公开(公告)号：AU1968101A

公开(公告)日：2001-04-30

申请号：AU1968101

申请日：2000-10-17

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H

IPC: H04B1/707 ,  H04B7/26

公开(公告)号：AU2002327014A1

公开(公告)日：2003-04-07

申请号：AU2002327014

申请日：2002-09-19

Applicant: ATHEROS COMM INC

Inventor： TEHRANI ARDAVAN MALEKI ,  BAAS BEVAN M ,  MENG TERESA H ,  MCFARLAND WILLIAM ,  GILBERT JEFFREY M

IPC: H03H17/02 ,  H04L5/06 ,  H04L7/00 ,  H04L25/03 ,  H04L27/00 ,  H04L27/26

Abstract: A circular filtering system that prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that the output of the filter, for any given symbol is formed by filtering only samples of that input symbol. Each symbol being filtered independent of other symbols hence eliminating inter-symbol interference caused by filtering. Where symbols are tolerant to a fixed phase shift for each symbol, the circular filtering system can be simplified by reducing the size of the buffer and introducing a multiplexer.

公开(公告)号：AU2443501A

公开(公告)日：2001-07-09

申请号：AU2443501

申请日：2000-12-19

Applicant: ATHEROS COMM INC

Inventor： MCFARLAND WILLIAM J ,  MENG TERESA H

IPC: H04L5/02 ,  H04L27/26

Abstract: A communication system such as an OFDM or DMT system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes are allowed to use a small number of sub-channels while more complicated nodes use the remainder, and preferably functionality is provided to ensure that adjacent sub-channels are reliably spaced apart in frequency so that they do not bleed over into one another; to ensure that signals from all nodes arrive at the base station with well-aligned symbol transitions; and to ensure that signals from the various nodes arrive at the base station with similar power levels.

公开(公告)号：CA2386885A1

公开(公告)日：2001-04-19

申请号：CA2386885

申请日：2000-10-11

Applicant: ATHEROS COMM INC

Inventor： SU DAVID ,  MENG TERESA H ,  ZARGARI MASOUD

IPC: H04L7/00 ,  H03J7/04 ,  H04L27/00 ,  H04L27/233 ,  H04J3/06

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the samplin g frequency during transmission are provided, including both digital and analo g implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to t he original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

公开(公告)号：WO0128150A3

公开(公告)日：2001-09-27

申请号：PCT/US0041164

申请日：2000-10-11

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H ,  SU DAVID ,  SARGARI MASOUD

IPC: H04L7/00 ,  H03J7/04 ,  H04L27/00 ,  H04L27/233 ,  H04J3/06

CPC classification number: H04L27/148 ,  H03J7/04 ,  H04B1/38 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0022

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

Abstract translation: 本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间的频率偏移的影响。 在本发明中，提供了用于在传输期间校正载波频率和采样频率的方法，包括这种方法的数字和模拟实现。 接收器确定发射器和接收器之间的相对频率偏移，并且当接收器将其数据传输到返回路径中的原始发射器时使用该信息来校正该偏移，使得原始发射器接收到的信号处于采样中并且 载波频率锁定与原始发射机的本地频率参考。

公开(公告)号：WO0148969A3

公开(公告)日：2002-01-10

申请号：PCT/US0034651

申请日：2000-12-19

Applicant: ATHEROS COMM INC

Inventor： MCFARLAND WILLIAM J ,  MENG TERESA H

IPC: H04L5/02 ,  H04L27/26

CPC classification number: H04L27/2662 ,  H04L5/023 ,  H04L27/2657

Abstract: A multi-user OFDM or DMT communication system has nodes which are allowed to transmit continuously on one or just a few of the system's frequency sub-channels, while the other nodes avoid putting any signal into those sub-channels. Simple low data rate nodes are allowed to use a small number of sub-channels while more complicated nodes use the remainder, and preferably functionality is provided to ensure that adjacent sub-channels are reliably spaced apart in frequency so that they do not bleed over into one another; to ensure that signals from all nodes arrive at the base station with well-aligned symbol transitions (symbol synchronization); and to ensure that signals from the various nodes arrive at the base station with similar power levels (power control). Frequency assignment strategies at a base station range from one fixed sub-channel per node to a hopped group of sub-channels per node.

