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公开(公告)号：DE60123272T2
公开(公告)日：2007-04-05
申请号：DE60123272
申请日：2001-11-29
Applicant: QUALCOMM INC
Inventor： RAZOUMOV LEONID , LUNDBY A , HOLTZMAN M , TIEDEMANN G , ODENWALDER P
IPC: H04L1/00 , H04B1/7103 , H04B7/005 , H04L1/20 , H04W52/36
Abstract: A method for coherent estimation of the traffic-to-pilot energy ratio is presented. A received preamble is decoded (20), and then re-encoded (22). The received preamble is then multiplied by the re-encoded preamble (23). The results are summmed (24), squared (26), and then divided by a pilot energy value (28). In another method, a message (41) carrying energy information can be inserted between a subpacket preamble (40) and a subpacket (42).
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公开(公告)号：DE69734652D1
公开(公告)日：2005-12-22
申请号：DE69734652
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , JOU YU-CHEUN , ODENWALDER P
Abstract: The present invention is a method and apparatus for transmitting a high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements to receive the additional information carried on the at least one additional channel.
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公开(公告)号：DE60019137D1
公开(公告)日：2005-05-04
申请号：DE60019137
申请日：2000-08-11
Applicant: QUALCOMM INC
Inventor： SARKAR SANDIP , TIEDEMANN G , ODENWALDER P
IPC: H04B7/005 , H04B7/26 , H04W24/00 , H04W36/00 , H04W36/14 , H04W52/08 , H04W52/12 , H04W52/22 , H04W52/24 , H04W52/28 , H04W52/40 , H04W52/48 , H04W72/06 , H04Q7/38
Abstract: The structure of a time-multiplexed physical channel is used to time inter-frequency or inter-system search excursions. A mobile station that receives an instruction to perform a search excursion prepares for the search excursion by detecting the first radio frame of a message frame. Transport format combination indicator bits are extracted from the first radio frame and stored. After the search excursion is performed, the mobile station recalls the stored indicator bits and uses the indicator bits to decode other radio frames of the message frame.
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公开(公告)号：DE69837044D1
公开(公告)日：2007-03-22
申请号：DE69837044
申请日：1998-09-08
Applicant: QUALCOMM INC
Inventor： LUNDBY A , ODENWALDER P , TIEDEMANN G
IPC: H04J11/00 , H04B1/707 , H04B7/26 , H04J13/00 , H04J13/10 , H04W16/00 , H04W16/24 , H04W16/32 , H04W48/08 , H04W48/16
Abstract: A method and apparatus for providing orthogonal spot beams (14a, 14b), sectors (16a, 16b), and picocells (18). The transmissions can be made orthogonal by using orthogonal auxiliary pilots and different Walsh traffic channels in adjacent areas. In accordance with the IS-95 standard, the pilot signal is covered with the 64-chip Walsh sequence zero. The 64-chip all zeros Walsh sequence can be designated as P and the 64-chip all one sequence can be designated as M. In the present invention, additional pilot signals can be provided by concatenating 64-chip all zeros P and all ones M sequences. Thus, for two pilot signals, pilot Walsh sequences of PP and PM can be used. For four pilot signals, pilot Walsh sequences of PPPP, PMPM, PPMM, and PMMP can be used. The present invention can be extended such that any required number of pilot Walsh sequences can be generated by substituting each bit in an K-bit Walsh sequence with the 64-chip all zeros P or all ones M sequence depending on the value of that bit.
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公开(公告)号：DE69835447D1
公开(公告)日：2006-09-14
申请号：DE69835447
申请日：1998-11-12
Applicant: QUALCOMM INC
Inventor： CHEN TAO , ODENWALDER P , TIEDEMANN G , WILLENEGGER SERGE
Abstract: An efficient retransmission of data using symbol accumulation wherein the packet received in error is retransmitted at a lower energy-per-bit level concurrently in the same frame with the new packet. The destination device receives the data transmission and retransmission, demodulate the signal, and separates the received data into the new and retransmitted packet. The destination device then accumulates the energy of the retransmitted packet with the energy already accumulated for the packet received in error and decodes the accumulated packet. The accumulation of the additional energy provided by the subsequent retransmissions improves the probability of a correct decoding. The throughput rate can be improved since the packet received in error is retransmitted concurrently with the transmission of the new data packet. The capacity is maximized since the retransmission of the packet received in error is at a lower energy level than that of the new packet.
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Patent Agency Ranking
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公开(公告)号：DE69533665T2
公开(公告)日：2006-02-16
申请号：DE69533665
申请日：1995-07-05
Applicant: QUALCOMM INC
Inventor： TIEDEMANN G , GILHOUSEN S , ODENWALDER P , ZEHAVI EPHRAIM , LEVIN A , WHEATLEY E
Abstract: A method and apparatus for controlling transmission power in a variable rate communication system is disclosed. The method disclosed provides for a closed loop power control method. A first remote station controls the transmission power of a second remote station by transmitting a rate dependent power control signal to the second remote communication station. Since only the second communication knows its transmission rate a priori, it must determine its course of action in accordance with both the received power control signal and the knowledge of its transmission rate.
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公开(公告)号：DE60019137T2
公开(公告)日：2006-02-09
申请号：DE60019137
申请日：2000-08-11
Applicant: QUALCOMM INC
Inventor： SARKAR SANDIP , TIEDEMANN G , ODENWALDER P
IPC: H04B7/005 , H04B7/26 , H04W24/00 , H04W36/00 , H04W36/14 , H04W52/08 , H04W52/12 , H04W52/22 , H04W52/24 , H04W52/28 , H04W52/40 , H04W52/48 , H04W72/06
Abstract: The structure of a time-multiplexed physical channel is used to time inter-frequency or inter-system search excursions. A mobile station that receives an instruction to perform a search excursion prepares for the search excursion by detecting the first radio frame of a message frame. Transport format combination indicator bits are extracted from the first radio frame and stored. After the search excursion is performed, the mobile station recalls the stored indicator bits and uses the indicator bits to decode other radio frames of the message frame.
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公开(公告)号：DE69729296D1
公开(公告)日：2004-07-01
申请号：DE69729296
申请日：1997-05-28
Applicant: QUALCOMM INC
Inventor： ODENWALDER P , JOU YU-CHEN , TIEDEMANN G
Abstract: A method for demodulating a received signal comprising complex multiplying (202,204) the received signal by a complex pseudonoise code to produce a complex pseudonoise despread signal (XI,XQ); filtering (214) the complex pseudonoise despread signal to provide a complex filtered pilot signal; multiplying (210) the complex pseudo-noise despread signal by a first demodulation code to provide a first complex demodulated data signal; and phase rotating and scaling (216,218) the first complex demodulated clara signal in accordance with the complex-filtered pilot signal to provide a first soft decision data.
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公开(公告)号：DE60123272D1
公开(公告)日：2006-11-02
申请号：DE60123272
申请日：2001-11-29
Applicant: QUALCOMM INC
Inventor： RAZOUMOV LEONID , LUNDBY A , HOLTZMAN M , TIEDEMANN G , ODENWALDER P
IPC: H04L1/00 , H04B1/7103 , H04B7/005 , H04L1/20 , H04W52/36
Abstract: A method for coherent estimation of the traffic-to-pilot energy ratio is presented. A received preamble is decoded (20), and then re-encoded (22). The received preamble is then multiplied by the re-encoded preamble (23). The results are summmed (24), squared (26), and then divided by a pilot energy value (28). In another method, a message (41) carrying energy information can be inserted between a subpacket preamble (40) and a subpacket (42).
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