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61. 发明专利

CA3014824A1 SYSTEMS AND METHODS FOR VERIFYING ACCEPTABLE PERFORMANCE OF A NETWORK IN A BUILDING 未知
公开(公告)号：CA3014824A1
公开(公告)日：2019-02-21
申请号：CA3014824
申请日：2018-08-21
申请人： PCTEL INC
发明人： ADAMS DAVID E , FOO SEATQUEN , KORI POORNIMA
IPC分类号： H04W24/08 , G01P13/02 , H04B17/309 , H04W4/024
摘要： Systems and methods for verifying acceptable performance of a wireless network in a region being tested are provided and can include an electronic device identifying a test location within the region, the electronic device guiding a user to the test location based on comparing a first GPS coordinate of the test location and a second GPS coordinate of the electronic device, and the electronic device automatically scanning the wireless network to capture quality parameters of a connection on the wireless network when the second GPS coordinate substantially matches the first GPS coordinate.

62. 发明专利

CA2754250A1 WAVEGUIDE OR SLOT RADIATOR FOR WIDE E-PLANE RADIATION PATTERN BEAMWIDTH WITH ADDITIONAL STRUCTURES FOR DUAL POLARIZED OPERATION AND BEAMWIDTH CONTROL 未知
公开(公告)号：CA2754250A1
公开(公告)日：2012-04-01
申请号：CA2754250
申请日：2011-09-30
申请人： PCTEL INC
发明人： GUNNELS ROBERT
IPC分类号： H01Q13/20 , H01Q9/16
摘要： An apparatus and method are provided for producing a wide E-plane half power beamwidth. The apparatus can include a dipole antenna and a complimentary slot antenna in an infinite ground plane. The apparatus can also include a waveguide with surrounding structure that can be adjusted to produce the desired half power beamwidth.

63. 发明专利

ES2341657T3 PROCEDIMIENTO Y APARATO DE MEDIDA E IDENTIFICACION DE TRANSMISORES DE INTERFERENCIA EN LA MISMA VIA GSM. 未知
公开(公告)号：ES2341657T3
公开(公告)日：2010-06-24
申请号：ES05712299
申请日：2005-02-02
申请人： PCTEL INC
发明人： PERIC SINISA
IPC分类号： H04B7/00 , H04B15/00 , H04W8/00 , H04W24/00 , H04W28/04 , H04W48/12 , H04W84/04 , H04W88/08
摘要： Un procedimiento para caracterizar componentes de estaciones base que transmiten por el mismo canal, interfiriendo así unos con otros, en una red celular inalámbrica GSM en la que una pluralidad de estaciones base transmiten, cada una, una señal multitrama 51 que incluye una pluralidad de ráfagas FCCH, una pluralidad de ráfagas SCH y una pluralidad de ráfagas BCCH, comprendiendo el procedimiento: a) recibir señales dentro de la zona de cobertura pretendida de la red celular inalámbrica GSM; b) correlacionar las señales recibidas con una señal de forma de onda de ráfaga FCCH para identificar un conjunto de picos de correlación de FCCH en la misma; c) para cada pico de correlación de FCCH dado dentro de dicho conjunto de picos de correlación de FCCH, generar datos que representan el tiempo de llegada y el nivel de potencia para el pico de correlación de FCCH dado, y añadir dichos datos a un archivo de datos; d) para al menos un pico de correlación de FCCH dado dentro de dicho conjunto de picos de correlación de FCCH, programar operaciones de decodificación de ráfagas SCH durante una ventana temporal obtenida del tiempo de llegada del pico de correlación de FCCH dado; e) realizar operaciones de detección y decodificación de ráfagas SCH sobre dichas señales durante cada ventana temporal programada en d) para identificar así datos de BSIC y datos de RFN codificados en una ráfaga SCH dada detectada dentro de dicha señal, y añadir datos de tiempo de llegada, dichos datos de BSIC y datos de número de trama basados en dichos datos de RFN para la ráfaga SCH dada al archivo de datos; y f) para cada ráfaga SCH dada detectada y decodificada satisfactoriamente en e), identificar una pluralidad de ventanas de tiempo de llegada dentro de la multitrama 51 basándose en los datos de tiempo de llegada y los datos de número de trama de la ráfaga SCH dada, y actualizar el archivo de datos para asociar los datos de BSIC y los datos de número de trama para la ráfaga SCH dada con los datos de nivel de potencia para cada pico de correlación de FCCH cuyo tiempo de llegada entre dentro de dicha pluralidad de ventanas de tiempo de llegada de la multitrama 51.

