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公开(公告)号：US08401128B2
公开(公告)日：2013-03-19
申请号：US10830387
申请日：2004-04-22
申请人： Bengt Lindoff , Bo Bernhardsson
发明人： Bengt Lindoff , Bo Bernhardsson
CPC分类号： H04L27/3809 , H04L27/00
摘要： A method and system are described for processing a received signal at a receiver in a communication system. The receiver includes a digital filter and automatic gain control means. Information indicating the frequency band of operation and the type of service of the received signal is received at the receiver from the communication system. The gain and filtering parameters of the receiver are set according to the received information. The received signal is processed at the receiver using the gain and filtering parameters. Optionally, a determination of whether the received signal contains adjacent channel interference above a predetermined allowable threshold may also be made and the determination may then be used in setting the gain and filtering parameters.
摘要翻译： 描述了用于在通信系统中的接收机处理接收信号的方法和系统。 接收机包括数字滤波器和自动增益控制装置。 在通信系统的接收机处接收表示接收信号的工作频带和接收信号的种类的信息。 根据接收到的信息设置接收机的增益和滤波参数。 使用增益和滤波参数在接收机处理接收到的信号。 可选地，还可以做出接收信号是否包含高于预定允许阈值的相邻信道干扰的确定，然后可以将该确定用于设置增益和滤波参数。
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公开(公告)号：US20110019749A1
公开(公告)日：2011-01-27
申请号：US12746604
申请日：2008-12-08
申请人： Leif Wilhelmsson , Bo Bernhardsson , Lars Björkman
发明人： Leif Wilhelmsson , Bo Bernhardsson , Lars Björkman
IPC分类号： H04L27/00
CPC分类号： H04L25/022 , H04L5/0048 , H04L25/0232 , H04L27/2647 , H04L27/2662
摘要： Methods for calculating a delay spread estimate in an OFDM-receiver are described, along with computer program products and electronic apparatuses for performing the methods. The methods comprise determining a position of an FFT-window in relation to one or more OFDM-symbols of a received OFDM-signal and using the determined position to obtain a first OFDM-symbol from the received OFDM-signal. An FFT is applied to the first OFDM-symbol to produce an FFT-output signal. A frequency dependent phase rotation component of the FFT-output signal is determined and removed from the FFT-output signal. A number of zero-crossings of at least one of a real component and an imaginary component of a transfer function of a channel, over which the received OFDM-signal has been transmitted, derived from the FFT-output signal where the frequency dependent phase rotation component has been removed is determined, and a delay spread estimate is calculated based on the determined number of zero-crossings.
摘要翻译： 与用于执行方法的计算机程序产品和电子设备一起描述了用于计算OFDM接收机中的延迟扩展估计的方法。 所述方法包括相对于所接收的OFDM信号的一个或多个OFDM符号确定FFT窗口的位置，并使用确定的位置从接收的OFDM信号中获得第一OFDM符号。 对第一OFDM符号应用FFT以产生FFT输出信号。 FFT输出信号的频率相关相位旋转分量被确定并从FFT输出信号中去除。 频率依赖相位旋转的FFT输出信号导出传输函数的传输函数的实数分量和虚分量中的至少一个的多个零交叉 已经去除了分量，并且基于确定的过零点数来计算延迟扩展估计。
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公开(公告)号：US20100311346A1
公开(公告)日：2010-12-09
申请号：US12682857
申请日：2008-08-27
申请人： Bengt Lindoff , Bo Bernhardsson , Johan Nilsson
发明人： Bengt Lindoff , Bo Bernhardsson , Johan Nilsson
IPC分类号： H04B17/00
CPC分类号： H04B1/1081 , H04J11/0073 , H04L25/0224 , H04L25/06 , H04L27/2655 , H04L27/2656
摘要： Methods and devices for detecting a symbol in a radio channel and for cell identification are disclosed. A signal is received from the radio channel and the signal is filtered by a filter being responsive to the symbol thereby establishing a first signal. A second signal dependent on the noise floor of the received signal is established—whereby a time interval expected to include multi-path components being excluded or suppressed. A third signal being the ratio between the first signal and the noise floor is established, and the presence of the symbol is detected by detecting a peak in the third signal.
摘要翻译： 公开了用于检测无线电信道中的符号和用于小区识别的方法和装置。 从无线电信道接收信号，并且信号被响应于符号的滤波器滤波，从而建立第一信号。 建立取决于接收信号的本底噪声的第二信号，由此排除或抑制预期包括多路径分量的时间间隔。 确定第一信号和噪声本底之间的比值的第三信号，并且通过检测第三信号中的峰值来检测符号的存在。
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公开(公告)号：US20100272219A1
公开(公告)日：2010-10-28
申请号：US12809710
申请日：2008-12-15
IPC分类号： H04L27/08
CPC分类号： H04L27/2647 , H03G3/3052 , H03G3/3078
摘要： A method and apparatus for adjusting the gain of an amplifier (202) in a communication receiver comprising: estimating the power of a time domain signal (307); estimating the power distribution on one or more sub-carriers of a frequency domain signal (309) transformed from the time domain signal; and generating a gain control signal for the amplifier based on the estimated power of the time domain signal and the power distribution on sub-carriers of the frequency domain signal (311).
