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1. 发明公开

EP1728318A1 METHOD AND SYSTEM OF REDUCING COLLISIONS IN AN ASYNCHRONOUS COMMUNICATION SYSTEM 无效转让
标题翻译：方法和装置在异步减少通信系统中碰撞
公开(公告)号：EP1728318A1
公开(公告)日：2006-12-06
申请号：EP05725133.2
申请日：2005-03-10
申请人： MOTOROLA, INC.
发明人： CARSELLO, Stephen, R. , RAINBOLT, Bradley, J.
IPC分类号： H03D1/00 , H04L27/06
CPC分类号： H04L12/56 , H04W52/0229
摘要： A method (60 or 70) and system of reducing collisions in an asynchronous communication system can include the steps at a transmitter (200) of generating (61) a set of known preamble waveforms and transmitting (64) at least one distinguishable preamble waveform based on an association with a call type and a receiver identifier. The method (70) can also include the steps at a receiver (300) of receiving (71) at least one preamble waveform among a set of different preamble waveforms which toggle between two symbol frequencies, the different preamble waveforms being distinguishable by at least having one among a different symbol frequency spacing and a different symbol toggling duty cycle. The method further includes the step of selecting (73) to decode a preamble waveform based on at least one among the different symbol frequency spacing and the different symbol toggling duty cycle.
摘要翻译：减少在异步通信系统中的冲突的方法（60或70）和系统可以包括在生成的发送器（200）（61）根据一组已知的前同步码的波形和发射（64）的至少一个可区分前导码波形的步骤在与一个呼叫类型和接收器标识符相关联。因此，该方法（70）可以包括接收一组不同的前同步信号波形哪两个符号频率之间切换的间（71）的至少一个前导码波形的接收器（300）中的步骤，不同的前同步信号波形由至少具有是可区分一个不同的符号频率间隔和不同的符号反复占空比之间。该方法包括进一步的选择（73）的步骤来解码基于至少一个不同的码元频率间隔间和不同的符号切换占空比的前导码波形。

2. 发明公开

EP1623546A2 METHOD AND WIRELESS DEVICE EMPLOYING A PREAMBLE TO INITIATE COMMUNICATIONS 无效转让
标题翻译：方法和无线设备以介绍序言通信
公开(公告)号：EP1623546A2
公开(公告)日：2006-02-08
申请号：EP04760576.1
申请日：2004-04-23
申请人： MOTOROLA, INC.
发明人： CARSELLO, Stephen, R.
IPC分类号： H04L27/06 , H04L27/20 , H03D1/00
CPC分类号： H04L27/0014 , H04L7/027 , H04L7/042 , H04L7/06 , H04L2027/0026 , H04W52/0229 , H04W68/00
摘要： A wireless receiver 300 and corresponding method to detect a message identifier or preamble that has been generated and provided by a transmitter 200 uses FFTs to estimate frequency and time offset. The wireless receiver 300 scans, asynchronously and sequentially during a wakeup time, a plurality of predetermined frequencies for the message identifier or specialized preamble. A plurality of received sample sequences are collected, one received sample sequence collected at each of the plurality of predetermined frequencies. A correlation between data corresponding to the preamble and data corresponding to a received sample sequence is compared to a threshold value to determine when the preamble has been detected. The wireless receiver 300 is wakened from a low power mode when the preamble is detected.
摘要翻译：一种无线接收器300和对应的方法来检测一个消息标识符或没有已经产生前同步码和由发射器200使用快速傅里叶变换来估计频偏和时间设置。无线接收器300扫描，以异步方式和按顺序期间的唤醒时间，对于消息标识符或专门的前同步码的预定频率的复数。接收的采样序列的多个收集，在每个预定频率上的所述多个收集的一个接收的采样序列。当已经检测到前同步码数据对应于所述前导码和数据对应于一个接收的采样序列之间的相关性进行比较的阈值确定的矿井。无线接收器300从低功率模式当检测到前导码唤醒。

