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公开(公告)号：WO02058330A3
公开(公告)日：2004-02-05
申请号：PCT/IB0200132
申请日：2002-01-14
Applicant: IBM , FURRER SIMEON , MAIWALD DIETRICH , SCHOTT WOLFGANG
Inventor： FURRER SIMEON , MAIWALD DIETRICH , SCHOTT WOLFGANG
CPC classification number: H04W88/02 , H04W52/0229 , H04W84/10 , H04W84/18 , Y02D70/00 , Y02D70/144
Abstract: The invention provides a baseband system (8) for a short-range radio communication system. It is conform to the Bluetooth baseband specification and is well-suited for an efficient hardware implementation, providing a low-power, small-sized, and low-cost radio subsystem design. The baseband system comprises a transceiver unit (20) and a buffer unit (50), whereby the system has an efficient gate count and a reduced power consumption. The transceiver unit design is based on a pipelined signal processing with distributed data path flow control. The transceiver unit (20) processes outgoing and incoming packets, and comprises a plurality of signal processing units connected in sequence, whereby each signal processing unit is clocked by a common clock signal. A mode line is connected to each signal processing unit for switching each signal processing unit between a transmit mode and a receive mode. A control line to which each signal processing unit is connected communicates flow control information either in the transmit mode to one or more of the preceding signal processing units or in the receive mode to one or more of the following signal processing units. The buffer unit (50) comprises a buffer system that applies a flexible memory organization concept, which leads to an efficient implementation of buffers or storage elements in terms of gate count and power consumption, and offers the flexibility to dynamically allocate memory for variable length user packets.
Abstract translation: 本发明提供了一种用于短距离无线电通信系统的基带系统（8）。 它符合蓝牙基带规范，非常适合高效的硬件实现，提供低功耗，小尺寸和低成本的无线电子系统设计。 基带系统包括收发器单元（20）和缓冲单元（50），由此该系统具有有效的门数和降低的功耗。 收发器单元设计基于具有分布式数据路径流量控制的流水线信号处理。 收发器单元（20）处理输出和输入分组，并且包括顺序连接的多个信号处理单元，由此每个信号处理单元由公共时钟信号计时。 模式线连接到每个信号处理单元，用于在发送模式和接收模式之间切换每个信号处理单元。 每个信号处理单元所连接的控制线将发送模式中的流量控制信息传送到前述信号处理单元中的一个或多个或接收模式中的一个或多个信号处理单元。 缓冲单元（50）包括缓冲系统，其应用灵活的存储器组织概念，其导致在门计数和功耗方面有效地实现缓冲器或存储元件，并且提供了灵活性以动态地为可变长度用户分配存储器 数据包。
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公开(公告)号：DE60007487T2
公开(公告)日：2004-09-16
申请号：DE60007487
申请日：2000-06-03
Applicant: IBM
Inventor： GFELLER FRITZ , SCHOTT WOLFGANG
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公开(公告)号：DE602004006537T2
公开(公告)日：2008-01-31
申请号：DE602004006537
申请日：2004-11-19
Applicant: IBM
Inventor： FURRER SIMEON , JELITTO JENS , SCHOTT WOLFGANG , WEISS BEAT
Abstract: The invention relates to a method for modulating sub-carrier symbols to an intermediate-frequency OFDM signal having even and odd samples, including following steps: transforming a number N of the sub-carrier symbols to pre-processed sub-carrier symbols; performing a complex inverse discrete Fourier transformation (IDFT) on the pre-processed sub-carrier symbols to generate complex output symbols; and transforming the complex output symbols to the intermediate-frequency OFDM signal, wherein the sub-carrier symbols are transformed so that the even and odd samples of the intermediate-frequency OFDM signal are given by real and imaginary parts of the complex output symbols.
