级。 细胞根据质量等级分类并存储在缓冲液中。 从具有最高优先级的质量等级的缓冲器开始读取单元，并从缓冲器连续读取较低优先级的质量等级。 或者，如果在较高优先级质量等级的单元的输出间隔中存在空间，则在这些单元之间插入较低质量等级的单元。
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65.发明授权Digital transmission apparatus using differential coding and forward error correction 失效使用差分编码和前向纠错的数字传输装置
公开(公告)号：US5862175A
公开(公告)日：1999-01-19
申请号：US753726
申请日：1996-11-29
CPC分类号： H04L1/0047 , H04L1/0042 , H04L27/18 , H04L1/0058 , H04L1/0071
摘要： A digital transmission apparatus is provided, by which the amount of transmission delay and circuit miniaturization can be realized in the case of using an FEC method together with a differential coding method. In the digital transmission apparatus, a digital signal to be transmitted is serial-to-parallel-converted into parallel n-channel signals; each signal is FEC-encoded and encoded signals are then differentially encoded; and a carrier is modulated by the parallel n-channel differentially-encoded signals to be transmitted as a 2.sup.n multi-level modulated signal. The signal is detected at the receiving side and parallel n-channel demodulated and decoded signals are output; FEC decoding is performed; and the parallel n-channel digital signals after FEC decoding is parallel-to-serial-converted. When block coding is used as an FEC method, parallel n-channel digital signals to be transmitted are respectively processed by block-encoding of the same logic; the parallel n-channel signals after encoding are differentially encoded; and a carrier is modulated by the parallel n-channel differentially-encoded signals to be transmitted as a 2.sup.n multi-level modulated signal. At the receiving side, parallel n-channel signals after detection are stored; syndrome data for detecting an error bit position for each signal is calculated; and based on the syndrome data, time-series detection of each error bit position is performed so as to correct the errors included in the stored signals.
摘要翻译： 提供一种数字传输装置，通过该数字传输装置，在使用FEC方法和差分编码方法的情况下，可以实现传输延迟量和电路小型化。 在数字发送装置中，要发送的数字信号被串行 - 并行转换为并行的n信道信号; 每个信号被FEC编码，然后对编码的信号进行差分编码; 并且载波由并行的n信道差分编码信号调制以作为2n多级调制信号发送。 在接收端检测信号，并输出并行的n信道解调和解码信号; 执行FEC解码; 并且FEC解码之后的并行n信道数字信号被并行到串行转换。 当块编码被用作FEC方法时，要发送的并行n信道数字信号分别通过相同逻辑的块编码来处理; 编码后的并行n信道信号进行差分编码; 并且载波由并行的n信道差分编码信号调制以作为2n多级调制信号发送。 在接收侧，存储检测后的并行n信道信号; 计算用于检测每个信号的错误位位置的校正数据; 并且基于校正子数据，执行每个错误位位置的时间序列检测，以校正存储的信号中包括的错误。
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