会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明申请
    • UNIFIED PULSE SHAPING FOR MULTI-CARRIER AND SINGLE-CARRIER WAVEFORMS
    • 用于多载波和单载波波形的统一脉冲形状
    • WO2006023705A1
    • 2006-03-02
    • PCT/US2005/029506
    • 2005-08-19
    • QUALCOMM INCORPORATEDGORE, Dhananjay AshokAGRAWAL, AvneeshKHANDEKAR, Aamod
    • GORE, Dhananjay AshokAGRAWAL, AvneeshKHANDEKAR, Aamod
    • H04L27/26
    • H04L5/0048H04L5/0007H04L5/0044H04L25/03834H04L27/0008H04L27/2607H04L27/2626H04L27/2647
    • To transmit a multi-carrier signal, a transmitter provides zero symbols for guard subbands, performs OFDM modulation, and filters the resultant time-domain samples with a pulse shaping filter. To transmit a single-carrier signal, the transmitter partitions the single-carrier signal into segments. Each segment contains up to K samples and is padded, if needed, to the length of an OFDM symbol. Each padded segment is transformed from the time domain to the frequency domain to generate a corresponding frequency-domain segment with K symbols. For each frequency-domain segment, the symbols corresponding to the guard subbands are set to zero. Each frequency-domain segment is then transformed from the frequency domain to the time domain to generate a corresponding time-domain segment. A cyclic prefix may or may not be appended to each time-domain segment. Each time-domain segment is filtered with the same pulse shaping filter to generate an output waveform for the single-carrier signal.
    • 为了发送多载波信号,发射机为保护子带提供零符号,执行OFDM调制,并用脉冲整形滤波器对合成的时域采样进行滤波。 为了发送单载波信号,发射机将单载波信号分割成段。 每个段包含多达K个样本,并且如果需要,则填充到OFDM符号的长度。 每个填充段从时域变换到频域,以产生具有K个符号的对应的频域段。 对于每个频域段,对应于保护子带的符号被设置为零。 然后将每个频域段从频域变换到时域以产生对应的时域段。 循环前缀可以附加到每个时域段,也可以不附加到每个时域段。 每个时域分段用相同的脉冲整形滤波器滤波,以产生单载波信号的输出波形。
    • 2. 发明申请
    • INCREMENTAL PILOT INSERTION FOR CHANNEL AND INTERFERENCE ESTIMATION
    • 用于通道和干扰估计的增量试点插入
    • WO2006020021A1
    • 2006-02-23
    • PCT/US2005/025157
    • 2005-07-15
    • QUALCOMM INCORPORATEDGORE, Dhananjay, AshokAGRAWAL, AvneeshKHANDEKAR, Aamod
    • GORE, Dhananjay, AshokAGRAWAL, AvneeshKHANDEKAR, Aamod
    • H04L27/26
    • H04L25/0226H04L5/0007H04L5/005H04L5/0051H04L5/006
    • Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use a common pilot channel configuration to aid channel estimation in one or more receivers in communication with the system. A receiver in communication with the system may be unable to demodulate received data due to an inaccurate channel estimate. The receiver can communicate to a transmitter in the system a request for additional channel estimation resources. The wireless communication system can provide additional channel estimation resources by inserting dedicated pilot channels into one or more of the frequencies allocated to symbols for the receiver. If the receiver is still unable to demodulate received data, the wireless communication system can incrementally insert additional pilot channels in the symbol associated with the receiver.
    • 公开了动态资源分配系统,装置和方法,用于选择性地提高接收机在正交频分多址(OFDMA)系统中确定信道估计的能力。 无线通信系统可以使用公共导频信道配置来辅助与系统通信的一个或多个接收机中的信道估计。 与系统通信的接收机可能由于不准确的信道估计而无法解调所接收的数据。 接收机可以向系统中的发射机通信另外的信道估计资源的请求。 无线通信系统可以通过将专用导频信道插入分配给接收机的符号的一个或多个频率来提供额外的信道估计资源。 如果接收机仍然不能解调所接收的数据,则无线通信系统可以递增地在与接收机相关联的符号中插入附加的导频信道。