会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 41. 发明授权
    • Method of transmitting low-power frequency hopped spread spectrum data
    • 低功率跳频扩频数据传输方法
    • US5546422A
    • 1996-08-13
    • US362114
    • 1994-12-22
    • Hanoch YokevHaim HarelYehouda Meiman
    • Hanoch YokevHaim HarelYehouda Meiman
    • G01S1/02G01S3/02G01S3/04G01S3/10G01S5/00G01S5/02G01S5/04G01S19/25G01S19/27H04B1/713H04B1/7156H04B7/26H04W64/00H04W84/02H04W88/02
    • H04W64/00G01S1/026G01S3/023G01S3/043G01S3/10G01S5/0009G01S5/021G01S5/04H04B1/713H04B1/7156H04B7/2681H04B7/2693H04L5/0053H04W84/025H04L5/0007H04L5/0062H04L5/0091H04W88/022
    • An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion. The base receiving unit employs special algorithms for retrieving very low power acknowledgement paging messages in a noisy environment by using data redundancy, data interleaving, soft decoding and error correction codes to strip the bi-phase-modulated, frequency-hopped spread-spectrum digital data transmitted from the remote pocket pagers. A history of the frequency and phase drift is used during reception of the acknowledgement messages to predict the phase and frequency drift of the encoded digital information to further reduce decoding error. Signal to noise ratios are determined for each frequency hop and relatively noisy hops are discarded or minimized in a soft decoding process based redundancy of data bits.
    • 描述了一种确认寻呼系统,其适合于寻呼网络的现有基础设施,并且在远距离执行确认寻呼的同时提供低成本的制造和低功率操作。 确认寻呼系统由标准寻呼发射机和使用跳频扩频差分双相移键控通信响应寻呼的多个远程寻呼单元组成。 多个寻呼机被分配给组,其中每个组被分配在确定跳频的公共重复伪随机噪声码中的单独的起始位置。 寻呼机的分组使组之间的确认传输的冲突最小化,并且使得大量寻呼单元能够在单个地理区域内操作。 寻呼机包括一个特殊的双回路PLL合成器,以产生精确的窄带频率,并以快速方式改变或跳频。 基站接收单元采用特殊算法,通过使用数据冗余,数据交织,软解码和纠错码来消除双相调制的跳频扩频数字数据,在噪声环境中检索极低功率的确认寻呼消息 从远程口袋传呼机传输。 在接收确认消息期间使用频率和相位漂移的历史来预测编码的数字信息的相位和频率漂移以进一步减少解码错误。 针对每个跳频确定信噪比,并且在基于软解码过程的数据比特冗余中丢弃或最小化相对噪声的跳。
    • 50. 发明授权
    • Remote unit for use with remote pager
    • 遥控单元,用于远程寻呼机
    • US5519718A
    • 1996-05-21
    • US363288
    • 1994-12-22
    • Hanoch YokevHaim HarelYehouda Meiman
    • Hanoch YokevHaim HarelYehouda Meiman
    • G01S1/02G01S3/02G01S3/04G01S3/10G01S5/00G01S5/02G01S5/04G01S19/25G01S19/27H04B1/713H04B1/7156H04B7/26H04W64/00H04W84/02H04W88/02
    • H04W64/00G01S1/026G01S3/023G01S3/043G01S3/10G01S5/0009G01S5/021G01S5/04H04B1/713H04B1/7156H04B7/2681H04B7/2693H04L5/0053H04W84/025H04L5/0007H04L5/0062H04L5/0091H04W88/022
    • An acknowledgement paging system is described which fits within the existing infrastructure of a paging network and which provides low cost manufacture and low power operation while still enabling the acknowledgement paging over long distances. The acknowledgement paging system consists of a standard paging transmitter and a plurality of remote paging units which respond to a page using frequency-hopped spread-spectrum differential bi-phase shift keying communications. The plurality of pagers are assigned to groups with each group being assigned a separate starting location in a common, repeating pseudo-random noise code which determines the frequency hops. The grouping of pagers minimizes the collisions of acknowledgment transmissions between groups and the enables a large number of paging units to operate within a single geographic area. The pagers include a special double loop PLL synthesizer to produce an accurate narrow band frequency and to change or hop frequencies in a rapid fashion. The base receiving unit employs special algorithms for retrieving very low power acknowledgement paging messages in a noisy environment by using data redundancy, data interleaving, soft decoding and error correction codes to strip the bi-phase-modulated, frequency-hopped spread-spectrum digital data transmitted from the remote pocket pagers. A history of the frequency and phase drift is used during reception of the acknowledgement messages to predict the phase and frequency drift of the encoded digital information to further reduce decoding error. Signal to noise ratios are determined for each frequency hop and relatively noisy hops are discarded or minimized in a soft decoding process based redundancy of data bits.
    • 描述了一种确认寻呼系统,其适合于寻呼网络的现有基础设施,并且在远距离执行确认寻呼的同时提供低成本的制造和低功率操作。 确认寻呼系统由标准寻呼发射机和使用跳频扩频差分双相移键控通信响应寻呼的多个远程寻呼单元组成。 多个寻呼机被分配给组,其中每个组被分配在确定跳频的公共重复伪随机噪声码中的单独的起始位置。 寻呼机的分组使组之间的确认传输的冲突最小化,并且使得大量寻呼单元能够在单个地理区域内操作。 寻呼机包括一个特殊的双回路PLL合成器,以产生精确的窄带频率,并以快速方式改变或跳频。 基站接收单元采用特殊算法,通过使用数据冗余,数据交织,软解码和纠错码来消除双相调制的跳频扩频数字数据,从而在嘈杂的环境中检索极低功率的确认寻呼消息 从远程口袋传呼机传输。 在接收确认消息期间使用频率和相位漂移的历史来预测编码的数字信息的相位和频率漂移以进一步减少解码错误。 针对每个跳频确定信噪比,并且在基于软解码处理的数据比特冗余中丢弃或最小化相对噪声的跳。