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1. 发明授权

US5193102A Method and apparatus for improving detection of data bits in a slow frequency hopping communication system 失效
标题翻译：用于改善慢跳频通信系统中的数据比特检测的方法和装置
公开(公告)号：US5193102A
公开(公告)日：1993-03-09
申请号：US794104
申请日：1991-11-18
申请人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
发明人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
IPC分类号： H03M13/25 , H03M13/39 , H04B1/713 , H04B7/08
CPC分类号： H04B1/715 , H03M13/25 , H03M13/39 , H04B7/08 , H04B2001/7152 , H04B7/0802
摘要： A method and apparatus is provided for improving detection of data bits in data samples (120) of a hop of a slow frequency hopping spread spectrum signal (112). In the detecting process, the carrier to interference (C/l) power ratio of the hop is estimated (124) by using the data samples (120) of the hop. Subsequently, a data bit (130) is detected by using the estimated C/l power ratio (126). The detection process (128) may include utilizing maximum likelihood decoding techniques to derive a data bit (130) from decision metrics and the estimated C/l power ratio (126). The decision metrics correspond to a measurement of the distance of data samples (120) from constellation points within a constellation space representing data samples (120) previously used to generate decision metrics. The detection process (128) also may include utilizing the estimated C/l power ratio (126) in combining data samples (120) of the hop as received from two or more diversity receiver branches.
摘要翻译：提供一种方法和装置，用于改进对慢跳频扩频信号（112）的跳的数据采样（120）中的数据位的检测。在检测过程中，通过使用跳的数据采样（120）来估计跳跃的载波干扰（C / 1）功率比（124）。随后，通过使用估计的C / l功率比（126）来检测数据位（130）。检测过程（128）可以包括利用最大似然解码技术从决策度量和估计的C / l功率比导出数据比特（130）（126）。所述决策度量对应于来自表示先前用于生成决策度量的数据样本（120）的星座空间内的数据采样（120）与星座点的距离的测量。检测处理（128）还可以包括在组合从两个或更多个分集接收器分支接收的跳数的数据样本（120）时利用估计的C / l功率比（126）。

2. 发明授权

US5428818A Method and apparatus for reducing interference in a radio communication link of a cellular communication system 失效
标题翻译：用于减少蜂窝通信系统的无线电通信链路中的干扰的方法和装置
公开(公告)号：US5428818A
公开(公告)日：1995-06-27
申请号：US182526
申请日：1994-01-18
申请人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
发明人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
IPC分类号： H04B20060101 , H04B7/00 , H04B10/00 , H04L25/49 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/06 , H04W36/20 , H04W36/30 , H04W84/04 , H04Q7/36
CPC分类号： H04W36/20 , H04W36/06 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/30 , H04W84/042
摘要： A method and apparatus is provided for reducing interference in a radio communication link from a central site (230) to a mobile unit (228) in a cellular communication system. The central site (230) includes a first (202) and a second (216) antenna which serve the geographic region (214) in which the mobile unit (228) is located. The radio communication link may be provided by communicating a signal in a first radio communication channel between the first central site antenna (202) and the mobile unit (228). Similarly, the radio communication link may be provided by communicating a signal in a second radio communication channel between the second central site antenna (216) and the mobile unit (228). A measure of interference in the first radio communication channel providing the radio communication link is determined. The radio communication link is switched, in response to the measure of interference being above a predetermined threshold, from the first to the second radio communication channel.
摘要翻译：提供了一种用于减少在蜂窝通信系统中从中心站点（230）到移动单元（228）的无线电通信链路中的干扰的方法和装置。中心站点（230）包括用于移动单元（228）所在的地理区域（214）的第一（202）和第二（216）天线。可以通过在第一中心站点天线（202）和移动单元（228）之间的第一无线电通信信道中传送信号来提供无线电通信链路。类似地，可以通过在第二中心站点天线（216）和移动单元（228）之间的第二无线电通信信道中传送信号来提供无线电通信链路。确定提供无线电通信链路的第一无线电通信信道中的干扰的度量。响应于干扰的测量高于预定阈值，无线电通信链路从第一无线电通信信道切换到第二无线电通信信道。

