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公开(公告)号：CA2097586C
公开(公告)日：1995-10-17
申请号：CA2097586
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 receiver (350) 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 (300). All Nyquist filtering occurs in the transmitters (300), and none in the receiver (350).
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公开(公告)号：AU663109B2
公开(公告)日：1995-09-28
申请号：AU2467792
申请日：1992-08-14
Applicant: MOTOROLA INC
Inventor： JASPER STEVEN C , BIRCHLER MARK A , SOLOMON JAMES D
IPC: H04L1/02 , H04B1/707 , H04B3/10 , H04J1/00 , H04L27/26 , H04L27/34 , H04L5/12 , H03K7/00 , H03M9/00
Abstract: A quad 16 QAM transmission and reception 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. Depending upon the embodiment, each 16 QAM pulse can include a time domain pilot reference, or an estimated pilot reference 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：AT87777T
公开(公告)日：1993-04-15
申请号：AT86901242
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：CA1281080C
公开(公告)日：1991-03-05
申请号：CA500739
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: DIGITAL ZERO-IF SELECTIVITY SECTION A Digital Zero-IF Selectivity Section (DZISS) is disclosed. The DZISS of the present invention teaches a topology that facilitates realization in both transmitters and receivers. In the preferred low-speed embodiment, the digital filter are comprised of cascaded filter sections employing decimation co reduce the data rate. In the preferred high-speed embodiment, the digital filters are more sophisticated as at least the first filter section is decomposed to enable high-speed operation. Decimation 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 lowpass filters are time multiplexed effectuating a cost and space savings.
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公开(公告)号：CA1260120A
公开(公告)日：1989-09-26
申请号：CA517172
申请日：1986-08-29
Applicant: MOTOROLA INC
Inventor： JANC ROBERT V , JASPER STEVEN C
Abstract: A digital receiver (100) for GPS C/A-code signals is described. The GPS receiver (100) of the present invention provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels. The GPS receiver (100) of the present invention includes an analog front-end (104) for selecting and frequency translating the received GPS signal. The GPS receiver (100) further includes a highspeed digital signal processor (110) for recovering the despread data of the GPS signal. The baseband signal is further processed by a genertal purpose digital signal processor (112) for signal search, tracking, and data recovery operations, and a microprocessor (114) provides overall receiver control, and interface with the operator of the GPS receiver (100).
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Patent Agency Ranking
公开(公告)号：AU573966B2
公开(公告)日：1988-06-23
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：WO2006113119B1
公开(公告)日：2007-06-14
申请号：PCT/US2006012408
申请日：2006-03-31
Applicant: MOTOROLA INC , FRANK COLIN D , CORKE ROBERT J , JASPER STEVEN C , MAKHLOUF ISAM R
Inventor： FRANK COLIN D , CORKE ROBERT J , JASPER STEVEN C , MAKHLOUF ISAM R
CPC classification number: H04L25/0236 , H04L27/2647
Abstract: A receiver (300) configured for: a) receiving (410) a first OFDM symbol and generating a plurality of demodulated symbols (306) for the first OFDM symbol: b) generating (420) decoder output code symbols (326) corresponding to a subset of the plurality of demodulated symbols; c) determining (430) that a set of (he decoder output code symbols (326) make up a set of reference symbols corresponding to at least a portion of the subset of the plurality of demodulated symbols (306); d) generating (440) the set of reference symbols; e) generating (450) a set of channel estimates (362) 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.
