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1. 发明授权

US5706428A Multirate wireless data communication system 失效
标题翻译：多速率无线数据通信系统
公开(公告)号：US5706428A
公开(公告)日：1998-01-06
申请号：US615408
申请日：1996-03-14
申请人： Jan Boer , Wilhelmus Josephus Diepstraten , Adriaan Kamerman , Hendrik van Bokhorst , Hans van Driest
发明人： Jan Boer , Wilhelmus Josephus Diepstraten , Adriaan Kamerman , Hendrik van Bokhorst , Hans van Driest
IPC分类号： H04B1/707 , H04L12/28 , H04L12/56 , H04Q1/30
CPC分类号： H04B1/707 , H04B2201/70703 , H04W28/22 , H04W4/12 , H04W84/12
摘要： A wireless LAN includes first stations adapted to operate at a 1 or a 2 Mbps data rate and second stations adapted to operate at a 1,2,5 or 8 Mbps data rate. The 1 and 2 Mbps rates use DBPSK and DQPSK modulation, respectively. The 5 and 8 Mbps rates use PPM/DQPSK modulation. All four data rates use direct sequence spread spectrum (DSSS) coding. All transmitted messages start with a preamble and header at the 1 Mbps rate. The header includes fields identifying the data rate for the data portion of the message, and a length field. For a 2 Mbps transmission the length field identifies the number of bytes in the data field. For a 5 or 8 Mbps the length field identifies the number of bytes in the data field which, if transmitted at 2 Mbps, would take the same transmission time of the data field, and is thus a fraction 2/5 or 2/8 of the actual number of the bytes. With this arrangements, all the stations are interoperable in a co-existent manner in the LAN.
摘要翻译：无线LAN包括适于以1或2Mbps数据速率操作的第一站和适于以1,2,5或8Mbps数据速率操作的第二站。 1和2Mbps速率分别使用DBPSK和DQPSK调制。 5和8 Mbps速率使用PPM / DQPSK调制。所有四种数据速率都使用直接序列扩频（DSSS）编码。所有发送的消息以1 Mbps速率从前同步码和报头开始。标题包括标识消息的数据部分的数据速率的字段和长度字段。对于2Mbps传输，长度字段标识数据字段中的字节数。对于5或8 Mbps，长度字段标识数据字段中的字节数，如果以2 Mbps发送，则将占用数据字段的相同传输时间，因此为小数+ E，fra 2/5 + EE或+ E，fra 2/8 + EE的实际字节数。通过这种安排，所有的台站可以在局域网中以共存的方式进行互操作。

2. 发明授权

US5987033A Wireless lan with enhanced capture provision 失效
标题翻译：无线网络具有增强的捕获条件
公开(公告)号：US5987033A
公开(公告)日：1999-11-16
申请号：US925416
申请日：1997-09-08
申请人： Jan Boer , Hendrik van Bokhorst , Wilhelmus Josephus Diepstraten , Adriaan Kamerman , Rienk Mud , Hans van Driest , Robert John Kopmeiners
发明人： Jan Boer , Hendrik van Bokhorst , Wilhelmus Josephus Diepstraten , Adriaan Kamerman , Rienk Mud , Hans van Driest , Robert John Kopmeiners
IPC分类号： H04L12/28 , H04B7/00 , H04L12/413 , H04Q7/00
CPC分类号： H04W74/0816 , Y02B60/50
摘要： A receiver, and a method for operating the receiver, for a station in a wireless local area network using a common wireless communication channel and employing a CSMA/CA (carrier sense multiple access with collision avoidance) protocol includes various modes. In normal mode, the receiver follows typical states in order to detect a message and demodulate data from the message properly. Meanwhile, a process implements a message-in-message (MIM) mode when an energy increase above a specified level is detected. While in the MIM mode, if a carrier is detected, the energy increase is caused by a new message; otherwise, the energy increase is caused by an interfering station. If the carrier is detected, the receiver begins retraining so that it can start receiving the new message as soon as the first message ends. If no carrier is detected, the receiver waits a specified time to detect a carrier or for the end of the first message, after which the receiver returns to the beginning of the normal mode. While in the normal mode, if a message is detected that is not addressed to the station, the receiver enters a hunt mode. While in the hunt mode, the receiver waits for the current message to finish. At the same time, a process implements retraining when both an energy increase above a specified level and a carrier are detected. If no carrier is detected within a specified time, or if the energy level decreases below the specified level, the receiver returns to the beginning of the normal mode.
摘要翻译：使用公共无线通信信道和采用CSMA / CA（具有冲突避免的载波侦听多路访问）协议的无线局域网中的站的接收机和操作接收机的方法包括各种模式。在正常模式下，接收机遵循典型状态，以便检测消息并正确地解调消息中的数据。同时，当检测到高于指定电平的能量增加时，处理实现消息消息（MIM）模式。在MIM模式下，如果检测到载波，则能量增加是由新信息引起的; 否则，能量增加是由干扰站造成的。如果检测到载波，则接收机开始重新训练，以便在第一个消息结束时，它可以开始接收新消息。如果没有检测到载波，则接收机等待指定的时间来检测载波或第一个消息的结束，接收机返回到正常模式的开始。在正常模式下，如果检测到没有寻址到站的消息，则接收机进入寻线模式。在寻线模式下，接收机等待当前消息完成。同时，当检测到高于指定水平的能量增加和载波时，过程实施再训练。如果在指定时间内没有检测到载波，或者能量水平降低到指定的电平以下，则接收机返回正常模式的开始。