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公开(公告)号：DE69509804T2
公开(公告)日：1999-12-09
申请号：DE69509804
申请日：1995-06-14
Applicant: IBM
Inventor： CHEVILLAT PIERRE , CIDECIYAN ROY , RUPF MARCEL , SCHOTT WOLFGANG
Abstract: A system and method for the wireless transmission of data packets in a code division multiple access communication system wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS).A request is sent from a transmitting station (MSy) to the corresponding receiving station (BS) of the communication system indicating the destination address to which data packet(s) are to be routed.Then, registering the transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it.Next, the transmitting station (MSy) is attached to the code division multiple access channel (PRCH) used for the transmission of data packets.Then, listening to the downlink of the code division multiple access channel (PRCH) used for the transmission of data packets until the corresponding receiving station (BS) broadcasts that it will be "idle" such that a random access to the code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame.Next, the transnmission power of the transmitting station (MSy) is ramped up during the next frame until a certain power level is reached.The data packet(s) and the virtual connection identifier (VCIy) are transmitted over the uplink of the code division multiple access channel (PRCH) used for the transmission of data packets to the receiving station (BS).The data packet(s) are routed to the destination address.Access to the code division multiple access channel (PRCH) used for the transmission of data packets is controller by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).
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公开(公告)号：DE69509804D1
公开(公告)日：1999-06-24
申请号：DE69509804
申请日：1995-06-14
Applicant: IBM
Inventor： CHEVILLAT PIERRE , CIDECIYAN ROY , RUPF MARCEL , SCHOTT WOLFGANG
Abstract: A system and method for the wireless transmission of data packets in a code division multiple access communication system wherein one of the code division multiple access channels (PRCH) is used in a time-shared fashion for the transmission of the data packets from several transmitting stations (MSy, MSz) to a receiving station (BS).A request is sent from a transmitting station (MSy) to the corresponding receiving station (BS) of the communication system indicating the destination address to which data packet(s) are to be routed.Then, registering the transmitting station (MSy) and assigning an unique virtual connection identifier (VCIy) to it.Next, the transmitting station (MSy) is attached to the code division multiple access channel (PRCH) used for the transmission of data packets.Then, listening to the downlink of the code division multiple access channel (PRCH) used for the transmission of data packets until the corresponding receiving station (BS) broadcasts that it will be "idle" such that a random access to the code division multiple access channel (PRCH) used for the transmission of data packets is allowed in the next frame.Next, the transnmission power of the transmitting station (MSy) is ramped up during the next frame until a certain power level is reached.The data packet(s) and the virtual connection identifier (VCIy) are transmitted over the uplink of the code division multiple access channel (PRCH) used for the transmission of data packets to the receiving station (BS).The data packet(s) are routed to the destination address.Access to the code division multiple access channel (PRCH) used for the transmission of data packets is controller by a multiple access protocol based on carrier sensing and collision detection (CSMA/CD).
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Patent Agency Ranking
公开(公告)号：CA2059922A1
公开(公告)日：1992-09-28
申请号：CA2059922
申请日：1992-01-23
Applicant: IBM
Inventor： DOLIVO FRANCOIS , SCHOTT WOLFGANG
Abstract: SZ 9-90-004 This invention covers a method for fast and reliably detecting the reception of preambles in recording and communication systems using partial-response signaling. Each preamble, transmitted preceding user data, consists of a timing sequence followed by a known sequence of bits marking its end. The invention provides a method for fast and reliably recognizing that synchronization has been achieved and the timing sequence is being received, and detecting the end of the preamble. A hardware implementation based on the inventive method is also described.
