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公开(公告)号：BR9107239A
公开(公告)日：1994-04-05
申请号：BR9107239
申请日：1991-12-16
Applicant: MOTOROLA INC
Inventor： WILSON ALAN L , CUDAK MARK C , HIBEN BRADLEY M , ZIOLKO ERIC F , JASPER STEVEN C
Abstract: A transceiver compatible with both wide channel constant envelope 4 level FSK FM modulation and narrow channel pi /4 differential QPSK linear modulation allows compatible interaction between modified constant envelope and non-constant envelope transmitters. All Nyquist filtering occurs in the transmitters, and none in the receiver.
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公开(公告)号：GB2266645A
公开(公告)日：1993-11-03
申请号：GB9312028
申请日：1992-08-14
Applicant: MOTOROLA INC
Inventor： JASPER STEVEN C , BIRCHLER MARK A , SOLOMON JAMES D
Abstract: A quad 16 QAM transmission (132-136) and reception (600) methodology wherein a time domain pilot reference is advantageously associated therewith. There may be one or more such pilot references for each packet of multiple 16 QAM pulses (200). Depending upon the embodiment, each 16 QAM pulse can include a time domain pilot reference, or an estimated pilot reference (402 and 301) for that pulse can be determined either by reference to pilot references in other pulses sharing the same packet, or by reference to pilot references for other previously received 16 QAM pulses corresponding to that same pulse.
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公开(公告)号：AU3320993A
公开(公告)日：1993-08-03
申请号：AU3320993
申请日：1992-12-14
Applicant: MOTOROLA INC
Inventor： JASPER STEVEN C , BUTLER JAMES A
Abstract: In a QAM communications system, a novel synchronizing sequence of symbols added to the information channel simplifies acquisition of timing and synchronization by a receiver. Such synchronization vectors provide signals for improved AFC control signal generation.
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公开(公告)号：MX9102718A
公开(公告)日：1992-06-01
申请号：MX9102718
申请日：1991-12-19
Applicant: MOTOROLA INC
Inventor： WILSON ALAN L , CUDAK MARK C , HIBEN BRADLEY M , ZIOLKO ERIC F , JASPER STEVEN C
Abstract: A transceiver compatible with both wide channel constant envelope 4 level FSK FM modulation and narrow channel pi /4 differential QPSK linear modulation allows compatible interaction between modified constant envelope and non-constant envelope transmitters. All Nyquist filtering occurs in the transmitters, and none in the receiver.
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公开(公告)号：CA1292517C
公开(公告)日：1991-11-26
申请号：CA610390
申请日：1989-09-06
Applicant: MOTOROLA INC
Inventor： JOHNSON MARK J , YESTER FRANCIS R JR , JASPER STEVEN C
Abstract: DIGITAL FM SQUELCH DETECTOR A method is disclosed for determining when a frequencymodulated expected information signal resides at a predetermined channel. The method is based on determining a value based on the frequency deviation of the received signal, and then comparing the value with a threshold based on the expected information signal. The method is particularly well-suited for use as a squelch detector in digital FM radios.
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Patent Agency Ranking
公开(公告)号：AU5454786A
公开(公告)日：1986-10-23
申请号：AU5454786
申请日：1986-01-30
Applicant: MOTOROLA INC
Inventor： JASPER STEVEN C , LONGLEY LESTER A , LAMBERT KATHERINE H
IPC: H03D1/00 , H03B27/00 , H03B28/00 , H03C3/40 , H03D1/22 , H03D7/16 , H03H17/02 , H04B1/04 , H04B1/30
Abstract: A digital Zero-IF Selectivity Section (DZISS) (20, 20'). The DZISS of the present invention teaches a topology that facilitates realization in both transmitter (20') and receivers (20). In the preferred low-speed embodiment, the digital filters (32, 32', 33, 33') are comprised of cascaded filter sections (64a-64d) employing decimation (66) to reduce the data rate. In the preferred high-speed embodiment, the digital filters (32, 32', 33, 33') are more sophisticated as at least the first filter section (64') is decomposed to enable high-speed operation. Decimation (66) is also employed on the high-speed embodiment to allow subsequent circuitry to operate at a lower data rate thus consuming less power. In an alternate embodiment, applicable to the low-speed and high-speed preferred embodiments, sections of the digital low pass filters (100A, 100B) are time multiplexed (104) effectuating a cost and space savings.
