公开(公告)号：WO2008133751A3

公开(公告)日：2009-04-30

申请号：PCT/US2007087792

申请日：2007-12-17

Applicant: QUALCOMM INC ,  GLAZKO SERGUEI A ,  BECKMAN JAMES EDWARD ,  PATEL SHIMMAN

Inventor： GLAZKO SERGUEI A ,  BECKMAN JAMES EDWARD ,  PATEL SHIMMAN

IPC: H04B1/10 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04B1/1036 ,  H04K3/228

Abstract: Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.

Abstract translation: 描述了用于检测和抑制干扰的技术。 接收机可以执行FFT后干扰检测和预FFT干扰抑制。 接收机可以变换输入信号以获得频域信号，并且可以基于频域信号来检测输入信号中的干扰。 接收机可以基于频域信号来确定多个载波的功率，并且可以基于这些载波的功率的峰值来检测干扰。 接收机可以过滤输入信号（例如，使用陷波滤波器）来抑制检测到的干扰。 或者或另外，接收机可以执行FFT后干扰检测和FFT后干扰抑制。 接收机可以基于该载波的数据功率和信道功率来确定每个载波上是否存在干扰信号。 接收机可以利用检测到的干扰来修改（例如，零或降低）载波上的频域信号。

公开(公告)号：WO2008045842A1

公开(公告)日：2008-04-17

申请号：PCT/US2007/080730

申请日：2007-10-08

Applicant: QUALCOMM Incorporated ,  BECKMAN, James Edward ,  CHAN, Joseph ,  ABRISHAMKAR, Farrokh ,  BREHLER, Matthias ,  LEVIANT, Michael

Inventor： BECKMAN, James Edward ,  CHAN, Joseph ,  ABRISHAMKAR, Farrokh ,  BREHLER, Matthias ,  LEVIANT, Michael

IPC: H04L25/02

CPC classification number: H04L25/023 ,  H04L5/0048 ,  H04L25/0244 ,  H04L25/025

Abstract: Techniques for deriving a channel estimate using a scattered pilot and a continual pilot are described. The scattered pilot is sent on different sets of carriers in different symbol periods. The continual pilot is sent in each symbol period on irregularly spaced carriers. The scattered pilot is used to identify the indices of channel taps of interest, e.g., L strongest channel taps. The continual pilot is used to determine the complex gains of these L channel taps. A receiver derives a channel impulse response estimate based on received pilot symbols for the scattered pilot, identifies the L strongest channel taps, and determines the indices of these L strongest channel taps. The receiver forms a Fourier sub-matrix based on the L tap indices and determines the gains of the L channel taps based on received pilot symbols for the continual pilot and the Fourier sub-matrix.

Abstract translation: 描述了使用分散导频和连续导频来导出信道估计的技术。 分散导频在不同符号周期的不同载波集上发送。 连续飞行员在每个符号周期内发送不规则的航空母舰。 分散导频用于识别所关心的信道抽头的索引，例如L个最强的信道抽头。 连续导频用于确定这些L信道分接头的复杂增益。 接收机基于接收到的导频符号导出用于散射导频的信道脉冲响应估计，识别L个最强信道抽头，并且确定这些L个最强信道抽头的索引。 接收器基于L抽头索引形成傅里叶子矩阵，并且基于用于连续导频和傅里叶子矩阵的接收导频符号确定L个信道抽头的增益。

公开(公告)号：WO2008133751A2

公开(公告)日：2008-11-06

申请号：PCT/US2007/087792

申请日：2007-12-17

Applicant: QUALCOMM INCORPORATED ,  GLAZKO, Serguei, A. ,  BECKMAN, James, Edward ,  PATEL, Shimman

Inventor： GLAZKO, Serguei, A. ,  BECKMAN, James, Edward ,  PATEL, Shimman

CPC classification number: H04L27/2647 ,  H04B1/1036 ,  H04K3/228

Abstract: Techniques for detecting and suppressing jammers are described. A receiver may perform post-FFT jammer detection and pre-FFT jammer suppression. The receiver may transform an input signal to obtain a frequency-domain signal and may detect for jammers in the input signal based on the frequency-domain signal. The receiver may determine powers of a plurality of carriers based on the frequency-domain signal and may detect for jammers based on peaks in the powers of these carriers. The receiver may filter the input signal (e.g., with a notch filter) to suppress the detected jammers. Alternatively or additionally, the receiver may perform post-FFT jammer detection and post-FFT jammer suppression. The receiver may determine whether jammer is present on each carrier based on data power and channel power for that carrier. The receiver may modify (e.g., zero out or reduce) the frequency-domain signal on carriers with detected jammers.

Abstract translation: 描述了用于检测和抑制干扰的技术。 接收机可以执行FFT后干扰检测和预FFT干扰抑制。 接收机可以变换输入信号以获得频域信号，并且可以基于频域信号来检测输入信号中的干扰。 接收机可以基于频域信号来确定多个载波的功率，并且可以基于这些载波的功率的峰值来检测干扰。 接收机可以过滤输入信号（例如，使用陷波滤波器）来抑制所检测到的干扰。 或者或另外，接收机可以执行FFT后干扰检测和FFT后干扰抑制。 接收机可以基于该载波的数据功率和信道功率来确定每个载波上是否存在干扰信号。 接收机可以利用检测到的干扰来修改（例如，零或降低）载波上的频域信号。