公开(公告)号：WO1993002512A1

公开(公告)日：1993-02-04

申请号：PCT/US1992005885

申请日：1992-07-14

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  PAGGEOT, Bruce, M. ,  TRIPP, Jeffrey, W. ,  MARRY, Patrick, J.

IPC: H04J03/24

CPC classification number: H04W88/02 ,  H04L12/40006 ,  H04L12/40163 ,  H04L12/4035 ,  H04L12/4135

Abstract: Data transfer apparatus (211, 213) for a radiotelephone peripheral using a time multiplexed data bus for communication with a bus master of the radiotelephone (201) couples peripheral devices external to the radiotelephone (201) and other user information inputting devices, such as a handset (203) for a cellular mobile radiotelephone, to the radiotelephone's central processor and speech processor (207). The data transfer apparatus generates time slots in frame formats in which the information is sent over the data bus. The entire message, information bits and the header, sent in a time slot from a peripheral device to the bus master is used to determine bus contention. Bus contention resolution during the start-up of data bus operation sets the priority with respect to other data transfer apparati with which a peripheral device's data transfer apparatus is able to access the bus during normal operation.

公开(公告)号：WO1992020144A1

公开(公告)日：1992-11-12

申请号：PCT/US1992002916

申请日：1992-04-06

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  HIETALA, Alexander, W. ,  MARRY, Patrick, J.

IPC: H03C30/09

CPC classification number: H03C3/0933 ,  H03C3/0925 ,  H03D7/163 ,  H03L7/1976

Abstract: A fractional-N frequency synthesizer (103), realizes automatic frequency control by adding in a modulation processing circuit (215) a digital representation of a determined frequency offset to a digital representation of applied modulation to create the modulus control of a programmable frequency divider (203).

公开(公告)号：WO1993023963A1

公开(公告)日：1993-11-25

申请号：PCT/US1993003692

申请日：1993-04-19

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BUSSAN, Christopher, F. ,  MARRY, Patrick, J. ,  RABE, Duane, C. ,  BINZEL, Charles, P. ,  ARORA, Arvind, S.

IPC: H04Q07/02

CPC classification number: H04W72/085 ,  H03J1/0091 ,  H04B1/26

Abstract: A circuit and method for selecting tuning of a radio receiver to a frequency channel of a set of frequency channels. The radio receiver scans selected control channels and measures the power levels of signals generated upon control channels. Only when the measured power levels (684) of the signals generated upon the respective ones of the control channels are in excess of a certain power level is a communication link attempted to be effectuated with a transmitter of such data signals (696). When a communication link cannot be effectuated, the radio receiver powers down (708) for a predetermined time period, then powers on again (710), and the power levels of signals transmitted upon the control channels are again measured (710). Effectuation of a communication link with a transmitter which transmits a signal upon one of the control channels is attempted if the measured power level on such control channel increases beyond a certain amount.

公开(公告)号：WO1993022881A1

公开(公告)日：1993-11-11

申请号：PCT/US1993003301

申请日：1993-04-08

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  MARRY, Patrick, J. ,  SCHUSTER, David, C. ,  GOULD, Adam, F.

IPC: H04Q07/00

CPC classification number: H04B1/1027 ,  H04B17/23 ,  H04B17/309 ,  H04B17/318 ,  H04B17/345

Abstract: An apparatus, and associated method, for determining signal transmission quality levels of a discretely-encoded information signal received by a receiver. The signal strength of the received signal is calculated, and the levels of interference introduced upon the information signal is determined. The value of the signal strength is weighted by the amount of interference introduced upon the information signal. The resultant weighted signal forms the signal transmission quality level. The value of the signal transmission quality level is displayed to provide a user with a quantitative indication of the signal transmission quality level of the signal received by the receiver.

Abstract translation: 一种用于确定由接收机接收的离散编码的信息信号的信号传输质量水平的装置和相关方法。 计算接收信号的信号强度，确定信息信号引入的干扰电平。 信号强度的值由信息信号引入的干扰量加权。 所得到的加权信号形成信号传输质量水平。 显示信号传输质量等级的值以向用户提供由接收机接收的信号的信号传输质量等级的定量指示。

公开(公告)号：WO1988010541A1

公开(公告)日：1988-12-29

申请号：PCT/US1988001882

申请日：1988-06-02

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  MARRY, Patrick, J. ,  WILSON, Gregory, P. ,  HOUGHTON, Michael, W. ,  WELLENSTEIN, Neil, N.

IPC: H04K01/04

CPC classification number: H04K1/04

Abstract: An analog frequency inversion scrambler employing an exchange of random number seeds between an originating scrambler (103) and an answering scrambler (107) to create two pseudo-ramdom frequency hopping rolling codes has been disclosed. The rolling code used in one direction of a duplex channel is different than the rolling code in the opposite direction and each code is synchronized by periodic synchronization signals.