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公开(公告)号：WO2004043028A8
公开(公告)日：2005-05-19
申请号：PCT/SE0202033
申请日：2002-11-07
Applicant: ERICSSON TELEFON AB L M , LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , SJOEBERG STEN , KRONQUIST GOERAN
Inventor： LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , SJOEBERG STEN , KRONQUIST GOERAN
IPC: H04L27/26
CPC classification number: H04L27/262
Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is beingchosen for transmission.
Abstract translation: 通过OFDM调制信号来传送数字数据帧的方法，该OFDM调制信号包括承载子信道的第一多个有效负载和第二多个导频携带子信道，由此连续的有效载荷数据帧与给定的导频配置相关联并发送。 在传输有效载荷数据帧之前，针对PAPR评估多个导频配置中的每一个，由此与最低PAPR值相关联的导频配置被选择用于传输。
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公开(公告)号：AU1861102A
公开(公告)日：2002-06-11
申请号：AU1861102
申请日：2001-11-29
Applicant: ERICSSON TELEFON AB L M
Inventor： DAVIDSSON STEFAN , WALTHER ROGER , WENGER FABIAN , PAULI MATHIAS , SCHRAMM PETER , WACHSMANN UDO
Abstract: A radio receiver system ( 30 ) comprises a radio receiver ( 41 ), a receiver sample clock ( 60 ), which is used for sampling a modulated base-band signal; and a timing correction unit ( 100 ). The timing correction unit ( 100 ) performs, in the frequency domain, a timing drift compensation between a transmitter sample clock ( 66 ) and the receiver sample clock ( 60 ). In one example context of implementation, the plural modulated radio frequency carriers have been modulated using Orthogonal Frequency Division Multiplexing (OFDM).
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3.发明专利
公开(公告)号：ES2317956T3
公开(公告)日：2009-05-01
申请号：ES01999073
申请日：2001-11-29
Applicant: ERICSSON TELEFON AB L M
Inventor： DAVIDSSON STEFAN , WALTHER ROGER , WENGER FABIAN , PAULI MATHIAS , SCHRAMM PETER , WACHSMANN UDO
Abstract: Un aparato de receptor de radio que comprende: un receptor de radio (41) que recibe diferentes portadoras de frecuencias de radio moduladas y produce desde allí una señal de banda de base modulada, habiendo sido las diferentes portadoras de frecuencias de radio moduladas transmitidas por un radio transmisor (38) que opera de acuerdo con un reloj de muestra de transmisor (66) en el que la frecuencia de radio y el reloj de muestra se derivan de la misma fuente; un reloj de muestra de receptor (60) que se usa para muestrear la señal de banda de base modulada; una unidad de estimación de desviación de frecuencia (102, 150) que proporciona una estimación de la desviación de la frecuencia, t0; una unidad de corrección de temporización (100), que lleva a cabo en el dominio de la frecuencia una compensación de la desviación de la temporización entre el reloj de muestra del transmisor y el reloj de muestra del receptor. caracterizado porque el aparato comprende también un controlador en modo durmiente (200) adaptado de manera que obtiene (11-1) una estimación de la desviación de la frecuencia, foff; deriva (11-2) una desviación del reloj de muestra correspondiente a la estimación, t0, siendo una desviación entre el reloj de muestra del receptor y el reloj de muestra del transmisor de la siguiente relación:** ver fórmula** donde f off es una estimación de la desviación de la frecuencia absoluta en Hz, y f c es una frecuencia de portadora en Hz; determina (11-3) la desviación de la temporización, Toff, durante un periodo de sueño de una duración dada Tsleep, de acuerdo con** ver fórmula** determina (11-4) el tamaño de la mitad de la anchura de una ventana de búsqueda asumiendo un error máximo del reloj de muestra del receptor de acuerdo con Twind/2 = Tsleep u tores, asumiendo un error máximo, tores, del reloj de muestra, t0; contando desde el tiempo t=0 cuando entra el modo de sueño y determinando que el receptor debe dormir (11-5) hasta el tiempo t expresado por** ver fórmula** y busca (11-6) el inicio de la trama hasta el tiempo expresado por ** ver fórmula**
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公开(公告)号：DE60137141D1
公开(公告)日：2009-02-05
申请号：DE60137141
申请日：2001-11-29
Applicant: ERICSSON TELEFON AB L M
Inventor： DAVIDSSON STEFAN , WALTHER ROGER , WENGER FABIAN , PAULI MATHIAS , SCHRAMM PETER , WACHSMANN UDO
Abstract: A radio receiver system ( 30 ) comprises a radio receiver ( 41 ), a receiver sample clock ( 60 ), which is used for sampling a modulated base-band signal; and a timing correction unit ( 100 ). The timing correction unit ( 100 ) performs, in the frequency domain, a timing drift compensation between a transmitter sample clock ( 66 ) and the receiver sample clock ( 60 ). In one example context of implementation, the plural modulated radio frequency carriers have been modulated using Orthogonal Frequency Division Multiplexing (OFDM).
