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公开(公告)号：DE69828589D1
公开(公告)日：2005-02-17
申请号：DE69828589
申请日：1998-03-11
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K , YANG RUI , CERDA RAMON
IPC: H04L27/22 , H04B1/707 , H04B1/7085 , H04B1/7117 , H04B7/216 , H04L27/00 , H04L27/233
Abstract: A receiver for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.
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公开(公告)号：DE69904039T2
公开(公告)日：2003-09-11
申请号：DE69904039
申请日：1999-01-27
Applicant: INTERDIGITAL TECH CORP
Inventor： OZLUTURK M , MESECHER K , JACQUES M
IPC: H04L27/02 , H04B1/707 , H04B1/7073 , H04B1/7075 , H04B1/7085 , H04B1/7093 , H04B1/7115
Abstract: The present invention relates to a receiver for receiving at least one of a plurality of channels in a communication system, the receiver comprising: an adaptive matched filter (79) for receiving communication signals and producing a filtered signal by using a weighting signal; a rake receiver (101) for receiving communication signals and a pseudo-noise signal (931) generated for a selected channel and producing a filter weighting signal; means for defining the filter weighting signal with a correction signal (119), said correction signal to produce the weighting signal used by said adaptive matched filter; a channel despreader (85) for said selected channel coupled to said adaptive matched filter output for despreading said filtered signal using the pseudo-noise signal generated for said selected channel to produce a despread channel signal (95) of said selected channel; a pilot channel despreader (87) for a pilot channel coupled to said adaptive matched filter output for despreading said filtered signal using a pseudo-noise signal generated for said pilot channel to produce a despread pilot signal (135) of said pilot channel; a hard decision processor (121) in association with a complex conjugate processor (123) for receiving the despread channel signal of said selected channel and producing said correction signal; and means (157) for producing a phase correction signal (183) utilizing at least said despread pilot signal, said phase correction signal being applied to produce phase-corrected channel signals.
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公开(公告)号：DE69904039D1
公开(公告)日：2003-01-02
申请号：DE69904039
申请日：1999-01-27
Applicant: INTERDIGITAL TECH CORP
Inventor： OZLUTURK M , MESECHER K , JACQUES M
IPC: H04L27/02 , H04B1/707 , H04B1/7073 , H04B1/7075 , H04B1/7085 , H04B1/7093 , H04B1/7115
Abstract: The present invention relates to a receiver for receiving at least one of a plurality of channels in a communication system, the receiver comprising: an adaptive matched filter (79) for receiving communication signals and producing a filtered signal by using a weighting signal; a rake receiver (101) for receiving communication signals and a pseudo-noise signal (931) generated for a selected channel and producing a filter weighting signal; means for defining the filter weighting signal with a correction signal (119), said correction signal to produce the weighting signal used by said adaptive matched filter; a channel despreader (85) for said selected channel coupled to said adaptive matched filter output for despreading said filtered signal using the pseudo-noise signal generated for said selected channel to produce a despread channel signal (95) of said selected channel; a pilot channel despreader (87) for a pilot channel coupled to said adaptive matched filter output for despreading said filtered signal using a pseudo-noise signal generated for said pilot channel to produce a despread pilot signal (135) of said pilot channel; a hard decision processor (121) in association with a complex conjugate processor (123) for receiving the despread channel signal of said selected channel and producing said correction signal; and means (157) for producing a phase correction signal (183) utilizing at least said despread pilot signal, said phase correction signal being applied to produce phase-corrected channel signals.
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公开(公告)号：DE69828589T2
公开(公告)日：2006-03-16
申请号：DE69828589
申请日：1998-03-11
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K , YANG RUI , CERDA RAMON
IPC: H04L27/22 , H04L27/233 , H04B1/707 , H04B1/7085 , H04B1/7117 , H04B7/216 , H04L27/00
Abstract: A receiver for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.
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公开(公告)号：DE69922054T2
公开(公告)日：2005-10-27
申请号：DE69922054
申请日：1999-09-03
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K
Abstract: The present inventation provides a base station comprising: a plurality of antennas, each of the antennas separated by a known distance; means for transmitting a first spread spectrum signal having a first code; means for receiving, using the plurality of antennas, a second spread spectrum signal having a second code, the second spread spectrum signal time synchronized with the first spread spectrum signal; means for making a distance determination based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station's transmitted first spread spectrum signal; means for comparing a phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas; and means for determining an angle of the received second spread spectrum signal using the known distance between the antennas and the phase difference; and means for determining a location of a source of the second spread spectrum signal using the determined angle and the distance determination.