3. 发明公开

EP1611706A2 METHOD AND SYSTEM FOR SYNCHRONIZATION IN A FREQUENCY SHIFT KEYING RECEIVER 有权转让
标题翻译：方法和系统中的同步FREQUENZUMTASTEMPFÄNGER
公开(公告)号：EP1611706A2
公开(公告)日：2006-01-04
申请号：EP04758291.1
申请日：2004-03-24
申请人： MOTOROLA, INC.
发明人： CARSELLO, Stephen, R. , GOLDBERG, Mark, A.
IPC分类号： H04L7/00
CPC分类号： H04L7/042 , H04L7/08 , H04L27/10 , H04L2007/047 , H04L2027/0065 , H04L2027/0095
摘要： The invention provides a method and apparatus for timing and frequency synchronization during and after signal acquisition, respectively, in a digital communication receiver. The apparatus comprises: a receiver (110) receiving a plurality of data slots each containing a sync word (310); a correlator (220) forming multiple correlations of the received signal with a sinusoid of an expected frequency for each of the selected sync symbol intervals; a combiner (240) combining the multiple correlations according to the FSK modulation index ad known sync symbol pattern; a peak detector (230) forming a sync correlation signal of the maximum combiner output amplitude; a threshold detector (250) comparing the sync correlation signal to a threshold; a symbol timing estimator (270) establishing symbol timing based on the peak of the sync correlation signal; a frequency offset estimator (260); and a quality estimator (280) determining a quality of the frequency offset estimate using a SNR calculation.

4. 发明公开

EP1656734A2 INTERFERENCE ESTIMATION AND SCALING FOR EFFICIENT METRIC STORAGE AND INTERFERENCE IMMUNITY 无效
标题翻译：误差估计和范围;高效公制储存和抗干扰
公开(公告)号：EP1656734A2
公开(公告)日：2006-05-17
申请号：EP04780546.0
申请日：2004-08-09
申请人： MOTOROLA, INC.
发明人： RAINBOLT, Bradley, J. , CARSELLO, Stephen, R.
IPC分类号： H03K5/156 , H04B1/69 , H04L27/06 , H04B17/02
CPC分类号： H04B17/345 , H04B17/26
摘要： A system, wireless device (402) and method receive a set of soft metrics (614) associated with a block of symbols during a predetermined time interval, use the set of soft metrics (614) to form an initial interference power estimate, form a moving-average estimate of interference power (616) corresponding to each predetermined time interval, and scale the set of soft metrics (614) according to the corresponding interference power estimate resulting in a set of scaled metrics (618). Then they limit the dynamic range of the set of scaled metrics (618), linearly quantize the limited metrics, and output the linearly quantized limited metrics (628) to a memory buffer. The size of the memory buffer containing the linearly quantized limited metrics (628) is smaller than the size of a memory buffer required to store the received soft metrics (614). The linearly quantized limited metrics (628) are then used as input to a decoder.

5. 发明公开

EP1652172A2 METHOD AND APPARATUS FOR TERMINATING RECEPTION IN A WIRELESS COMMUNICATION SYSTEM 无效转让
标题翻译：方法和装置进行接收在无线通信系统终止
公开(公告)号：EP1652172A2
公开(公告)日：2006-05-03
申请号：EP04778694.2
申请日：2004-07-20
申请人： MOTOROLA, INC.
发明人： CARSELLO, Stephen, R.
IPC分类号： G10L15/04
CPC分类号： H04W52/0235 , Y02D70/00
摘要： A receiver front end ( 302 ) receives a known Stop Waveform ( 114 ) comprising a predetermined symbol pattern on a voice channel, the Stop Waveform sent at the end of a transmission. A processor ( 304 ) coupled to the receiver front end terminates ( 512 ) the reception of the voice channel in response to detecting the Stop Waveform. The processor computes ( 504 ) a plurality of characteristics derived from the received signal, including a carrier-to-noise ratio, a maximum normalized symbol correlation energy over all symbols of the Stop Waveform, and a number of small and a number of large normalized symbol energy values. The processor detects ( 506 ) the Stop Waveform by comparing the plurality of characteristics with a corresponding plurality of predetermined thresholds.

6. 发明公开

EP0635183A1 CODE DIVISION MULTIPLE ACCESS (CDMA) INBOUND MESSAGING SYSTEM UTILIZING RE-USE OF SEQUENCES 无效
标题翻译：重用序列的KODEMULTIPLEXVIELFACHZUGRIFF新闻系统。
公开(公告)号：EP0635183A1
公开(公告)日：1995-01-25
申请号：EP94905968.0
申请日：1993-12-27
申请人： MOTOROLA, INC.
发明人： AYERST, Douglas, I. , CARSELLO, Stephen, R. , GLOTZBACH, Warren, P.
IPC分类号： H04L27 , H04J13 , H04W16
CPC分类号： H04W16/12 , H04J13/16 , H04W16/02
摘要： A communication system for providing two-way communication comprises base stations (15) for transmitting and receiving information and a central controller (10) coupled to and controlling the base stations (15). The central controller (10) selectively assigns seeds to each of the base stations (15) in accordance with the information transmitted and received by the base stations (15).

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