公开(公告)号：US08605838B2

公开(公告)日：2013-12-10

申请号：US12883698

申请日：2010-09-16

申请人： Karl J. Molnar ,  George Jöngren

发明人： Karl J. Molnar ,  George Jöngren

IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： H04L25/0202 ,  H04J11/0023 ,  H04L1/20 ,  H04L25/0226 ,  H04L27/2601 ,  H04L27/2647 ,  H04W24/10

摘要： Interference is estimated in an Orthogonal Frequency Division Multiplexing system by receiving at a wireless receiver pilot symbols and data symbols transmitted in time and frequency via resource blocks, detecting a first one of the data symbols transmitted to the wireless receiver via a time-frequency resource element of a first one of the resource blocks and identifying a second one of the resource blocks adjacent the first resource block having related interference parameters. The interference is estimated based on the pilot symbols transmitted via the first resource block and the pilot symbols transmitted via the second resource block.

摘要翻译： 在正交频分复用系统中通过在无线接收机上接收经由资源块在时间和频率上发送的导频符号和数据符号来估计干扰，检测经由时间 - 频率资源元素发送到无线接收机的第一个数据符号 并且识别与具有相关干扰参数的第一资源块相邻的资源块中的第二个资源块。 基于经由第一资源块发送的导频符号和经由第二资源块发送的导频符号来估计干扰。

公开(公告)号：US07016436B1

公开(公告)日：2006-03-21

申请号：US09464830

申请日：1999-12-17

申请人： Karl J. Molnar

发明人： Karl J. Molnar

IPC分类号： H04B1/69 ,  H03D1/04

CPC分类号： H04B1/7105 ,  H04B1/7107

摘要： A signal is received in the presence of noise and interference by demodulating the signal when a relationship between the signal and the noise and the interference meets a criterion, and by jointly demodulating the signal when the relationship between the signal and the noise and the interference does not meet the criterion. Moreover, the signal may be demodulated if a relationship between the noise and the interference meets a second criterion and may be jointly demodulated if the relationship between the noise and the interference does not meet the second criterion. More specifically, demodulation may be performed when the signal-to-noise-and-interference ratio exceeds a first threshold and joint demodulation may be performed when the signal-to-noise-and-interference ratio is less than the first threshold. Moreover, the signal may be jointly demodulated if the interference-to-noise ratio exceeds a second threshold, and the signal may be demodulated if the interference-to-noise ratio is less than the second threshold. Thus, if the desired signal power is high relative to noise and interference, joint demodulation may be skipped and demodulation may be performed. Moreover, if the desired signal power is not large compared to interference-and-noise, joint demodulation may be used only when the interference power is high relative to the noise power. Finally, an interfering signal's synchronization word may be found in the received signal, and the power of the interfering signal relative to the noise power may be determined from the located interfering signal synchronization word, to thereby determine the interference-to-noise ratio. Moreover, the interfering signal's synchronization word that is detected can provide improved estimation of the interfering signal's channel estimate, which can be estimated in terms of the interfering signal's medium response compared to the composite channel response.

公开(公告)号：US06768913B1

公开(公告)日：2004-07-27

申请号：US09583535

申请日：2000-06-01

申请人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

发明人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

IPC分类号： H04B138

CPC分类号： H04W16/28 ,  H04B7/18532

摘要： A radio communication system includes a base station having a directional antenna for generating a plurality of beams. A first set of the beams is used to receive signals which are decoded at the base station. A second set of the beams is used for interrogating a cell to identify beams which should be added to the first set of beams (for example, in response to mobile terminals entering the cell). In one embodiment, the second set of beams comprises a plurality of searcher beams produced by a fixed-beam phased array antenna. In a second embodiment, the second set of beams comprises a single searcher beam which is scanned through the cell by an adaptive phased array antenna. The radio communication system can be used to communicate with indoor mobile terminals through a plurality of radio heads, and also can be used to communicate with orbiting satellites.

公开(公告)号：US06694154B1

公开(公告)日：2004-02-17

申请号：US08971341

申请日：1997-11-17

申请人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

发明人： Karl J. Molnar ,  Gregory E. Bottomley ,  Sandeep Chennakeshu

IPC分类号： H04B138

CPC分类号： H04W16/28 ,  H04B7/18532

摘要： A radio communication system includes a base station having a directional antenna for generating a plurality of beams. A first set of the beams is used to receive signals which are decoded at the base station. A second set of the beams is used for interrogating a cell to identify beams which should be added to the first set of beams (for example, in response to mobile terminals entering the cell). In one embodiment, the second set of beams comprises a plurality of searcher beams produced by a fixed-beam phased array antenna. In a second embodiment, the second set of beams comprises a single searcher beam which is scanned through the cell by an adaptive phased array antenna. The radio communication system can be used to communicate with indoor mobile terminals through a plurality of radio heads, and also can be used to communicate with orbiting satellites.

摘要翻译： 无线电通信系统包括具有用于产生多个波束的定向天线的基站。 第一组光束用于接收在基站处解码的信号。 第二组波束用于询问小区以识别应该被添加到第一组波束（例如，响应于进入小区的移动终端）的波束。 在一个实施例中，第二组波束包括由固定波束相控阵天线产生的多个搜索器波束。 在第二实施例中，第二组波束包括通过自适应相控阵列天线扫描小区的单个搜索器波束。 无线电通信系统可以用于通过多个无线电头与室内移动终端通信，并且还可以用于与轨道卫星通信。

公开(公告)号：US06421543B1

公开(公告)日：2002-07-16

申请号：US08592925

申请日：1996-01-29

申请人： Karl J. Molnar

发明人： Karl J. Molnar

IPC分类号： H04B138

CPC分类号： H04B7/082 ,  H04B7/10

摘要： A cellular radiotelephone base station communicates with cellular radiotelephones by receiving cellular radiotelephone communications energy from cellular radiotelephones on an antenna array, processing the received communications energy to produce at least three processed radiotelephone communications signals representing communications energy received from a coverage sector, and selecting at least two of the processed signals for decoding in a conventional decoder. Preferably, the selected signals are the processed signals having the highest power or signal quality. Diversity gain is achieved by processing the received communications energy to produce at least two processed first polarization signals representing received communications energy having a first polarization and at least two processed second polarization signals representing received communications energy having a second polarization, and selecting at least one of the processed first polarization signals and at least one of the second polarization processed signals for decoding. Preferably the selected processed first polarization and second polarization signals are the signals from each polarization having the highest power or signal quality.

摘要翻译： 蜂窝无线电话机基站通过从天线阵列上的蜂窝无线电话机接收蜂窝无线电话通信能量来与蜂窝无线电话机进行通信，处理所接收的通信能量以产生表示从覆盖区域接收的通信能量的至少三个处理的无线电话通信信号，并且至少选择 两个经处理的信号用于在常规解码器中进行解码。 优选地，所选择的信号是具有最高功率或信号质量的处理信号。 通过处理所接收的通信能量以产生表示具有第一极化的接收通信能量的至少两个处理的第一极化信号和表示具有第二极化的接收通信能量的至少两个经处理的第二极化信号来实现分集增益，并且选择以下各项中的至少一个： 处理的第一偏振信号和用于解码的第二偏振处理信号中的至少一个。 优选地，所选择的处理的第一偏振和第二偏振信号是具有最高功率或信号质量的来自每个极化的信号。