公开(公告)号：WO1990014730A1

公开(公告)日：1990-11-29

申请号：PCT/US1990002472

申请日：1990-05-02

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LABEDZ, Gerald, P. ,  RABE, Duane, C.

IPC: H04M11/00

CPC classification number: H04B17/318

Abstract: There is provided a method of rapid Received Signal Strength Indication (RSSI) of a time-dispersed signal having echoes (where the time dispersal represents a significant fraction or more of the transmitted symbol interval). It comprises a sliding correlation (304) of a received signal against a known sequence or via channel sounding to obtain the time-dispersal function of the communications channel upon which the signal is transmitted and a summation of the squares of the quadrature components of the energies at relative maxima of the correlations (306) (correlation peaks determined with reference to a threshold level) (305) to integrate the energy defined by the correlation function to determine the energy present among the time-dispersed echoes utilizing the time-dispersal function. Thus, the energy present in the time-dispersed echoes is related to the received signal strength (307), the RSSI comprises a scalar of the energy present and the scalar comprises a function of the receiver's gain, RSSI determinations during any given interval are less dependent upon the ambulatory velocity of the receiver, and RSSI determinations of equivalent accuracy are obtained more rapidly or more accurate RSSI determinations are obtained per unit time.

公开(公告)号：WO1991007829A1

公开(公告)日：1991-05-30

申请号：PCT/US1990006389

申请日：1990-11-07

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LABEDZ, Gerald, P. ,  ATKINSON, Frederick, G. ,  RABE, Duane, C. ,  SCHULER, Joseph, J. ,  WERRONEN, Alton, P.

IPC: H04B07/08

CPC classification number: H04B7/0845 ,  H04B7/084 ,  H04B7/0857 ,  H04B7/0888 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (102, 103) is provided with a stored replica of expected reference information so that correlation with received time-dispersed signals (100, 101) produces an estimate of the transmission channel's impulse response as seen by each branch, and determines, among other things, phase error between the branch local oscillators and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：EP0188554B2

公开(公告)日：1995-05-24

申请号：EP85903622.0

申请日：1985-07-09

Applicant: MOTOROLA, INC.

Inventor： LABEDZ, Gerald, P. ,  BONTA, Jeffery, D. ,  SCHAEFFER, Dennis, R. ,  TELL, Daniel, F. ,  LEV, Valy

IPC: H04Q7/22 ,  H04B7/26

CPC classification number: H04W36/0055 ,  H04W28/06

Abstract: A data message transmission system for a cellular radiotelephone system provides protection against data loss caused by multipath fade and subscriber unit handoff. Data from data terminal equipment (801) to be transmitted is converted by a system data processor (805) and radio signalling interface (807) into a format compatible with radio transmission prior to transmission by a transceiver (809). The data is reconverted to its original format following reception. Handoff is accomplished by halting the data transmission prior to handoff and resuming data transmission after handoff. Call supervision occurs via busy-idle bit coding performed in radio signalling interface (807).

公开(公告)号：WO1998007207A3

公开(公告)日：1998-02-19

申请号：PCT/US1997011314

申请日：1997-07-01

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LABEDZ, Gerald, P. ,  LOVE, Robert, T.

IPC: H04B07/005

公开(公告)号：WO1993011627A1

公开(公告)日：1993-06-10

申请号：PCT/US1992010347

申请日：1992-12-01

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BRUCKERT, Eugene, J. ,  LABEDZ, Gerald, P.

IPC: H04M11/00

CPC classification number: H04W72/085 ,  H04W16/32 ,  H04W36/18 ,  H04W36/30 ,  H04W72/0406

Abstract: A communication system dynamically assigns channels to a subscriber unit so as to, inter alia, mitigate the effects of co-channel interference in the system. The communication system has a plurality of base-stations (111, 112, 115, 118) receiving the transmission of a subscriber unit (120, 100, 121) desiring service. Upon receipt of the subscriber unit's transmission, each base-station determines a signal quality value, which it then reports to a system controller (210). The system controller determines the best signal quality value reported and assigns a channel to the base-station which reported the best signal quality value. The chosen base-station transmits to the subscriber unit on an assigned channel to establish communication. The assigned channel transmitted by the chosen base-station need not be associated with the channel the subscriber transmits on. In fact, either channel may be any one of the channels allocated for use by the communication system.

公开(公告)号：WO1992022155A1

公开(公告)日：1992-12-10

申请号：PCT/US1992003552

申请日：1992-04-29

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LING, Fuyun ,  LABEDZ, Gerald, P.

IPC: H04J03/06

CPC classification number: H04L27/2332 ,  H04L25/0212 ,  H04L2027/003 ,  H04L2027/0057 ,  H04L2027/0067 ,  H04L2027/0095

Abstract: The present invention relates to a method and apparatus for providing carrier frequency offset compensation in a time division multiple access (TDMA) communication system (100). In this effort a TDMA receiver (105, 107, 109, 111) is adapted to receive, via a transmission channel, a transmitted signal burst which includes a synchonization signal pattern, a message signal portion and at least one known portion, in a TDMA time slot. Initially, a phase error at that portion of the received signal which corresponds to the known portion of the transmitted signal is determined. Thereafter, various received signal parameters are adjusted in order to eliminate the phase error and thereby compensate for any carrier frequency offsets.

