公开(公告)号：US20080299931A1

公开(公告)日：2008-12-04

申请号：US12096982

申请日：2006-12-08

Applicant: Jun Yang ,  Dagnachew Birru ,  Seyed-Alireza Seyedi-Esfahani ,  Charles Razzell

Inventor： Jun Yang ,  Dagnachew Birru ,  Seyed-Alireza Seyedi-Esfahani ,  Charles Razzell

IPC: H04B7/08

CPC classification number: H04B7/0814 ,  H04B1/713 ,  H04L1/0606 ,  H04L1/0631 ,  H04L1/0668 ,  H04L27/2647

Abstract: The present invention provides a system (300-400), apparatus (300-400), and method for an energy-based antenna selection technique in which the antenna that observes the largest SNR averaged over all carriers per sub-band (405) is selected for space-time coded MB-OFDM systems. Due to the frequency-selective nature of the system, different sub-band may have different channel gaining effect from the multi-path channels. We can perform energy-based antenna selection per sub-band, and the simulation results show that the proposed technique works not only for MB-OFDM UWB channels with shadowing, but also for the same channel without shadowing.

Abstract translation: 本发明提供一种用于基于能量的天线选择技术的系统（300-400），装置（300-400）及其方法，其中观察每个子带（405）在所有载波上平均的最大SNR的天线是 选择用于空时编码的MB-OFDM系统。 由于系统的频率选择性，不同的子带可能具有来自多路径信道的不同信道增益效应。 我们可以对每个子带进行基于能量的天线选择，仿真结果表明，该技术不仅可以用于具有阴影的MB-OFDM UWB信道，而且对于没有阴影的相同信道也是有效的。

公开(公告)号：US20070202911A1

公开(公告)日：2007-08-30

申请号：US10569205

申请日：2004-08-28

Applicant: Olaf Hirsch ,  Charles Razzell ,  Yifeng Zhang

Inventor： Olaf Hirsch ,  Charles Razzell ,  Yifeng Zhang

IPC: H04B7/00

CPC classification number: H04W52/287 ,  H04W52/0225 ,  Y02D70/142

Abstract: An incoming signal, such as a data frame, is detected in a RF stage (302) of a wireless station (300). This allows the baseband stage (304) to be in a low power or off state until an incoming signal is detected. By detecting an incoming signal in the RF stage (302), the amount of power consumed by the baseband stage (304) is advantageously reduced. When an incoming signal is detected, the RF stage (302) generates an activation signal that is sent to the baseband stage (304) to activate the baseband stage (304). Once activated, the baseband stage (304) receives the signal and performs signal processing and data recovery operations.

Abstract translation: 在无线站（300）的RF级（302）中检测诸如数据帧的输入信号。 这允许基带级（304）处于低功率或关断状态，直到检测到输入信号。 通过检测RF级（302）中的输入信号，有利地减少了基带级（304）消耗的功率量。 当检测到输入信号时，RF级（302）产生发送到基带级（304）以激活基带级（304）的激活信号。 一旦被激活，基带级（304）接收信号并执行信号处理和数据恢复操作。