Abstract translation: 多用户OFDM或DMT通信系统具有允许在系统的一个或仅几个频率子信道上连续发送的节点，而其他节点避免将任何信号放入这些子信道。 允许简单的低数据速率节点使用少量子信道，而更复杂的节点使用余数，并且优选地提供功能以确保相邻子信道在频率上可靠地间隔开，使得它们不会渗入 另一个; 以确保来自所有节点的信号到达具有良好对齐的符号转换（符号同步）的基站; 并确保来自各个节点的信号以类似的功率级别（功率控制）到达基站。 基站的频率分配策略的范围从每个节点的固定子信道到每个节点的跳跃的子信道组。

公开(公告)号：CA2380758C

公开(公告)日：2010-09-14

申请号：CA2380758

申请日：2000-07-28

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H

IPC: H04L1/00 ,  H04L29/08 ,  H04B7/005 ,  H04B7/15 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56

Abstract: The present invention provides an apparatus and method for optimizing power in order to increase capacity. Rather than having any terminal device limited to a specific maximum data rate, instead the terminal device data rate is limited by the power being used, such that the data rate can vary according to the distance that the terminal device is from the intended receiver.

公开(公告)号：CA2386885C

公开(公告)日：2013-12-03

申请号：CA2386885

申请日：2000-10-11

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H ,  SU DAVID ,  ZARGARI MASOUD

IPC: H04L7/00 ,  H04L27/233 ,  H03J7/04 ,  H04J3/06 ,  H04L27/00

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

公开(公告)号：DE60040914D1

公开(公告)日：2009-01-08

申请号：DE60040914

申请日：2000-07-28

Applicant: ATHEROS COMM INC

Inventor： MENG TERESA H

IPC: H04L1/00 ,  H04L29/08 ,  H04B7/005 ,  H04B7/15 ,  H04B7/26 ,  H04L12/28 ,  H04L12/56

Abstract: The present invention provides an apparatus and method for optimizing power in order to increase capacity. Rather than having any terminal device limited to a specific maximum data rate, instead the terminal device data rate is limited by the power being used, such that the data rate can vary according to the distance that the terminal device is from the intended receiver.

公开(公告)号：WO03028327A2

公开(公告)日：2003-04-03

申请号：PCT/US0230016

申请日：2002-09-19

Applicant: ATHEROS COMM INC

Inventor： BAAS BEVAN M ,  GILBERT JEFFREY M ,  MCFARLAND WILLIAM ,  MENG TERESA H ,  TEHRANI ARDAVAN MALEKI

IPC: H03H17/02 ,  H04L5/06 ,  H04L7/00 ,  H04L25/03 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L25/03012 ,  H03H17/02 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414

Abstract: A circular filtering system which prevents the problem of inter-symbol interference. The circular filtering system utilizes a buffer memory to store samples of a given symbol and provide only these samples to a linear filter such that the output of the filter, for any given symbol is formed by filtering only samples of that input symbol. Each symbol is filtered independent of other symbols hence eliminating inter-symbol interference caused by filtering. Where symbols are tolerant to a fixed phase shift for each symbol, the circular filtering system can be simplified by reducing the size of the buffer and introducing a multiplexer.

Abstract translation: 一种圆形滤波系统，可防止符号间干扰问题。 圆形过滤系统利用缓冲存储器来存储给定符号的样本，并且仅将这些样本提供给线性滤波器，使得对于任何给定符号的滤波器的输出仅通过对该输入符号的样本进行滤波来形成。 每个符号被独立于其他符号进行滤波，从而消除由滤波引起的符号间干扰。 在符号对每个符号进行固定相移的情况下，可以通过减小缓冲器的大小并引入多路复用器来简化圆形滤波系统。