公开(公告)号：WO1986000775A1

公开(公告)日：1986-01-30

申请号：PCT/US1985001302

申请日：1985-07-09

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LABEDZ, Gerald, P. ,  BONTA, Jeffery, D. ,  SCHAEFFER, Dennis, R. ,  TELL, Daniel, F. ,  LEV, Valy

IPC: H04Q07/04

CPC classification number: H04W36/0055 ,  H04W28/06

Abstract: A data message transmission system for a cellular radiotelephone system provides protection against data loss caused by multipath fade and subscriber unit handoff. Data from data terminal equipment (801) to be transmitted is converted by a system data processor (805) and radio signalling interface (807) into a format compatible with radio transmission prior to transmission by a transceiver (809). The data is reconverted to its original format following reception. Handoff is accomplished by halting the data transmission prior to handoff and resuming data transmission after handoff. Call supervision occurs via busy-idle bit coding performed in radio signalling interface (807).

Abstract translation: 用于蜂窝无线电话系统的数据消息传输系统提供防止由多径衰落和用户单元切换引起的数据丢失的保护。 要发送的数据终端设备（801）的数据由系统数据处理器（805）和无线电信令接口（807）转换为在由收发机（809）发送之前与无线电传输兼容的格式。 接收后，数据将重新转换为原始格式。 切换通过在切换之前停止数据传输并在切换之后恢复数据传输来实现。 通过在无线电信令接口（807）中执行的忙闲空闲位编码进行呼叫监控。

公开(公告)号：WO2007133911A3

公开(公告)日：2007-11-22

申请号：PCT/US2007/067453

申请日：2007-04-26

Applicant: MOTOROLA, INC. ,  LABEDZ, Gerald, P.

Inventor： LABEDZ, Gerald, P.

IPC: H04Q7/20

Abstract: Various embodiments are described to address the need for providing wireless backhaul that may reduce operator startup costs while avoiding some of the drawbacks present in the prior art approaches. Generally expressed, the wireless network equipment (WNE) (121) of a collector cell provides access to a backhaul network (151) to one or more neighboring cells (122) via in-band wireless signaling. Given the frequency bands used by the collector cell WNE for communication with remote units, one portion of each band used for user traffic while another portion of each band is used for backhaul traffic. Having backhaul and user traffic share the assigned frequency bands can eliminate the need to license additional bands for wireless backhaul. Moreover, utilizing a portion of the existing, in-band orthogonal channels may be more spectrally efficient than using a separate radio in the same band.

公开(公告)号：WO1992011708A1

公开(公告)日：1992-07-09

申请号：PCT/US1991009479

申请日：1991-12-17

Applicant: MOTOROLA, INC.

Inventor： MOTOROLA, INC. ,  LABEDZ, Gerald, P. ,  KOTZIN, Michael, D. ,  SCHULER, Joseph, J. ,  ZIOLKO, Eric, F.

IPC: H04B07/005

CPC classification number: H04L25/03299 ,  H04L25/0218 ,  H04L25/0228

Abstract: An equalization system for equalizing a corrupted signal is disclosed. The equalization system includes a complex matched filter (400) and a maximum likelihood sequence estimator (MLSE) (405) for removing the effects of phase shift, amplitude variations, intersymbol interference, etc. resulting from multi-pathing and noise contributed by the receiver front end. The system estimates a correlation signal C(t) (505) and synchronizes C(t) (505) to maximize its energy as seen on the taps of the complex matched filter (400). Taps having amplitude coefficients below a predetermined threshold are set to zero to produce a modified CIR estimate. The modified CIR estimate which has had the effects of noise virtually eliminated, is then used to construct the complex matched filter (400) and is also used as input to the MLSE (405) to produce a better equalized data signal.

公开(公告)号：EP1121819B1

公开(公告)日：2007-05-23

申请号：EP99970544.5

申请日：1999-09-21

Applicant: MOTOROLA INC.

Inventor： LABEDZ, Gerald, P.

IPC: H04Q7/20 ,  H04B7/005 ,  H04Q7/36

CPC classification number: H04W52/223 ,  H04W16/18 ,  H04W52/282 ,  H04W52/283 ,  H04W52/288 ,  H04W52/322

Abstract: The present invention provides a method of adjusting channel powers during operation of a wireless communication system (300). A relatively few pieces of operating data (304, 305, 306) are obtained from the wireless communication system (300) and simulation techniques (302) are used to identify potential system performance problems (322). A revised set of channel powers are formulated (310) to correct (316) the potential system performance problems. The performance improvement of the revised set of channel powers is verified (318) using simulation techniques (314), and then the revised set of channel powers is implemented (318) in the wireless communication system (300).