摘要翻译： 一种用于调整通信接收机中的放大器（202）的增益的方法和装置，包括：估计时域信号的功率（307）; 估计从时域信号变换的频域信号（309）的一个或多个子载波上的功率分布; 以及基于所述时域信号的估计功率和所述频域信号（311）的子载波上的功率分配来生成用于所述放大器的增益控制信号。
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公开(公告)号：US07680218B2
公开(公告)日：2010-03-16
申请号：US11438874
申请日：2006-05-23
CPC分类号： H04L25/023 , H04L25/0204 , H04L25/022 , H04L27/2608 , H04L27/2647
摘要： A method and apparatus for predicting channel estimates for non-received signal frequencies provides knowledge of propagation channel characteristics for non-received frequencies. One embodiment predicts uplink (or downlink) channel estimates based on measured downlink (or uplink) channel estimates, which is advantageous in systems having different uplink and downlink frequencies. Another embodiment predicts channel responses for non-received OFDM sub carrier frequencies based on measuring channel responses for received OFDM sub carrier frequencies. Such processing may comprise, for example, measuring channel responses for received OFDM pilot sub carriers, predicting channel responses at frequency intervals corresponding to pilot sub carrier spacing, and interpolating between those values to predict channel responses at data sub carrier frequencies.
摘要翻译： 用于预测未接收信号频率的信道估计的方法和装置提供了对于未接收频率的传播信道特性的知识。 一个实施例基于测量的下行链路（或上行链路）信道估计来预测上行链路（或下行链路）信道估计，这在具有不同的上行链路和下行链路频率的系统中是有利的。 另一个实施例基于对接收的OFDM子载波频率的测量信道响应来预测未接收的OFDM子载波频率的信道响应。 这样的处理可以包括例如测量接收的OFDM导频子载波的信道响应，以对应于导频子载波间隔的频率间隔预测信道响应，以及在这些值之间内插以预测数据子载波频率处的信道响应。
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16.发明授权公开(公告)号：US07583760B2
公开(公告)日：2009-09-01
申请号：US10535479
申请日：2003-10-09
申请人： Bo Bernhardsson , Bengt Lindoff , Peter Malm
发明人： Bo Bernhardsson , Bengt Lindoff , Peter Malm
CPC分类号： H04L1/0045 , H04L1/18 , H04L25/067 , H04L27/38
摘要： Method of, and arrangement and device for, decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme including amplitude information; generating a likelihood value for a received communications signal, decoding the communications signal based on at least the generated likelihood value, providing a reliability indication of the amplitude information conveyed by the received communications signal wherein the step of generating the likelihood value further comprises generating the likelihood value on the basis of the provided reliability indication of the amplitude information.
摘要翻译： 根据包括幅度信息的调制方式对通信信号进行调制的数字通信系统中对通信信号进行解码的方法和装置和装置; 生成接收到的通信信号的似然值，至少基于所生成的似然值对通信信号进行解码，提供由接收的通信信号传送的幅度信息的可靠性指示，其中生成似然值的步骤进一步包括产生似然值 基于所提供的幅度信息的可靠性指示值。
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17.发明申请公开(公告)号：US20080212654A1
公开(公告)日：2008-09-04
申请号：US11908935
申请日：2006-03-07
申请人： Johan Nilsson , Bo Bernhardsson , Bengt Lindoff
发明人： Johan Nilsson , Bo Bernhardsson , Bengt Lindoff
IPC分类号： H04B1/707
CPC分类号： H04J13/0048 , H04B1/7075 , H04B1/7077 , H04B2201/70701 , H04J13/18
摘要： Disclosed is a method of generating a detection signal for detecting energy in a spread-spectrum signal, comprising: de-spreading the spread-spectrum signal by applying a predetermined spreading code to obtain a sequence of de-spread signal symbols (202A-202D); accumulating a number of said signal symbols to obtain a single detection signal. The accumulation includes: obtaining a first and a second subset of said de-spread signal symbols, wherein the symbols of the first subset have values that are known to the receiver or at least known to be the same for all symbols of the first subset, and wherein the symbols of the second subset have unknown values; coherently accumulating the symbols of the first subset to obtain a first partial detection signal (203A, 203B, 203C); non-coherently accumulating the symbols of the second subset to obtain a second partial detection signal (204A, 204B, 204C); and combining the first and second partial detection signals to obtain the single detection signal (208).