3. 发明授权

US5619493A Spread-spectrum, frequency-hopping radio telephone system with voice activation 失效
标题翻译：扩频，跳频无线电话系统具有语音激活功能
公开(公告)号：US5619493A
公开(公告)日：1997-04-08
申请号：US606587
申请日：1996-02-26
申请人： Mordechai Ritz , Noam Livneh , Giora Silbershatz
发明人： Mordechai Ritz , Noam Livneh , Giora Silbershatz
IPC分类号： H04B1/713 , H04B1/7136 , H04B1/7143 , H04B1/715 , H04B7/204 , H04B7/26 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04W72/04 , H04W76/02 , H04J4/00 , H04J13/06
CPC分类号： H04W16/12 , H04B1/713 , H04B1/7143 , H04B1/715 , H04B7/2634 , H04W16/02 , H04B2001/7154 , H04W16/24 , H04W16/28
摘要： A multiple access communications system reuses a set of N carrier frequencies in adjacent communications sites to provide more than N minimally cross-correlated frequency-hopping communications channels. A first set of communications channels is associated with a first of the communications sites. No two of the channels in the first set employ the same frequency at the same time. A second set of communications channels is associated with a second of the adjacent communications sites. No two of the channels in the second set of channels employ the same one of the N carrier frequencies at the same time. One or more sets of the minimally cross-correlated channels are further defined so that none of the channels in such sets employ the same frequency at the same time as more than a predetermined number of the channels in another of the sets of the minimally cross-correlated frequency-hopping communications channels. The signal activity level of a frequency-hopped transmission is detected on one of the frequencies of the hopping pattern. The transmission is deactivated when the signal is silent. When signal activity resumes, the signal is transmitted with a new hopping sequence.
摘要翻译：多址通信系统在相邻通信站点中重新使用一组N个载波频率，以提供超过N个最小相关的跳频通信信道。第一组通信信道与第一通信站点相关联。第一组中没有两个通道同时使用相同的频率。第二组通信信道与第二个相邻通信站点相关联。第二组信道中没有两个信道同时使用相同的N个载波频率。进一步定义一组或多组最小交叉相关信道，使得这些集合中的信道中的任何一个信道在最小交叉相关信道中的另一组中的多于一个预定数量的信道的同时使用相同的频率，相关的跳频通信信道。在跳频图案的频率之一上检测跳频发送的信号活动度。当信号无声时，传输被禁用。当信号活动恢复时，信号以新的跳频序列传输。

4. 发明授权

US5737358A Multiplexed radio communication system 失效
标题翻译：多路复用无线电通信系统
公开(公告)号：US5737358A
公开(公告)日：1998-04-07
申请号：US382631
申请日：1995-02-02
申请人： Mordechai Ritz , Giora Silbershatz , Noam Livneh , George Calhoun , Oliver Hilsenrath
发明人： Mordechai Ritz , Giora Silbershatz , Noam Livneh , George Calhoun , Oliver Hilsenrath
IPC分类号： H04B1/713 , H04B1/7143 , H04B1/715 , H04B7/26 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04K1/00
CPC分类号： H04W16/12 , H04B1/713 , H04B1/7143 , H04B1/715 , H04B7/2615 , H04W16/02 , H04B2001/7154 , H04W16/24 , H04W16/28
摘要： A multiple access communications system reuses a set of either N carrier frequencies or time slots in adjacent communications sites to provide more than N or T minimally cross-correlated frequency or time hopping communications channels respectively. A first set of communications channels is associated with a first of the communications sites. No two of the channels in the first set employ the same frequency or T time slots at the same time. A second set of communications channels is associated with a second of the adjacent communications sites. No two of the channels in the second set of channels employ the same one of the N carrier frequencies or T time slots at the same time. One or more sets of the minimally cross-correlated channels are further defined so that none of the channels in such sets employ the same frequency at the same time as more than a predetermined number of the channels in another of the sets of the minimally cross-correlated frequency-hopping communications channels. This is accomplished by having such other sets be a decimated transformation of the first or second set respectively.
摘要翻译：多址通信系统在相邻通信站点中重复使用N个载波频率或时隙的集合，以分别提供多于N或T个最小相关的频率或跳频通信信道。第一组通信信道与第一通信站点相关联。第一组中没有两个通道同时使用相同的频率或T个时隙。第二组通信信道与第二个相邻通信站点相关联。第二组信道中没有两个信道同时使用N个载波频率或T个时隙中的相同的一个。进一步定义一组或多组最小交叉相关信道，使得这些集合中的信道中的任何一个信道在最小交叉相关信道中的另一组中的多于一个预定数量的信道的同时使用相同的频率，相关的跳频通信信道。这是通过使这样的其他集合分别是第一或第二集合的抽取变换来实现的。