64. 发明专利

DE602005018902D1 未知
公开(公告)号：DE602005018902D1
公开(公告)日：2010-03-04
申请号：DE602005018902
申请日：2005-02-02
申请人： PCTEL INC
发明人： PERIC SINISA
IPC分类号： H04B15/00 , H04W8/00 , H04W24/00 , H04W28/04 , H04W48/12 , H04W84/04 , H04W88/08

65. 发明专利

DE69619447T2 未知
公开(公告)号：DE69619447T2
公开(公告)日：2002-11-21
申请号：DE69619447
申请日：1996-09-05
申请人： PCTEL INC
发明人： YEH HAN C , CHEN PETER C
IPC分类号： G06F3/05 , G06F13/00 , H03M1/66 , H04L13/08 , H04L69/40 , H04M11/00 , H04M11/06 , H03M1/00 , G06F13/38 , G06F5/06
摘要： An HSP communications system contains a host computer which executes a software modem program and a device containing a circular buffer and a D/A converter. Typically, the host executes update routines in response to interrupts from the device and writes to the circular buffer digital samples representing amplitudes of an analog signal complying with a desired communication protocol. The samples pass through the circular buffer to the D/A converter which converts the samples into an analog communication signal. In environments such as multi-tasking systems, the host may occasionally skip interrupts and not provide new samples when required. In this case, the D/A converter reuses samples in the circular buffer to generate a maintenance signal. The maintenance signal typically does not convey correct data but is sufficient to maintain a communication link and prevent a remote device from disconnecting or entering a retrain mode. To provide a smoother maintenance signal, the circular buffer's size contains samples for an integral number of periods at the carrier and baud frequency of the desired protocol. Error correction and retransmission replace incorrect or lost data.

66. 发明专利

AU6359600A Method and apparatus for data transmission 未知
公开(公告)号：AU6359600A
公开(公告)日：2001-02-13
申请号：AU6359600
申请日：2000-07-13
申请人： PCTEL INC
发明人： DRUCKER VITALY , GOLDSTEIN YURI , HANNA WILLIAM , OKUNEV YURI
IPC分类号： H04J11/00 , H04L1/08 , H04L27/26 , H04L27/28 , H04B1/38 , H04K1/10

67. 发明专利

AU2508900A Translation table design for a pcm modem 未知
公开(公告)号：AU2508900A
公开(公告)日：2000-08-18
申请号：AU2508900
申请日：2000-01-18
申请人： PCTEL INC
发明人： OKUNEV YURI , DRUCKER VITALY , WANG QIN , GOLDSTEIN YURI
IPC分类号： H03M7/50 , H04B14/04 , H04J3/12 , H04L25/49 , H04B1/38 , H04L23/02 , H04L27/10 , H04L27/04 , H04L27/36 , H04L27/20 , H04L23/00
摘要： Methods are provided for generating at least one translation table for a modem having a frame having a plurality of slots. DIL sequence information from another modem is used to generate ordered table of levels, and distances between adjacent levels of the ordered table for found for each slot. The distances are used to distinguish between slots subject to robbed bit signaling (RBS) and slots not subject to RBS, and the ordered tables are used to make a determination as to whether the DIL sequence information is A-law or mu-law information. Scaling factors are generated from the A-law/mu-law determination as well as from a PAD estimation, and the scaling factors are utilized in generating translation tables. A PAD estimation function is utilized in finding the PAD estimation.