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Patent Agency Ranking
公开(公告)号：DE1210775T1
公开(公告)日：2002-11-14
申请号：DE00963356
申请日：2000-09-11
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K , REZNIK ALEXANDER , GRIECO DONALD , CHEUNG GARY
IPC: H04B1/712 , H04B7/06 , H04B7/08 , H04B7/216 , H04B7/26 , H04J13/00 , H04M1/725 , H04Q7/38 , H04B1/707
Abstract: A receiving device comprising circuitry configured to receive a signal including pilot bits transmitted by a plurality of antennas; wherein the received signal includes data for a single user that was combined with different sequences producing a plurality of combined data sequences; wherein antenna-specific weights for the plurality of antennas are applied to each of the combined data sequences and the antenna specific weights are applied to pilot bits added with the combined data sequences; wherein the received signal includes the pilot bits for each of the plurality of antennas; and wherein the pilot bits for each antenna have a different sequence for that antenna; the circuitry is further configured to derive preferred weights for the received signal based on the pilot bits for each antenna; the circuitry is further configured to recover data for the single user from each of the combined data sequences; and the circuitry is further configured to combine data from the recovered data for the single user from each of the different sequences.
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公开(公告)号：DE60012944T2
公开(公告)日：2005-08-11
申请号：DE60012944
申请日：2000-09-11
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K , REZNIK ALEXANDER , GRIECO DONALD , CHEUNG GARY
IPC: H04B1/712 , H04B7/06 , H04B7/08 , H04B7/216 , H04B7/26 , H04J13/00 , H04M1/725 , H04Q7/38 , H04B1/707
Abstract: A receiving device comprising circuitry configured to receive a signal including pilot bits transmitted by a plurality of antennas; wherein the received signal includes data for a single user that was combined with different sequences producing a plurality of combined data sequences; wherein antenna-specific weights for the plurality of antennas are applied to each of the combined data sequences and the antenna specific weights are applied to pilot bits added with the combined data sequences; wherein the received signal includes the pilot bits for each of the plurality of antennas; and wherein the pilot bits for each antenna have a different sequence for that antenna; the circuitry is further configured to derive preferred weights for the received signal based on the pilot bits for each antenna; the circuitry is further configured to recover data for the single user from each of the combined data sequences; and the circuitry is further configured to combine data from the recovered data for the single user from each of the different sequences.
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公开(公告)号：DE69922054D1
公开(公告)日：2004-12-23
申请号：DE69922054
申请日：1999-09-03
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K
Abstract: The present inventation provides a base station comprising: a plurality of antennas, each of the antennas separated by a known distance; means for transmitting a first spread spectrum signal having a first code; means for receiving, using the plurality of antennas, a second spread spectrum signal having a second code, the second spread spectrum signal time synchronized with the first spread spectrum signal; means for making a distance determination based on in part a timing difference between the second code of the received second spread spectrum signal and the first code of the base station's transmitted first spread spectrum signal; means for comparing a phase difference of a carrier signal of the second spread spectrum signal as received by each of the plurality of antennas; and means for determining an angle of the received second spread spectrum signal using the known distance between the antennas and the phase difference; and means for determining a location of a source of the second spread spectrum signal using the determined angle and the distance determination.
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公开(公告)号：DE60012944D1
公开(公告)日：2004-09-16
申请号：DE60012944
申请日：2000-09-11
Applicant: INTERDIGITAL TECH CORP
Inventor： MESECHER K , REZNIK ALEXANDER , GRIECO DONALD , CHEUNG GARY
IPC: H04B1/712 , H04B7/06 , H04B7/08 , H04B7/216 , H04B7/26 , H04J13/00 , H04M1/725 , H04Q7/38 , H04B1/707
Abstract: A receiving device comprising circuitry configured to receive a signal including pilot bits transmitted by a plurality of antennas; wherein the received signal includes data for a single user that was combined with different sequences producing a plurality of combined data sequences; wherein antenna-specific weights for the plurality of antennas are applied to each of the combined data sequences and the antenna specific weights are applied to pilot bits added with the combined data sequences; wherein the received signal includes the pilot bits for each of the plurality of antennas; and wherein the pilot bits for each antenna have a different sequence for that antenna; the circuitry is further configured to derive preferred weights for the received signal based on the pilot bits for each antenna; the circuitry is further configured to recover data for the single user from each of the combined data sequences; and the circuitry is further configured to combine data from the recovered data for the single user from each of the different sequences.
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公开(公告)号：DE970571T1
公开(公告)日：2000-04-06
申请号：DE98923728
申请日：1998-05-26
Applicant: INTERDIGITAL TECH CORP
Inventor： LOMP R , KAZERKEVICH LEONID , POLAN S , MESECHER K
Abstract: A communication station includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the communication station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.
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