专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4775995A Adaptive splatter control 失效
标题翻译：自适应喷溅控制
公开(公告)号：US4775995A
公开(公告)日：1988-10-04
申请号：US945041
申请日：1986-12-22
申请人： Ronald H. Chapman , John S. Ruppel , Anthony P. van den Heuvel , Jona Cohn
发明人： Ronald H. Chapman , John S. Ruppel , Anthony P. van den Heuvel , Jona Cohn
IPC分类号： H04W52/00 , H04W88/02 , H01Q7/04
CPC分类号： H04W88/02 , H04W52/0206
摘要： An improved arrangement and method for use in a radio communication system is disclosed which makes possible mobile radio channel assignments on narrower channel spacings with a minimum amount of adjacent channel interference or splatter occurring at an included base station receiver. In a first embodiment, the mobile radios modify at least one transmission parameter, such as maximum allowable deviation, a given amount of transmitter output power, and a modulation limiting bandwidth, if a processed value of receive signal strength exceeds at least one predetermined threshold value. The processed value of receive signal strength is taken from a plurality of sampled and stored receive signal strength values in the mobile radio. By determining that the processed value of receive signal strength exceeds a predetermined threshold value, the mobile radio is able to adaptively control the amount of splatter caused at the base station, thus keeping the amount of splatter within acceptable levels.In a second embodiment, the improved arrangement and method incorporated in a mobile radio progressively adapts the transmission parameters upon determining that the processed value of receive signal strength exceeds a first, a second, and a third threshold value to effect reduced maximum allowable deviation only, reduce the maximum allowable deviation and power output only, or to reduce the maximum allowable deviation, power output, and modulation limiting bandwidth upon exceeding one, two, or all of these threshold values.Moreover, in each of these embodiments, the base station includes apparatus and a method for compensating the level and bandwidth of recovered audio by sensing the relative level of received signal strength in the base station receiver.
摘要翻译：公开了一种在无线电通信系统中使用的改进的布置和方法，其使得在较窄的信道间隔处可能的移动无线电信道分配具有在所包括的基站接收机处发生的最小量的相邻信道干扰或飞溅。在第一实施例中，如果接收信号强度的处理值超过至少一个预定阈值，则移动无线电修改至少一个传输参数，例如最大允许偏差，给定量的发射机输出功率和调制限制带宽。接收信号强度的处理值取自移动无线电中的多个采样和存储的接收信号强度值。通过确定接收信号强度的处理值超过预定阈值，移动无线电能够自适应地控制在基站处引起的飞溅量，从而将飞溅量保持在可接受的水平内。在第二实施例中，结合在移动无线电中的改进的布置和方法在确定接收信号强度的处理值超过第一阈值，第二阈值和第三阈值以逐渐减小最大允许偏差量后逐渐适应传输参数，减少最大允许偏差和功率输出，或者在超过这些阈值超过一个，两个或全部时，减少最大允许偏差，功率输出和调制限制带宽。此外，在这些实施例的每一个中，基站包括用于通过感测基站接收机中的接收信号强度的相对电平来补偿恢复的音频的电平和带宽的装置和方法。

2. 发明授权

US4363129A Method and means of minimizing simulcast distortion in a receiver when using a same-frequency repeater 失效
标题翻译：当使用同频中继器时，在接收机中最小化联播失真的方法和方法
公开(公告)号：US4363129A
公开(公告)日：1982-12-07
申请号：US215589
申请日：1980-12-11
申请人： Jona Cohn , Allen L. Davidson , Anthony P. van den Heuvel
发明人： Jona Cohn , Allen L. Davidson , Anthony P. van den Heuvel
IPC分类号： H04B7/155 , H04B7/26 , H04B14/00 , H04H20/67 , H04B7/16
CPC分类号： H04H20/67 , H04B14/006 , H04B7/15528 , H04B7/2625
摘要： Simulcast distortion in a receiver when using a same-frequency repeater is minimized by applying double modulation to a signal that is broadcast to the same-frequency repeater. A voice signal is applied without delay as AM on a carrier to a modulation index of up to 30%, and the same signal is also applied as FM on the same carrier with a time delay equal to the time delay in the same-frequency repeater. The same-frequency repeater detects the AM and applies the detected signal as FM on a carrier that is rebroadcast. Received FM signals are thus delayed by substantially the same amount whether they are received from the original broadcast or the same-frequency repeater.
摘要翻译：通过对广播到同频中继器的信号应用双调制来最小化接收机中使用同频中继器时的模拟失真。无延迟地将语音信号作为载波上的AM施加到高达30％的调制指数，并且相同的信号也作为FM施加在同一载波上，时间延迟等于同频中继器中的时间延迟。相同频率的中继器检测到AM，并将检测到的信号作为FM进行重播。因此，无论接收到的FM信号是从原始广播还是从同频中继器接收到的，FM信号都被延迟了大致相同的量。

3. 发明授权

US4317217A Tag generator for a same-frequency repeater 失效
标题翻译：用于同频中继器的标签发生器
公开(公告)号：US4317217A
公开(公告)日：1982-02-23
申请号：US176895
申请日：1980-08-11
申请人： Allen L. Davidson , Jona Cohn
发明人： Allen L. Davidson , Jona Cohn
IPC分类号： H04B7/155 , H04B7/14
CPC分类号： H04B7/15564 , H04B1/525
摘要： Spillover of RF signal from the output of a same-frequency repeater to the input is reduced by attaching a tag to the output signal. The tag is double-sideband, suppressed carrier to place two spectral spikes, one above and one below the carrier. The tag is applied to the signal in the IF. A tagged signal of variable amplitude and phase is added to the received signal so as to cancel the tag and hence the spillover signal, leaving only the desired signal. A feedback system controls the amplitude and phase of the cancelling signal.
摘要翻译：通过将标签附加到输出信号来减少从同频转发器的输出到输入的RF信号的溢出。标签是双边带，抑制载波放置两个光谱峰值，一个在载波上方和一个。标签被应用于IF中的信号。将可变幅度和相位的标记信号添加到接收信号，以便消除标签并因此消除溢出信号，仅留下期望的信号。反馈系统控制消除信号的幅度和相位。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式