68. 发明专利

CA2360780A1 CONSTELLATION DESIGN FOR A PCM MODEM 未知
公开(公告)号：CA2360780A1
公开(公告)日：2000-08-03
申请号：CA2360780
申请日：2000-01-18
申请人： PCTEL INC
发明人： DRUCKER VITALY , WANG QIN , GOLDSTEIN YURI , OKUNEV YURI
IPC分类号： H04B14/04 , H04L25/49 , H04L23/00 , H04L23/02 , H04L27/04 , H04L27/10 , H04L27/20 , H04L27/36
摘要： Modem constellations are designed by independently optimizing for each slot of a frame, the distances between constellation points used for that slot. A maximum number of points N(0) (824) are chosen having at least the minimum distance d0 without exceeding a power limitation Plim. Using N(0), an attemp t is made to increase the d0 in the constellation without exceeding Plim. Constellation may be further optimized by, where possible, decreasing N(0) (824) in a particular constellation without affecting the total data rate of the frame. Thus, a maximum potentially achievable data rate Rmax (830) is calculated given the number of points which are in each of the six constellations, and comparing Rmax to a standards-permitted data rate DR; an d then, if Rmax exceeds DR, by decreasing N(0) (824) in one or more constellations, provided the decrease in the number of points does not cause a recalculated Rmax to drop below DR. Further optimization is obtained by attempting to increase d0 in one or more slots by permitting that slot(s) to exceed Plim, provided the average power of the frame is not exceeded. This i s accomplished by finding the slot with the maximum error probability, increasing d0 for that slot (while maintaining N(0)) to thereby exceed frame power limitations for that slot, and checking to see whether the changes to the constellation in that slot violates the average frame power limitations. A simple system for checking average constellation power is also provided.

69. 发明专利

CA2360777A1 DISTINGUISHING RECEIVED A-LAW AND .MU.-LAW SIGNALS IN A PCM MODEM 未知
公开(公告)号：CA2360777A1
公开(公告)日：2000-08-03
申请号：CA2360777
申请日：2000-01-18
申请人： PCTEL INC
发明人： OKUNEV YURI , WANG QIN , DRUCKER VITALY , GOLDSTEIN YURI
IPC分类号： H03M7/50 , H04B14/04 , H04J3/12 , H04L25/49 , H04B1/38 , H04L23/00 , H04L23/02 , H04L27/04 , H04L27/10 , H04L27/20 , H04L27/36
摘要： A method in a modem having a frame having a plurality of slots, for determining whether incoming DIL sequence information contains A-law or mu-l aw is provided. From the DIL sequence information, an ordered table of levels f or each slot is generated. The levels of all non-robbed-bit slots are averaged, and average levels are subjected to an A-law/mu-law separation function. The separation function F1(n1,n2)=sum from i=n1 to i=n2 {L(i) - 2* [L(i-16]} effectively compares values of a first plurality of levels L(i) to twice the values of a second plurality of levels sixteen levels removed from the first plurality of levels (420). The sum is compared to a threshold (430), as the sum will be small for A-law values and large for mu-law values.

70. 发明专利

DE69132208D1 未知
公开(公告)号：DE69132208D1
公开(公告)日：2000-06-21
申请号：DE69132208
申请日：1991-03-14
申请人： PCTEL INC
发明人： HALLMAN H
IPC分类号： H04J3/12 , H04M11/06 , H04K1/00
摘要： Methods for embedding additional information (e.g. a password function) in a handshake of communicating modems is provided. An auxiliary packet containing the additional information is placed in the handshake sequence of an originating modem in such a manner that it cannot be confused by the receiving modem with other signals which are required to be sent by the originating modem in the modem handshake. The answering modem looks for the auxiliary packet, and if the auxiliary packet is not received, or if the information in the auxiliary packet is not sufficient to establish authorization, the answering modem causes the call to be dropped. In V.32 type modems, the auxiliary packet is placed by the originating modem somewhere in the training sequence (TRN) after the required twelve hundred eighty symbol intervals, and before the R2 sequence, and the auxiliary packet is generated in such a manner that it cannot be confused with the R2 sequence. In order to guarentee that the auxiliary packet is discernible and that no confusion with other signals is possible, the auxiliary packet is comprised of two multiplexed signals; an information signal at a 2400 bit/second rate which includes a burst flag, and an HDLC formatted start flag, password, check sum, and stop flag; and a 2400 bit/second R2 prevention signal which is coded to be compatible with the burst flag and to guarentee that regardless of the HDLC formatted signal, the composite auxiliary packet cannot constitute an R2 sequence.

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