Abstract translation: 一种接收机（300），被配置用于：a）接收（410）第一OFDM符号并为所述第一OFDM符号生成多个解调符号（306）：b）产生（420）对应于 多个解调符号的子集; c）确定（430）一组（解码器输出码符号（326））构成与多个解调符号（306）的子集的至少一部分相对应的一组参考符号; d）产生（440 ）参考符号集合; e）基于参考符号集合和多个解调符号的子集的至少一部分来生成（450）一组信道估计（362），以用于解码当前OFDM符号; 以及f）重复步骤b，直到已经生成了对应于第一OFDM符号的每个解调符号的信道估计。
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公开(公告)号：WO2006107911A3
公开(公告)日：2007-04-19
申请号：PCT/US2006012410
申请日：2006-03-31
Applicant: MOTOROLA INC , JASPER STEVEN C , CORKE ROBERT J , FRANK COLIN D , MAKHLOUF ISAM R
Inventor： JASPER STEVEN C , CORKE ROBERT J , FRANK COLIN D , MAKHLOUF ISAM R
CPC classification number: H04L25/0224 , H04L27/2647
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; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; subdividing (230) the set of raw channel estimates into a plurality of subsets; assigning and applying (240) a corresponding reference symbol magnitude quantization scheme to each subset; determining (250) a set of filter coefficients that is based on the quantization schemes applied to the subsets of raw channel estimates; and combining (260) the set of raw channel estimates with the set of filter coefficients to generate a channel estimate.
Abstract translation: 一种包括接收机（100）的系统，其被配置为：选择（210）一组解调器输出样本和相应的一组参考符号; 基于所述解调器输出样本集合和相应的参考符号集合来生成（220）一组原始信道估计; 将所述原始信道估计集合（230）细分为多个子集; 向每个子集分配和应用（240）对应的参考符号量化量化方案; 确定（250）基于应用于原始信道估计的子集的量化方案的一组滤波器系数; 以及将所述原始信道估计集合与所述滤波器系数集合（260）以生成信道估计。
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公开(公告)号：WO2006113119A2
公开(公告)日：2006-10-26
申请号：PCT/US2006012408
申请日：2006-03-31
Applicant: MOTOROLA INC , FRANK COLIN D , CORKE ROBERT J , JASPER STEVEN C , MAKHLOUF ISAM R
Inventor： FRANK COLIN D , CORKE ROBERT J , JASPER STEVEN C , MAKHLOUF ISAM R
IPC: H04K1/10
CPC classification number: H04L25/0236 , H04L27/2647
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.
Abstract translation: 一种接收机，被配置用于：a）接收（410）第一OFDM符号并产生用于所述第一OFDM符号的多个解调符号; b）产生（420）对应于所述多个解调符号的子集的解码器输出码符号; c）确定（430）一组解码器输出码符号组成对应于多个解调符号的子集的至少一部分的一组参考符号; d）产生（440）所述参考符号集合; e）基于参考符号集合和所述多个解调符号的子集的至少一部分来生成（450）一组信道估计，用于解码当前OFDM符号; 以及f）重复步骤b-e，直到已经产生对应于第一OFDM符号的每个解调符号的信道估计为止。
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40.发明申请
公开(公告)号：WO2006107911B1
公开(公告)日：2007-07-26
申请号：PCT/US2006012410
申请日：2006-03-31
Applicant: MOTOROLA INC , JASPER STEVEN C , CORKE ROBERT J , FRANK COLIN D , MAKHLOUF ISAM R
Inventor： JASPER STEVEN C , CORKE ROBERT J , FRANK COLIN D , MAKHLOUF ISAM R
CPC classification number: H04L25/0224 , H04L27/2647
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; generating (220) a set of raw channel estimates based on the set of demodulator output samples and the corresponding set of reference symbols; subdividing (230) the set of raw channel estimates into a plurality of subsets; assigning and applying (240) a corresponding reference symbol magnitude quantization scheme to each subset; determining (250) a set of filter coefficients that is based on the quantization schemes applied to the subsets of raw channel estimates; and combining (260) the set of raw channel estimates with the set of filter coefficients to generate a channel estimate.
Abstract translation: 一种包括接收机（100）的系统，所述接收机（100）被配置用于：选择（210）一组解调器输出采样和对应的一组参考符号; 基于所述一组解调器输出采样和所述对应的参考符号集合生成（220）一组原始信道估计; 将所述一组原始信道估计值细分（230）为多个子集; 将对应的参考符号量值方案分配并应用（240）到每个子集; 基于应用于原始信道估计的子集的量化方案来确定（250）一组滤波器系数; 以及将该组原始信道估计与该组滤波器系数组合（260）以生成信道估计。
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