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公开(公告)号：BR0215922A
公开(公告)日：2005-08-09
申请号：BR0215922
申请日：2002-11-07
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , KRONQUIST GOERAN , SJOEBERG STEN
IPC: H04L27/26
Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is being chosen for transmission.
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Patent Agency Ranking
公开(公告)号：AT429116T
公开(公告)日：2009-05-15
申请号：AT02783933
申请日：2002-11-07
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , KRONQUIST GOERAN , SJOEBERG STEN
IPC: H04L27/26
Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is being chosen for transmission.
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公开(公告)号：AU2002347734A1
公开(公告)日：2004-06-07
申请号：AU2002347734
申请日：2002-11-07
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , KRONQUIST GORAN
IPC: H04L27/26
Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is being chosen for transmission.
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公开(公告)号：AT521205T
公开(公告)日：2011-09-15
申请号：AT05702681
申请日：2005-01-14
Applicant: ERICSSON TELEFON AB L M
Inventor： RYDNELL GUNNAR , LINDSKOG JAN , WALTHER ROGER
IPC: H04W36/14
Abstract: System (PAA-BSS) comprising a plurality of access points (AP), defining a pre authentication area (PAA), the system communicating a list of frequencies relating to the access points of the pre-authentication area (PAA) and information as to the relative position of the access points to the a mobile station seeking pre-authentication before the system. Method of preparing a mobile station for handover between access points, wherein the mobile station associating (11, 21, 31) with a first access point in a predetermined group of access points (PAA-BSS) defining a pre-authentication area (PAA), the mobile station authenticating (12, 22, 32) itself before at least one prevalent access point of the group (PAA-BSS), upon being accepted for authentication before the prevalent, the mobile station receiving a response comprising a list of frequencies (14, 24, 34) pertaining to access points of the group (PAA-BSS).
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公开(公告)号：DE60232026D1
公开(公告)日：2009-05-28
申请号：DE60232026
申请日：2002-11-07
Applicant: ERICSSON TELEFON AB L M
Inventor： LINDSKOG JAN , RYDNELL GUNNAR , WALTHER ROGER , KRONQUIST GOERAN , SJOEBERG STEN
IPC: H04L27/26
Abstract: Method of communicating frames of digital data by OFDM modulated signals comprising a first plurality of payload carrying sub-channels and a second plurality of pilot carrying sub-channels, whereby consecutive frames of payload data is are associated with a given pilot configuration and transmitted. Prior to the transmission of a frame of payload data, each of the plurality of pilot configurations are evaluated with regard to PAPR, whereby the pilot configuration being associated with the lowest PAPR value is being chosen for transmission.
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公开(公告)号：AT418823T
公开(公告)日：2009-01-15
申请号：AT01999073
申请日：2001-11-29
Applicant: ERICSSON TELEFON AB L M
Inventor： DAVIDSSON STEFAN , WALTHER ROGER , WENGER FABIAN , PAULI MATHIAS , SCHRAMM PETER , WACHSMANN UDO
Abstract: A radio receiver system ( 30 ) comprises a radio receiver ( 41 ), a receiver sample clock ( 60 ), which is used for sampling a modulated base-band signal; and a timing correction unit ( 100 ). The timing correction unit ( 100 ) performs, in the frequency domain, a timing drift compensation between a transmitter sample clock ( 66 ) and the receiver sample clock ( 60 ). In one example context of implementation, the plural modulated radio frequency carriers have been modulated using Orthogonal Frequency Division Multiplexing (OFDM).
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