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    • 1. 发明申请
    • 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
    • US20050094596A1
    • 2005-05-05
    • US10940079
    • 2004-09-14
    • Philip PietraskiGregory SternbergRui YangBin Li
    • Philip PietraskiGregory SternbergRui YangBin Li
    • H04L1/00H04L1/20H04L25/02H04L5/12
    • 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。
    • 4. 发明申请
    • Method for estimating signal magnitude, noise power, and signal-to-noise ratio of received signals
    • 用于估计接收信号的信号幅度,噪声功率和信噪比的方法
    • US20050053167A1
    • 2005-03-10
    • US10750203
    • 2003-12-31
    • Bin LiGregory SternbergPhilip Pietraski
    • Bin LiGregory SternbergPhilip Pietraski
    • H04L1/20H04L27/38H04L5/12
    • H04L27/38H04L1/20
    • An improved system and method for estimating 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, is set forth herein. A first embodiment of the invention estimates the amplitude of an M-QAM signal based upon known or ascertainable phase information regarding a plurality of transmitted symbols. A respective set of received symbols corresponding to the plurality of transmitted symbols is recovered. Each of the plurality of received symbols is multiplied by a complex unit vector with a phase that is opposite in sign to the complex transmitted data symbol to generate a set of products. The set of products is summed, and the real part of the sum of products is then determined. The absolute values of the known transmitted symbols are summed to generate a total magnitude value. The real part of the sum of products is divided by the sum of transmitted magnitude values to generate an estimate of the amplitude of the M-QAM signal. Other embodiments of the present invention utilize second-order and fourth-order moments of received samples, a maximum likelihood searching process, or a Kurtosis estimation process to estimate amplitude, noise power, and signal-to-noise ratio of a received signal.
    • 本文阐述了用于估计接收信号(诸如M-QAM或q-ASK信号)的一个或多个参数(诸如振幅和信噪比)的改进的系统和方法。 本发明的第一实施例基于关于多个发送符号的已知或可确定的相位信息估计M-QAM信号的幅度。 恢复对应于多个发送符号的相应的一组接收符号。 将多个接收到的符号中的每一个乘以具有与符号相反的相位的复数单位向量到复数发送的数据符号,以生成一组乘积。 产品组合相加,然后确定产品总额的实际部分。 已知发射符号的绝对值被相加以产生总幅值。 将产品总和的实部除以发送的幅度值的和以产生M-QAM信号的幅度的估计。 本发明的其它实施例利用接收样本的二阶和四阶矩,最大似然搜索处理或者一种用于估计接收信号的幅度,噪声功率和信噪比的一个峰值估计过程。
    • 10. 发明申请
    • Method and apparatus for generating a correction term
    • 用于产生校正项的方法和装置
    • US20070173201A1
    • 2007-07-26
    • US11716290
    • 2007-03-09
    • Philip PietraskiGregory SternbergRui Yang
    • Philip PietraskiGregory SternbergRui Yang
    • H04B17/00
    • H04L1/20H04B1/1027H04L1/0025H04L1/0026H04L1/0028H04L1/1607
    • A method and apparatus for generating a correction term is disclosed. A plurality of data packets are received from a transmitter. An acknowledgement (ACK) signal is generated for each data packet in which an error does not exist, and a negative-acknowledgement (NACK) signal is generated for each data packet in which an error exists. The generated signals are mapped into a binary signal. The binary signal is filtered to generate a filtered binary signal. A target packet error rate (PER) is generated. An error signal is generated by subtracting the target PER from the filtered binary signal. The error signal is processed to generate at least one correction term. The at least one correction term may be used to bias a signal-to-interference ratio (SIR) estimate of a communication channel established between the transmitter and a receiver based on the received data packets.
    • 公开了一种用于产生校正项的方法和装置。 从发射机接收多个数据分组。 对于其中不存在错误的每个数据分组生成确认(ACK)信号,并且对于存在错误的每个数据分组生成否定确认(NACK)信号。 所生成的信号被映射成二进制信号。 对二进制信号进行滤波以产生经滤波的二进制信号。 产生目标分组错误率(PER)。 通过从滤波的二进制信号中减去目标PER产生误差信号。 处理误差信号以产生至少一个校正项。 可以使用至少一个校正项来基于接收到的数据分组来偏置在发射机和接收机之间建立的通信信道的信号干扰比(SIR)估计。