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    • 6. 发明授权
    • Method and apparatus for estimating and reporting the quality of a wireless communication channel
    • 用于估计和报告无线通信信道质量的方法和装置
    • US07499406B2
    • 2009-03-03
    • US11732904
    • 2007-04-04
    • Philip J. PietraskiGregory S. SternbergRui YangBin Li
    • Philip J. PietraskiGregory S. SternbergRui YangBin Li
    • G06F11/00H04B3/46H04B17/00H04Q1/20
    • H04L1/0026H04L1/20H04L25/0202
    • A method and apparatus for estimating and reporting the quality of a wireless communication channel between a wireless transmit/receive unit (WTRU) and a Node-B. A modulated signal is received from the Node-B over the communication channel and a channel estimation is performed on the modulated signal to provide a channel estimate. In one embodiment, the modulated signal is demodulated based on the channel estimate to provide a demodulated signal and a signal-to-interference (SIR) estimate based on the demodulated signal is obtained. The quality of the communication channel is estimated based on at least the SIR estimate. In an alternate embodiment, a SIR estimate based on the channel estimate is obtained. The quality of the communication channel is estimated based on the SIR estimate and additional information including at least one of delay spread, transmit power and WTRU velocity information.
    • 一种用于估计和报告无线发射/接收单元(WTRU)和节点B之间的无线通信信道的质量的方法和装置。 通过通信信道从节点B接收调制信号,并对调制信号执行信道估计以提供信道估计。 在一个实施例中,基于信道估计来解调调制信号以提供解调信号,并且获得基于解调信号的信号干扰(SIR)估计。 至少基于SIR估计来估计通信信道的质量。 在替代实施例中,获得基于信道估计的SIR估计。 基于SIR估计和包括延迟扩展,发射功率和WTRU速度信息中的至少一个的附加信息来估计通信信道的质量。
    • 8. 发明申请
    • RECEIVER FOR ESTIMATING SIGNAL MAGNITUDE, NOISE POWER, AND SIGNAL-TO-NOISE RATIO OF RECEIVED SIGNALS
    • 用于估计信号噪声,噪声功率和接收信号的信噪比的接收机
    • US20080298508A1
    • 2008-12-04
    • US12166702
    • 2008-07-02
    • Bin LiGregory S. SternbergPhilip J. Pietraski
    • Bin LiGregory S. SternbergPhilip J. Pietraski
    • H03D1/24
    • H04L27/38H04L1/20
    • An improved receiver and method estimate one or more parameters, such as amplitude and signal-to-noise ratio, of a received signal, such as an M-QAM or q-ASK signal. The amplitude of an M-QAM signal is estimated based upon known or ascertainable phase information regarding a plurality of transmitted symbols. The amplitude of a q-ASK signal is estimated based upon known or ascertainable magnitude information regarding a plurality of transmitted symbols. In another embodiment, the amplitude of an M-QAM or q-ASK signal is estimated based on statistical knowledge of the amplitude of the transmitted symbols. Other embodiments estimate amplitude, noise power, and signal-to-noise ratio of a received signal utilizing second-order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process.
    • 改进的接收机和方法估计诸如M-QAM或q-ASK信号的接收信号的一个或多个参数,例如振幅和信噪比。 基于关于多个发送符号的已知或可确定的相位信息来估计M-QAM信号的幅度。 基于关于多个发送符号的已知或可确定的幅度信息来估计q-ASK信号的幅度。 在另一个实施例中,M-QAM或q-ASK信号的振幅基于所发送符号的幅度的统计知识来估计。 其他实施例使用接收样本的二阶和四阶矩,最大似然搜索处理或峰度估计过程来估计接收信号的幅度,噪声功率和信噪比。