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公开(公告)号：US08363697B2
公开(公告)日：2013-01-29
申请号：US11041136
申请日：2005-01-20
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
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公开(公告)号：US20110134967A1
公开(公告)日：2011-06-09
申请号：US12985333
申请日：2011-01-05
IPC分类号： H04B1/707
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
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公开(公告)号：US08737538B2
公开(公告)日：2014-05-27
申请号：US12985328
申请日：2011-01-05
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
摘要翻译： 同步广播使用来自多个发射机的相同波形发送相同的广播内容。 发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现广播伪随机噪声（PN）码，供多个发射机使用。 然后使用均衡器来估计同步的广播传输。
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公开(公告)号：US20110134824A1
公开(公告)日：2011-06-09
申请号：US12985331
申请日：2011-01-05
IPC分类号： H04W4/06
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
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公开(公告)号：US08619835B2
公开(公告)日：2013-12-31
申请号：US12985331
申请日：2011-01-05
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
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公开(公告)号：US08582621B2
公开(公告)日：2013-11-12
申请号：US12985333
申请日：2011-01-05
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
摘要翻译： 同步广播使用来自多个发射机的相同波形发送相同的广播内容。 发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现广播伪随机噪声（PN）码，供多个发射机使用。 然后使用均衡器来估计同步的广播传输。
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公开(公告)号：US20110134823A1
公开(公告)日：2011-06-09
申请号：US12985328
申请日：2011-01-05
IPC分类号： H04W4/06
CPC分类号： H04L5/026 , H04L27/2607
摘要： Synchronized broadcast transmits a same broadcast content using a same waveform from multiple transmitters. Transmitters each apply a same spreading code for broadcast transmissions. In a spread-spectrum communication system having a time division multiplexed forward link, a synchronized broadcast transmission is inserted into a broadcast slot. One embodiment employs an Orthogonal Frequency Divisional Multiplex (OFDM) waveform for the synchronized broadcast. An OFDM receiver is then used to process the received synchronized broadcast transmission. An alternate embodiment implements a broadcast Pseudo-random Noise (PN) code for use by multiple transmitters. An equalizer is then employed to estimate the synchronized broadcast transmission.
摘要翻译： 同步广播使用来自多个发射机的相同波形发送相同的广播内容。 发射机各自对广播传输应用相同的扩展码。 在具有时分多路复用前向链路的扩频通信系统中，将同步的广播传输插入广播时隙。 一个实施例采用用于同步广播的正交频分复用（OFDM）波形。 然后使用OFDM接收机来处理所接收的同步广播传输。 替代实施例实现广播伪随机噪声（PN）码，供多个发射机使用。 然后使用均衡器来估计同步的广播传输。
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8.发明授权Noise variance estimation in wireless communications for diversity combining and log likelihood scaling 有权用于分集组合和对数似然度比例的无线通信中的噪声方差估计公开(公告)号：US08126072B2
公开(公告)日：2012-02-28
申请号：US12491056
申请日：2009-06-24
申请人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
发明人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
IPC分类号： H04L27/28
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： The present patent application comprises a method and means for demodulating symbols, comprising converting an OFDM symbol from a time domain to a frequency domain, selecting pilot tones, making a soft decision based on received data, and estimating a channel frequency response. In another example, the method and means further comprises selecting guard tones. In another example, the method and means further comprises generating channel estimates for in-band and band-edge pilot tones.
摘要翻译： 本专利申请包括用于解调符号的方法和装置，包括将OFDM符号从时域转换到频域，选择导频音，基于接收到的数据进行软判决，以及估计信道频率响应。 在另一示例中，该方法和装置还包括选择保护音。 在另一示例中，该方法和装置还包括生成带内和带边导频音调的信道估计。
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9.发明授权公开(公告)号：US07564775B2
公开(公告)日：2009-07-21
申请号：US11119240
申请日：2005-04-29
IPC分类号： H04J11/00
CPC分类号： H04L27/2662 , H04L1/20 , H04L5/0048 , H04L27/2695 , H04L2001/0093
摘要： A spread-spectrum communication system provides an effective signal-to-noise ratio (SNR) of received orthogonal frequency division multiplex (OFDM) slots in the presence of timing errors. Effective SNR can serve as a diagnostic tool for determining whether there was a timing error when a measured packet error rate (PER) remains high, and a predicted PER from the effective SNR remains low. A loop can use the effective SNR to control a time reference used by an OFDM decoder.
摘要翻译： 在存在定时误差的情况下，扩频通信系统提供接收到的正交频分复用（OFDM）时隙的有效信噪比（SNR）。 当测量的分组错误率（PER）保持为高时，有效SNR可以用作确定是否存在定时误差的诊断工具，并且来自有效SNR的预测的PER保持为低。 循环可以使用有效SNR来控制OFDM解码器使用的时间参考。
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10.发明授权Noise variance estimation in wireless communications for diversity combining and log-likelihood scaling 失效无线通信中的噪声方差估计用于分集组合和对数似然度比例公开(公告)号：US07672383B2
公开(公告)日：2010-03-02
申请号：US11047347
申请日：2005-01-28
申请人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
发明人： June Namgoong , Hao Xu , Peter J. Black , Srikant Jayaraman
IPC分类号： H04L27/28
CPC分类号： H04L1/20 , H04B1/1027 , H04L27/2647
摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.
摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。
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