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公开(公告)号：BRPI0206547B1
公开(公告)日：2015-11-10
申请号：BR0206547
申请日：2002-01-14
Applicant: IBM
Inventor： MAIWALD DIETRICH , FURRER SIMEON , SCHOTT WOLFGANG
IPC: H04L12/28
Abstract: "sistema de banda base digital"'. a invenção proporciona um sistema de banda base para um sistema de radiocomunicação de curto alcance. ele está de acordo com a especificação de banda base bluetooth e é bem adequado para uma implementação eficiente de hardware, proporcionando um projeto de subsistema de rádio de baixa potência, pequeno porte e baixo custo. o sistema de banda base compreende uma unidade transceptora e uma unidade de armazenamento temporária, pelo que o sistema tem uma contagem de portas eficiente e um consumo de energia reduzido. o projeto da unidade transceptora está baseado em um processamento de sinal por encadeamento com controle de fluxo de rotas de dados distribuídos. a unidade transceptora processa pacotes de saída e de chegada e compreende uma pluralidade de unidades processadoras de sinais conectadas em seqüência, pelo que cada unidade processadora de sinais é cronometrada por um sinal de relógio comum. uma linha de modo é conectada a cada unidade processadora de sinais para comutar cada unidade processadora de sinais entre um modo de transmissão e um modo de recepção. uma linha de controle à qual cada unidade processadora de sinais é conectada comunica informação de controle de fluxo no modo de transmissão para uma ou mais das unidades processadoras de sinais precedentes ou no modo de recepção para uma ou mais das unidades processadoras de sinais seguintes. a unidade de armazenamento temporário compreende um sistema de armazenamento temporário que aplica um conceito de organização de memória flexível, que leva a uma implementação eficiente de elementos de armazenamentos temporários ou de armazenamento em termos de contagem de portas e consumo de energia e oferece a flexibilidade para alocar memória dinamicamente para pacotes de usuário de comprimento variável. o sistema de armazenamento temporário para armazenar dados da primeira unidade de processamento e da segunda unidade de processamento compreende uma pluralidade de elementos de armazenamento, pelo que cada elemento de armazenamento tem uma primeira unidade de armazenamento e uma segunda unidade de armazenamento. um subsistema de comutação é proporcionado para comutar cada elemento de armazenamento entre os primeiro e segundo modos. no primeiro modo, cada primeira unidade de armazenamento é endereçável pela primeira unidade de processamento e cada segunda unidade de armazenamento é endereçável pela segunda unidade de processamento. no segundo modo, cada segunda unidade de armazenamento é endereçável pela primeira unidade de processamento e cada primeira unidade de armazenamento é endereçável pela segunda unidade de processamento.
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公开(公告)号：DE60226454D1
公开(公告)日：2008-06-19
申请号：DE60226454
申请日：2002-01-14
Applicant: IBM
Inventor： FURRER SIMEON , MAIWALD DIETRICH , SCHOTT WOLFGANG
IPC: H04L12/28
Abstract: Communication device for processing outgoing and incoming packets. The device includes a plurality of signal processing units connected in sequence, each signal processing unit being clocked by a common clock signal. The device further includes a mode line connected to each signal processing unit for switching each signal processing unit between a transmit mode and a receive mode. The device further includes a control line to which each signal processing unit is connected. The control line communicating flow control information either in the transmit mode to at least one of the preceding signal processing units or in the receive mode to at least one of the following signal processing units.
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公开(公告)号：AT257299T
公开(公告)日：2004-01-15
申请号：AT00111782
申请日：2000-06-03
Applicant: IBM
Inventor： GFELLER FRITZ , SCHOTT WOLFGANG
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公开(公告)号：BR0206547A
公开(公告)日：2004-03-02
申请号：BR0206547
申请日：2002-01-14
Applicant: IBM
Inventor： FURRER SIMEON , MAIWALD DIETRICH , SCHOTT WOLFGANG
IPC: H04L12/28
Abstract: Communication device for processing outgoing and incoming packets. The device includes a plurality of signal processing units connected in sequence, each signal processing unit being clocked by a common clock signal. The device further includes a mode line connected to each signal processing unit for switching each signal processing unit between a transmit mode and a receive mode. The device further includes a control line to which each signal processing unit is connected. The control line communicating flow control information either in the transmit mode to at least one of the preceding signal processing units or in the receive mode to at least one of the following signal processing units.
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