公开(公告)号：SG111970A1

公开(公告)日：2005-06-29

申请号：SG200206308

申请日：1999-01-27

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH M ,  MESECHER DAVID K ,  JACQUES ALEXANDER 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.

公开(公告)号：AT228278T

公开(公告)日：2002-12-15

申请号：AT99904364

申请日：1999-01-27

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH M ,  MESECHER DAVID K ,  JACQUES ALEXANDER 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.

公开(公告)号：HK1035814A1

公开(公告)日：2001-12-07

申请号：HK01105905

申请日：2001-08-21

Applicant: INTERDIGITAL TECH CORP

Inventor： MESECHER DAVID K ,  OZLUTURK FATIH M ,  JACQUES ALEXANDER M

IPC: H04L27/02 ,  H04B1/707 ,  H04B1/7073 ,  H04B1/7075 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7115 ,  H04B

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.

公开(公告)号：CA2330703A1

公开(公告)日：1999-11-18

申请号：CA2330703

申请日：1999-01-27

Applicant: INTERDIGITAL TECH CORP

Inventor： MESECHER DAVID K ,  JACQUES ALEXANDER M ,  OZLUTURK FATIH M

IPC: H04L27/02 ,  H04B1/707 ,  H04B1/7073 ,  H04B1/7075 ,  H04B1/7085 ,  H04B1/7093 ,  H04B1/7115

Abstract: A digital spread spectrum communication system employing pilot-aided coheren t multipath demodulation effects a substantial reduction in global-pilot and assigned-pilot overheads. The system and method uses a QPSK-modulated data signal whereby the modulated data is removed and the recovered carrier is us ed for channel amplitude and phase estimation. The resulting signal (119) has n o data modulation and is used as a pseudo-pilot signal (119). In conjunction with the pseudo-pilot signal, a multiple-input phase-locked loop (157) is employed further eliminating errors due to carrier-offset by using a plurali ty of pseudo-pilot signals. A pilot signal (135) is required to resolve absolut e phase ambiguity, but at a greatly reduced magnitude.