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1. 发明授权

US07821915B2 Channel tracking in an OFDM wireless receiver 有权
标题翻译： OFDM无线接收机中的信道跟踪
公开(公告)号：US07821915B2
公开(公告)日：2010-10-26
申请号：US12130368
申请日：2008-05-30
申请人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
发明人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
IPC分类号： H04J11/00
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to track the channel response for subcarriers in an OFDM receiver for a packet of information that includes a known transmitted part. The receiver has a signal-to-tone transformer to determine subcarriers corresponding to a received packet. The method stores a function of an initial estimate of the channel response for a subcarrier, and accepts a pre-decision constellation point value that is a post channel correction using a first estimate of the channel response. The method includes: makes a decision using the pre-decision constellation point value, re-modulates the decision to form a post-decision constellation point value, and forms a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values. This complex valued product forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译：一种用于跟踪OFDM接收机中用于包括已知传输部分的信息分组的子载波的信道响应的装置和方法。接收机具有信号到音调的变压器来确定与接收的分组相对应的子载波。该方法存储子载波的信道响应的初始估计的函数，并且接收使用信道响应的第一估计的作为后信道校正的预决策星座点值。该方法包括：使用预决策星座点值进行判定，重新调制决策以形成后决策星座点值，并形成子载波和复合体的第一估计函数的复值乘积估价和决策后价值的比值。该复值产品形成用于更新存储数量的当前通道估计值的度量。

2. 发明授权

US07397758B1 Channel tracking in a OFDM wireless receiver 有权
标题翻译： OFDM无线接收机中的信道跟踪
公开(公告)号：US07397758B1
公开(公告)日：2008-07-08
申请号：US10807547
申请日：2004-03-22
申请人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
发明人： Brian Hart , David J. Pignatelli , Eldad Perahia , Paul C. P. Dankoski
IPC分类号： H04J11/00 , H04J1/00
CPC分类号： H04L25/0228 , H04L27/2647
摘要： An apparatus and a method to estimate the channel response for a set of subcarriers in an OFDM receiver. The receiver receives a packet of information that includes a known transmitted part having known subcarrier values, and includes a signal-to-tone transformer to determine the subcarriers of a signal corresponding to a received packet. For each subcarrier, the method stores a function of an initial estimate of the channel response for the subcarrier, and accepts a post-channel correction pre-decision constellation point value for the subcarrier. The method further includes making a decision using the pre-decision constellation point value, re-modulating the decision to form a post-decision constellation point value, and forming a complex valued product of the function of the first estimate for the subcarrier and the complex-valued ratio of the pre-decision and post-decision values to forms a measure of the current channel estimate to use for updating the stored quantity.
摘要翻译：一种用于估计OFDM接收机中的一组子载波的信道响应的装置和方法。接收机接收包括具有已知子载波值的已知发射部分的信息分组，并且包括信号到音调变换器以确定与接收到的分组相对应的信号的子载波。对于每个子载波，该方法存储子载波的信道响应的初始估计的函数，并且接收用于子载波的信道后校正预决定星座点值。该方法还包括使用预决定星座点值进行判定，重新调制决定以形成后决定星座点值，以及形成子载波和复合物的第一估计的函数的复值乘积预判定值和后决定值的估值比率，以形成用于更新存储数量的当前信道估计值的度量。

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