3. 发明授权

US5369639A Local area network having a wireless transmission link 失效
标题翻译：具有无线传输链路的局域网
公开(公告)号：US5369639A
公开(公告)日：1994-11-29
申请号：US633691
申请日：1990-12-24
申请人： Adriaan Kamerman , Hendrik van Bokhorst
发明人： Adriaan Kamerman , Hendrik van Bokhorst
IPC分类号： H04L12/28 , H04J6/00
CPC分类号： H04W74/0825
摘要： A local area network station (12) includes a transceiver (20) adapted to transmit and receive signals over a wireless communications link. The transceiver (20) is coupled to a CSMA/CD LAN controller device (22) and to a signal generator circuit (40) which is also coupled to the LAN controller device (22). If the station (12) desires to transmit a data frame but a carrier sense signal (CRS) indicates that the link is busy, transmission of the data frame is deferred, and after the carrier sense signal (CRS) becomes inactive, a collision is simulated by the signal generator circuit (40) providing a CDT signal to the LAN controller device (22) which goes into a backoff mode and attempts to retransmit the frame after a random backoff time. Thus, commercially available CSMA/CD chips can be utilized in a single wireless channel LAN environment using a CSMA/CA protocol, with a low risk of collisions.
摘要翻译：局域网站（12）包括适于通过无线通信链路发送和接收信号的收发器（20）。收发器（20）耦合到CSMA / CD LAN控制器设备（22）和耦合到LAN控制器设备（22）的信号发生器电路（40）。如果站（12）希望发送数据帧，但是载波侦听信号（CRS）指示链路正忙，则数据帧的传输被延迟，并且在载波感测信号（CRS）变为不活动之后，冲突是由信号发生器电路（40）模拟，该信号发生器电路（40）向进入退避模式的LAN控制器设备（22）提供CDT信号，并尝试在随机退避时间之后重新发送帧。因此，商业上可用的CSMA / CD芯片可以在具有低风险的冲突的CSMA / CA协议的单个无线信道LAN环境中使用。

4. 发明授权

US5164942A Antenna control for a wireless local area network station 失效
标题翻译：无线局域网网络的天线控制
公开(公告)号：US5164942A
公开(公告)日：1992-11-17
申请号：US633692
申请日：1990-12-24
申请人： Adriaan Kamerman , Hans van Driest
发明人： Adriaan Kamerman , Hans van Driest
IPC分类号： H04B7/08 , H04L12/28
CPC分类号： H04W74/085 , H04B7/0805
摘要： A local area network station (12) includes a transceiver (20) adapted to transmit and receive signals using electromagnetic radiation on a wireless communication link. The station (12) utilizes a CSMA/CD communications controller (22) in a CSMA/CA (collison avoidance) technique wherein deferred data frames are transmitted after a random number of backoff slots periods. A plurality of antennas (14, 16) is employed, with the antenna having the best receive conditions being selected for reception of a data frame. The antennas having a slotting control (200) which is synchronized with the backoff slotting to provide a short carrier detect time and hence high throughpout.

5. 发明授权

US5131006A Carrier detection for a wireless local area network 失效
标题翻译：无线局域网的载波检测
公开(公告)号：US5131006A
公开(公告)日：1992-07-14
申请号：US633568
申请日：1990-12-24
申请人： Adriaan Kamerman , Hans van Driest
发明人： Adriaan Kamerman , Hans van Driest
IPC分类号： H04B1/707 , H04B7/08
CPC分类号： H04B1/709 , H04B1/707 , H04B7/0805
摘要： A local area network (10) utilizes a wireless transmission link and has network stations (12) each having two differently polarized antennas (14, 16). Data transmission utilizes a spread spectrum code and in the receiver, correlator outputs are utilized in an integrator and registers circuit (54) to provide correlator output sample values integrated over a plurality of symbol intervals. These values are stored in registers (156) the contents of which are utilized to determine a peak value and a total value which are applied to a spike quality determination circuit (78) including a look-up table (200). The resultant spike quality output value represents the quality of the received signal and is utilized for carrier detection and for antenna selection.

