公开(公告)号：US20040022307A1

公开(公告)日：2004-02-05

申请号：US10208045

申请日：2002-07-31

Applicant: Broadcom Corporation

Inventor： Mark Dale ,  Dorothy Lin ,  Jen-chieh Chien ,  Alan Gin ,  Rocco J. Brescia JR. ,  Alan Kwentus ,  David L. Hartman ,  Joyce Wang

IPC: H04N007/20 ,  H04N007/173 ,  H04B001/38 ,  H04L005/16

CPC classification number: H04L1/0057 ,  H04L1/004 ,  H04L1/0065 ,  H04L1/0066 ,  H04L25/03343 ,  H04L27/34 ,  H04L2025/0342

Abstract: Methods and systems for modifying DOCSIS-based transmission paths for communication in higher frequency and/or wireless environments, such as wireless terrestrial communication systems and satellite communication systems. An inner turbo-code is combined with a DOCSIS based Reed-Solomon (nullRSnull) forward error correction (nullFECnull) coding scheme, to produce a concatenated turbo-RS code (other FEC codes can be utilized). In phase and quadrature phase (nullI-Qnull) processing is utilized to enable relatively low cost up-converter implementations. The I-Q processing is preferably performed at baseband, essentially pre-compensating for analog variations in the transmit path. Power amplifier on/off control capable of controlling on/off RF power control of remote transmitters is modulated on a transmit cable to reduce the need for a separate cable.

Abstract translation: 用于修改在诸如无线地面通信系统和卫星通信系统的较高频率和/或无线环境中进行通信的基于DOCSIS的传输路径的方法和系统。 内部turbo码与基于DOCSIS的Reed-Solomon（“RS”）前向纠错（“FEC”）编码方案组合，以产生级联的turbo-RS码（可以利用其他FEC码）。 使用同相和正交相位（“I-Q”）处理来实现相对低成本的上变频器实现。 优选地，在基带处执行I-Q处理，基本上对发送路径中的模拟变化进行预补偿。 功率放大器开/关控制能够控制远程发射机的开/关射频功率控制在发射电缆上进行调制，以减少对单独电缆的需要。

公开(公告)号：US20040006771A1

公开(公告)日：2004-01-08

申请号：US10186718

申请日：2002-07-02

Applicant: Broadcom Corporation

Inventor： Mark R. Dale ,  David L. Hartman ,  Alan Gin ,  Jen-Chieh Chien ,  Anders Hebsgaard ,  Rocco J. Brescia JR. ,  Cho-Hsin J. Wang ,  Alan Y. Kwentus ,  Dorothy D. Lin

IPC: H04N007/173 ,  H04N007/20

CPC classification number: H04N21/6193 ,  H04N7/17309 ,  H04N21/2385 ,  H04N21/44209 ,  H04N21/6143 ,  H04N21/637

Abstract: A modified ranging request in a broadband communications system. The modified ranging request includes a header, a management message header attached to the header, a management message payload attached to the management message header, and a CRC attached to the management message payload. The management message header enables bandwidth requests to be made by subscriber equipment without contention. The management message header also includes state of health information on the status of a downstream transmission for enabling a central location to determine how to assign subscribers to queues in an adaptive modulation scheme.

Abstract translation: 宽带通信系统中的修改后的测距请求。 修改的测距请求包括头部，附加到头部的管理消息头部，附加到管理消息头部的管理消息有效载荷以及附加到管理消息有效载荷的CRC。 管理消息报头使得用户设备能够进行带宽请求而无需争用。 管理消息报头还包括关于下游传输的状态的健康状况信息，用于使中央位置能够确定如何在自适应调制方案中为队列分配订户。