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公开(公告)号：GB2440094B
公开(公告)日：2009-12-16
申请号：GB0722373
申请日：2006-03-31
Applicant: MOTOROLA INC
Inventor： FRANK COLIN D , CORKE ROBERT J , JASPER STEVEN C , MAKHLOUF ISAM R
Abstract: A receiver configured for: a) receiving (410) a first OFDM symbol and generating a plurality of demodulated symbols for the first OFDM symbol; b) generating (420) decoder output code symbols corresponding to a subset of the plurality of demodulated symbols; c) determining (430) that a set of the decoder output code symbols make up a set of reference symbols corresponding to at least a portion of the subset of the plurality of demodulated symbols; d) generating (440) the set of reference symbols; e) generating (450) a set of channel estimates based on the set of reference symbols and the at least a portion of the subset of the plurality of demodulated symbols, for use in decoding a current OFDM symbol; and f) repeating steps b-e until a channel estimate for each demodulated symbol corresponding to the first OFDM symbol has been generated.
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公开(公告)号：GB2439702A
公开(公告)日：2008-01-02
申请号：GB0721497
申请日：2006-03-31
Applicant: MOTOROLA INC
Inventor： MAKHLOUF ISAM R , JASPER STEVEN C
IPC: H04L25/02
Abstract: A system that includes a receiver (100) that is configured for selecting (210) a set of demodulator output samples and a corresponding set of reference symbols each having a magnitude; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; determining (230) a set of linearly-constrained filter coefficient parameters; and combining (240) the set of raw channel estimates with the set of linearly-constrained filter coefficient parameters to generate a channel estimate.
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公开(公告)号：AU2003291819A8
公开(公告)日：2004-07-29
申请号：AU2003291819
申请日：2003-11-19
Applicant: MOTOROLA INC
Inventor： TURNEY WILLIAM J , JASPER STEVEN C
IPC: H01Q20060101 , H01Q9/16 , H04B1/56 , H04L5/14 , H04Q7/00
Abstract: A wireless communication unit provides ( 10 ) a first signal as received from a first portion ( 11 ) of a single antenna and provides ( 13 ) a second signal as received from a second portion of the antenna, which in a preferred embodiment can comprise a feedline ( 12 ). The two signals contain information that is cross-coupled with respect to one another as a function, at least in part, of the structure of the antenna. A digital processing platform ( 34 ) de-couples ( 17 ) these signals to permit recovery of the original payloads. In one embodiment similar approaches are used to facilitate cross-coupling of signals and transmission of such cross-coupled signals from different portions of a single antenna structure. In another embodiment, both transmission and reception are facilitated by a common platform.
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公开(公告)号：AU2003291819A1
公开(公告)日：2004-07-29
申请号：AU2003291819
申请日：2003-11-19
Applicant: MOTOROLA INC
Inventor： JASPER STEVEN C , TURNEY WILLIAM J
IPC: H01Q20060101 , H01Q9/16 , H04B1/56 , H04L5/14 , H04Q7/00
Abstract: A wireless communication unit provides ( 10 ) a first signal as received from a first portion ( 11 ) of a single antenna and provides ( 13 ) a second signal as received from a second portion of the antenna, which in a preferred embodiment can comprise a feedline ( 12 ). The two signals contain information that is cross-coupled with respect to one another as a function, at least in part, of the structure of the antenna. A digital processing platform ( 34 ) de-couples ( 17 ) these signals to permit recovery of the original payloads. In one embodiment similar approaches are used to facilitate cross-coupling of signals and transmission of such cross-coupled signals from different portions of a single antenna structure. In another embodiment, both transmission and reception are facilitated by a common platform.
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