摘要翻译： 公开了一种生成用于检测扩频信号中的能量的检测信号的方法，包括：通过施加预定的扩展码对扩展频谱信号进行解扩，以获得解扩信号符号序列（202A-202 D）; 累积多个所述信号符号以获得单个检测信号。 积累包括：获得所述去扩展信号符号的第一和第二子集，其中第一子集的符号具有接收器已知的或至少已知对于第一子集的所有符号是相同的值， 并且其中所述第二子集的符号具有未知值; 相干地累积第一子集的符号以获得第一部分检测信号（203A，203B，203C）; 非相干地累积第二子集的符号以获得第二部分检测信号（204A，204B，204C）; 以及组合所述第一和第二部分检测信号以获得所述单个检测信号（208）。
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公开(公告)号：US20070092012A1
公开(公告)日：2007-04-26
申请号：US11438874
申请日：2006-05-23
CPC分类号： H04L25/023 , H04L25/0204 , H04L25/022 , H04L27/2608 , H04L27/2647
摘要： A method and apparatus for predicting channel estimates for non-received signal frequencies provides knowledge of propagation channel characteristics for non-received frequencies. One embodiment predicts uplink (or downlink) channel estimates based on measured downlink (or uplink) channel estimates, which is advantageous in systems having different uplink and downlink frequencies. Another embodiment predicts channel responses for non-received OFDM sub carrier frequencies based on measuring channel responses for received OFDM sub carrier frequencies. Such processing may comprise, for example, measuring channel responses for received OFDM pilot sub carriers, predicting channel responses at frequency intervals corresponding to pilot sub carrier spacing, and interpolating between those values to predict channel responses at data sub carrier frequencies.
摘要翻译： 用于预测未接收信号频率的信道估计的方法和装置提供了对于未接收频率的传播信道特性的知识。 一个实施例基于测量的下行链路（或上行链路）信道估计来预测上行链路（或下行链路）信道估计，这在具有不同的上行链路和下行链路频率的系统中是有利的。 另一个实施例基于对接收的OFDM子载波频率的测量信道响应来预测未接收的OFDM子载波频率的信道响应。 这样的处理可以包括例如测量接收的OFDM导频子载波的信道响应，以对应于导频子载波间隔的频率间隔预测信道响应，以及在这些值之间内插以预测数据子载波频率处的信道响应。
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19.发明授权Methods, receivers, and computer program products for determining transmission power control commands using biased interpretation 有权方法，接收器和计算机程序产品，用于使用偏倚的解释来确定传输功率控制命令公开(公告)号：US07184791B2
公开(公告)日：2007-02-27
申请号：US10445759
申请日：2003-05-27
申请人： Johan Nilsson , Elias Jonsson , Bo Bernhardsson , Bengt Lindoff
发明人： Johan Nilsson , Elias Jonsson , Bo Bernhardsson , Bengt Lindoff
摘要： Methods, receivers, and computer program products for defining asymmetric decision regions of a symbol space to interpret transmitted power control commands are disclosed. A method of determining transmitted power control commands at a receiver can include defining a first decision region of a symbol space associated with a first power control command at the receiver and a second decision region of the symbol space associated with a second power control command at the receiver where the first and second regions are asymmetric with one another. Methods of determining a transmitted power control command during soft handover mode in a wideband code division multiple access communications system are also discussed wherein a first determination of a combined power control command received from a plurality of transmitters can be combined with a second determination of the combined power control command received from the plurality of transmitters to provide a combined power control command. Related circuits are disclosed as well.
摘要翻译： 公开了用于定义符号空间的不对称决定区域以解释发射功率控制命令的方法，接收机和计算机程序产品。 在接收机处确定发射功率控制命令的方法可以包括定义与接收机处的第一功率控制命令相关联的符号空间的第一判定区域和与第二功率控制命令相关联的符号空间的第二判定区域 接收器，其中第一和第二区域彼此不对称。 还讨论了在宽带码分多址通信系统中在软切换模式期间确定发射功率控制命令的方法，其中从多个发射机接收的组合功率控制命令的第一确定可以与组合的第二确定相结合 功率控制命令从多个发射机接收以提供组合的功率控制命令。 也公开了相关电路。
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20.发明申请公开(公告)号：US20060126761A1
公开(公告)日：2006-06-15
申请号：US10535479
申请日：2003-10-09
申请人： Bo Bernhardsson , Bengt Lindoff , Peter Malm
发明人： Bo Bernhardsson , Bengt Lindoff , Peter Malm
IPC分类号： H04L27/06
CPC分类号： H04L1/0045 , H04L1/18 , H04L25/067 , H04L27/38
摘要： A method of decoding a communications signal in a digital communications system, where the communications signal is modulated according to a modulation scheme, such as 16-QAM, including amplitude information. The method comprises the steps of generating (406) a likelihood value for a received communications signal; decoding (408) the communications signal based on at least the generated likelihood value. The method further comprises providing (302) a reliability indication of the amplitude information conveyed by the received communications signal; and generating the likelihood value on the basis of the provided reliability indication of the amplitude information.
摘要翻译： 一种在数字通信系统中对通信信号进行解码的方法，其中通信信号根据包括幅度信息的诸如16-QAM的调制方案进行调制。 该方法包括以下步骤：产生（406）接收到的通信信号的似然值; 至少基于所生成的似然值对通信信号进行解码（408）。 该方法还包括提供（302）由所接收的通信信号传送的幅度信息的可靠性指示; 以及基于所提供的幅度信息的可靠性指示来生成似然值。
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