5. 发明授权

US5678187A Method and apparatus for reducing interference in a radio communication link of a cellular communication system 失效
标题翻译：用于减少蜂窝通信系统的无线电通信链路中的干扰的方法和装置
公开(公告)号：US5678187A
公开(公告)日：1997-10-14
申请号：US491272
申请日：1995-06-16
申请人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
发明人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
IPC分类号： H04B20060101 , H04B7/00 , H04B10/00 , H04L25/49 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/06 , H04W36/20 , H04W36/30 , H04W84/04 , H04Q7/36
CPC分类号： H04W36/20 , H04W36/06 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/30 , H04W84/042
摘要： A method and apparatus is provided for reducing interference in a radio communication link from a central site (230) to a mobile unit (228) in a cellular communication system. The central site (230) includes a first (202) and a second (216) antenna which serve the geographic region (214) in which the mobile unit (228) is located. The radio communication link may be provided by communicating a signal in a first radio communication channel between the first central site antenna (202) and the mobile unit (228). Similarly, the radio communication link may be provided by communicating a signal in a second radio communication channel between the second central site antenna (216) and the mobile unit (228). A measure of interference in the first radio communication channel providing the radio communication link is determined. The radio communication link is switched, in response to the measure of interference being above a predetermined threshold, from the first to the second radio communication channel.
摘要翻译：提供了一种用于减少在蜂窝通信系统中从中心站点（230）到移动单元（228）的无线电通信链路中的干扰的方法和装置。中心站点（230）包括用于移动单元（228）所在的地理区域（214）的第一（202）和第二（216）天线。可以通过在第一中心站点天线（202）和移动单元（228）之间的第一无线电通信信道中传送信号来提供无线电通信链路。类似地，可以通过在第二中心站点天线（216）和移动单元（228）之间的第二无线电通信信道中传送信号来提供无线电通信链路。确定提供无线电通信链路的第一无线电通信信道中的干扰的度量。响应于干扰的测量高于预定阈值，无线电通信链路从第一无线电通信信道切换到第二无线电通信信道。

6. 发明授权

US5809401A Method and apparatus for reducing interference in a radio communication link of a cellular communication system 失效
公开(公告)号：US5809401A
公开(公告)日：1998-09-15
申请号：US834948
申请日：1997-04-07
申请人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
发明人： Reuven Meidan , Noam Livneh , Giora Silbershatz , Mordechai Ritz
IPC分类号： H04B20060101 , H04B7/00 , H04B10/00 , H04L25/49 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/06 , H04W36/20 , H04W36/30 , H04W84/04 , H04B15/00 , H04B1/38 , H04M1/00
CPC分类号： H04W36/20 , H04W36/06 , H04W16/14 , H04W16/24 , H04W24/00 , H04W36/30 , H04W84/042
摘要： A method and apparatus is provided for reducing interference in a radio communication link from a central site (230) to a mobile unit (228) in a cellular communication system. The central site (230) includes a first (202) and a second (216) antenna which serve the geographic region (214) in which the mobile unit (228) is located. The radio communication link may be provided by communicating a signal in a first radio communication channel between the first central site antenna (202) and the mobile unit (228). Similarly, the radio communication link may be provided by communicating a signal in a second radio communication channel between the second central site antenna (216) and the mobile unit (228). A measure of interference in the first radio communication channel providing the radio communication link is determined. The radio communication link is switched, in response to the measure of interference being above a predetermined threshold, from the first to the second radio communication channel.