6. 发明授权

US5909462A System and method for improved spread spectrum signal detection 失效
标题翻译：改进扩频信号检测的系统和方法
公开(公告)号：US5909462A
公开(公告)日：1999-06-01
申请号：US775737
申请日：1996-12-31
申请人： Adriaan Kamerman , Hans van Driest
发明人： Adriaan Kamerman , Hans van Driest
IPC分类号： H04L27/22 , H04L12/28 , H04B15/00
CPC分类号： H04B1/707
摘要： For use in a direct sequence spread spectrum ("DSSS") receiver adapted to receive a differential phase shift keyed ("DPSK") packet on a channel, the DPSK packet having a training preamble and a data portion, a system to improve detection of the packet under degraded channel conditions, comprising: (1) a detection circuit that derives phase information from symbols in the packet and a weight that is a function of an estimated power profile for the channel and (2) a computation circuit that computes a weighted average for the phase information using the weight, the weighted average being power profile-based to allow the receiver to detect the data contained in the packet more reliably under the degraded channel conditions.
摘要翻译：为了用于在信道上接收差分相移键控（“DPSK”）分组的直接序列扩频（“DSSS”）接收机，DPSK分组具有训练前同步码和数据部分，所述分组在恶化的信道条件下，包括：（1）从所述分组中的符号导出相位信息的检测电路和作为所述信道的估计功率分布的函数的权重，以及（2）计算加权的使用权重的相位信息的平均值，加权平均值是基于功率曲线的，以允许接收机在劣化信道条件下更可靠地检测包中包含的数据。

7. 发明授权

US5636247A Information transmission system 失效
标题翻译：信息传输系统
公开(公告)号：US5636247A
公开(公告)日：1997-06-03
申请号：US407829
申请日：1995-03-21
申请人： Adriaan Kamerman , Anjur S. Krishnakumar
发明人： Adriaan Kamerman , Anjur S. Krishnakumar
IPC分类号： H04J11/00 , H04L27/20 , H04L27/26 , H04K1/10
CPC分类号： H04L27/2602 , H04L27/2614
摘要： A system for transmitting information over an OFDM channel using phase shift keying encoding employs a bit mapping encoder to reduce the crest factor (ratio of peak voltage to RMS voltage). For a 16 subchannel OFDM system using QPSK encoding, a first set of four symmetrically positioned pairs of subchannels is used to encode two bits of information on each subchannel. A second set of four symmetrically positioned pairs of subchannels is used to encode only one bit of information on each subchannel, with the resultant phasor for each pair of the second set of pairs of subchannels being orthogonal to the resultant phasor for one of the pairs of the first set of subchannels. With this arrangement, the crest factor is reduced.
摘要翻译：通过使用相移键控编码在OFDM信道上传输信息的系统使用比特映射编码器来降低峰值因数（峰值电压与RMS电压的比率）。对于使用QPSK编码的16子信道OFDM系统，使用第一组四个对称定位的子信道对来对每个子信道上的两比特信息进行编码。第二组四个对称定位的子信道对被用于仅对每个子信道上的一个比特的信息进行编码，其中每对第二组子信道对的所得相量与所得到的相位对中的一个对第一组子通道。通过这种布置，波峰因数降低。

8. 发明申请

US20120269083A1 COMMUNICATION DEVICE 有权
标题翻译：通信设备
公开(公告)号：US20120269083A1
公开(公告)日：2012-10-25
申请号：US13510274
申请日：2009-11-20
申请人： Adriaan Kamerman
发明人： Adriaan Kamerman
IPC分类号： H04W24/00
CPC分类号： H04B7/0811 , H03F2200/294 , H04B1/109
摘要： The invention relates to a communication device (2) comprising an antenna system (4) provided with at least one antenna (6a, 6b, 6c) for receiving a radio signal and supplying a received radio signal to an output (8) of the antenna system, a low noise amplifier (10) for amplification of the received radio signal to obtain an amplified radio signal, and a processing unit (12) for processing the amplified radio signal. The antenna system (4) is configured to supply in a first state a first antenna signal as the received radio signal and in a second state second antenna signal as the received radio signal, wherein the first antenna signal and second antenna signal differ in amplitude. The antenna system is further configured to switch from state in response to a control signal (14) generated by the processing unit (12).
摘要翻译：本发明涉及一种包括天线系统（4）的通信设备（2），所述天线系统（4）设置有至少一个天线（6a，6b，6c），用于接收无线电信号，并将接收到的无线电信号提供给天线的输出（8）系统，用于放大接收到的无线电信号以获得放大的无线电信号的低噪声放大器（10），以及用于处理放大的无线电信号的处理单元（12）。天线系统（4）被配置为以第一状态提供作为所接收的无线电信号的第一天线信号，并且以第二状态提供第二天线信号作为所接收的无线电信号，其中第一天线信号和第二天线信号幅度不同。天线系统还被配置为响应于由处理单元（12）产生的控制信号（14）从状态切换。