7. 发明授权

US5408496A Spread-spectrum, frequency-hopping radiotelephone system 失效
标题翻译：扩频，跳频无线电话系统
公开(公告)号：US5408496A
公开(公告)日：1995-04-18
申请号：US80075
申请日：1993-06-18
申请人： Mordechai Ritz , Noam Livneh , Giora Silbershatz
发明人： Mordechai Ritz , Noam Livneh , Giora Silbershatz
IPC分类号： H04B1/713 , H04B1/7136 , H04B1/7143 , H04B1/715 , H04B7/204 , H04B7/26 , H04W16/02 , H04W16/12 , H04W16/24 , H04W16/28 , H04W72/04 , H04W76/02 , H04L27/30
CPC分类号： H04W16/12 , H04B1/713 , H04B1/7143 , H04B1/715 , H04B7/2634 , H04W16/02 , H04B2001/7154 , H04W16/24 , H04W16/28
摘要： A multiple access communications system reuses a set of N carrier frequencies in adjacent communications sites to provide more than N minimally cross-correlated frequency-hopping communications channels. A first set of communications channels is associated with a first of the communications sites. No two of the channels in the first set employ the same frequency at the same time. A second set of communications channels is associated with a second of the adjacent communications sites. No two of the channels in the second set of channels employ the same one of the N carrier frequencies at the same time. One or more sets of the minimally cross-correlated channels are further defined so that none of the channels in such sets employ the same frequency at the same time as more than a predetermined number of the channels in another of the sets of the minimally cross-correlated frequency-hopping communications channels.
摘要翻译：多址通信系统在相邻通信站点中重新使用一组N个载波频率，以提供超过N个最小相关的跳频通信信道。第一组通信信道与第一通信站点相关联。第一组中没有两个通道同时使用相同的频率。第二组通信信道与第二个相邻通信站点相关联。第二组信道中没有两个信道同时使用相同的N个载波频率。进一步定义一组或多组最小交叉相关信道，使得这些集合中的信道中的任何一个信道在最小交叉相关信道中的另一组中的多于一个预定数量的信道的同时使用相同的频率，相关的跳频通信信道。

8. 发明授权

US5838673A Radio telephone system for minimizing co-channel interference utilizing geographic separation of signals and transmission power control 失效
标题翻译：无线电话系统，用于利用信号的地理分离和传输功率控制来最小化同频干扰
公开(公告)号：US5838673A
公开(公告)日：1998-11-17
申请号：US557030
申请日：1996-07-02
申请人： Mordechai Ritz , Giora Silbershatz , Shmuel Miller
发明人： Mordechai Ritz , Giora Silbershatz , Shmuel Miller
IPC分类号： H04B7/005 , H04B1/713
CPC分类号： H04W52/143 , H04W52/146 , H04W52/24 , Y02B60/50
摘要： A system for minimizing co-channel interference between transmission sectors at their common periphery. The system exploits the geographic separation of potentially interfering mobile transmitters and utilizes transmission power control. The system employs sectored antennas in a combined frequency hopping, TDMA system wherein each subscriber in a particular sector is assigned a time slot in the system based upon that subscriber's geographic location within that sector. The transmission power in the sector is reduced during certain predetermined time slots and subscribers who are remote from the fringe of the sector are assigned to these power reduced time slots. During up-link the transmission power for subscribers located proximal to the fringe are reduced to cause less co-channel interference between their signals and the signals from other subscribers in different sectors having the same time slot.
摘要翻译： PCT No.PCT / US94 / 14562 Sec。 371日期：1996年7月2日 102（e）日期1996年7月2日PCT 1994年12月16日PCT PCT。出版物WO95 / 17048 日期1995年6月22日一种用于最小化其通用外围的传输扇区之间的同频干扰的系统。该系统利用潜在干扰移动发射机的地理分离，并利用发射功率控制。该系统在组合的跳频TDMA系统中采用扇形天线，其中特定扇区中的每个用户基于该用户在该扇区内的地理位置在系统中分配时隙。在某些预定时隙期间扇区中的发射功率减小，并且远离扇区边缘的用户被分配给这些功率减少的时隙。在上行链路期间，减少了位于边缘附近的用户的发射功率，从而在其信号与来自具有相同时隙的不同扇区中的来自其他用户的信号之间造成较少的同信道干扰。

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