9. 发明授权

US07463589B2 Wireless LAN with enhanced carrier sensing 有权
标题翻译：无线局域网具有增强的载波侦听功能
公开(公告)号：US07463589B2
公开(公告)日：2008-12-09
申请号：US09919051
申请日：2001-07-31
申请人： Wilhelmus Diepstraten , Adriaan Kamerman , Kai Roland Kriedte , D. J. Richard Van Nee
发明人： Wilhelmus Diepstraten , Adriaan Kamerman , Kai Roland Kriedte , D. J. Richard Van Nee
IPC分类号： H04J1/16 , H04J3/14 , H04J1/00 , H04L12/26
CPC分类号： H04W74/0808 , H04L27/2602 , H04W84/12 , H04W88/06
摘要： Medium access control device (301) for a mobile network station (3, 4, 5) or an access point (AP1) in a wireless local area network (1), having controlling means (302), processing means (303) and transmitting and receiving means (304); the controlling means (302) being arranged to control transmission and reception of radio frequency data signals containing data symbols; the transmitting and receiving means (304) being arranged for transmission and reception of electromagnetic data signals; the processing means (303) being arranged for detecting a first signal portion and a second signal portion in the received data signal, the second signal portion following the first signal portion and having a signal coding differing from a signal coding of the first signal portion.
摘要翻译：一种用于无线局域网（1）中的移动网络站（3,4,5）或接入点（AP1）的媒体接入控制设备（301），具有控制装置（302），处理装置（303）和传输和接收装置（304）。控制装置（302）被布置成控制包含数据符号的射频数据信号的发送和接收; 发送和接收装置（304）被布置用于发送和接收电磁数据信号; 处理装置（303）被布置用于检测接收数据信号中的第一信号部分和第二信号部分，第二信号部分跟随第一信号部分并且具有与第一信号部分的信号编码不同的信号编码。

10. 发明申请

US20050276241A1 Wireless LAN with fragmentation for bluetooth coexistence 审中-公开
标题翻译：无线局域网与蓝牙共存的碎片
公开(公告)号：US20050276241A1
公开(公告)日：2005-12-15
申请号：US10893987
申请日：2004-07-20
申请人： Adriaan Kamerman , Ernestus van der Horst , Roland Hellfajer , Christian Durdodt
发明人： Adriaan Kamerman , Ernestus van der Horst , Roland Hellfajer , Christian Durdodt
IPC分类号： H04L12/28 , H04L12/56 , H04W16/14 , H04W28/06 , H04W74/04 , H04W84/12 , H04W84/18 , H04Q7/00
CPC分类号： H04W28/06 , H04W16/14 , H04W74/04 , H04W84/12 , H04W84/18
摘要： Mutual interference experienced between co-located WLAN and BT devices is minimized. An improved wireless local area network (WLAN) scheme using fragmentation, that itself mitigates BLUETOOTH™—related interference, without relying on a presumed cooperation from co-located BLUETOOTH devices. The use of fragmentation in a WLAN network allows a longer concatenated period of WLAN activity, with corrupted segments being retried. Therefore, the chances of getting a full frame transferred during the repetitive interference by BT voice is greatly improved. A coexistence scheme is provided that is active in the MAC layer of a Wireless LAN (WLAN) device, aiming to make optimal use of the non-occupied BT slots for both uplink and downlink WLAN communication. The co-existence scheme improves throughput performance for active co-located WLAN and BT devices. Because the coexistence scheme is link-based instead of global and is enabled only when required, frame loss and fragmentation are minimized, leading to less network overhead.
摘要翻译：在同一个WLAN和BT设备之间经历的互相干扰最小化。使用分段的改进的无线局域网（WLAN）方案，其本身减轻了与蓝牙（Bluetooth）相关的干扰，而不依赖于来自共同定位的蓝牙设备的推定的合作。在WLAN网络中使用碎片允许WLAN活动的更长连接周期，重新尝试损坏的段。因此，在BT语音的重复干扰期间获得全帧传输的机会大大提高。提供了一种在无线LAN（WLAN）设备的MAC层中有效的共存方案，旨在最佳地利用上行和下行WLAN通信中的非占用BT时隙。共存方案提高了主动共同配置的WLAN和BT设备的吞吐量性能。因为共存方案是基于链路而不是全局的，并且仅在需要时被启用，所以帧丢失和分片被最小化，导致更少的网络开销。

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