公开(公告)号：US08902726B1

公开(公告)日：2014-12-02

申请号：US13727331

申请日：2012-12-26

Applicant: Marvell International Ltd.

Inventor： Qing Zhao ,  Leilei Song ,  Chuxiang Li

IPC: H04J11/00 ,  H04W56/00

CPC classification number: H04W56/001 ,  H04L27/2613 ,  H04L27/2656

Abstract: Frame synchronization techniques are described. In an implementation, a method implemented by a device includes using an objective function to form a list of values for a plurality of time trials, the time trials taken from a scan of a wireless signal having a plurality of channels. A single one of the values is selected for each of the plurality of channels to detect a preamble of a frame in the wireless signal. If the preamble is not detected as a result of the selecting, at least one additional value is chosen from the list for a respective channel to detect the preamble of the frame in the wireless signal.

Abstract translation: 描述帧同步技术。 在实现中，由设备实现的方法包括使用目标函数来形成用于多个时间试验的值的列表，从具有多个信道的无线信号的扫描获取的时间试验。 为多个信道中的每一个选择值中的单个值以检测无线信号中的帧的前导码。 如果作为选择的结果没有检测到前同步码，则从列表中选择至少一个附加值以用于相应的信道以检测无线信号中的帧的前导码。

公开(公告)号：US08831148B1

公开(公告)日：2014-09-09

申请号：US13947752

申请日：2013-07-22

Applicant: Marvell International Ltd.

Inventor： Jungwon Lee ,  Qing Zhao ,  Hui-Ling Lou

IPC: H04L27/08

CPC classification number: H04L27/08 ,  H03G3/3052 ,  H03G3/3078 ,  H04L27/2626

Abstract: A system including a variable gain amplifier, an automatic gain control module, and a channel estimation module. The variable gain amplifier is configured to amplify an input signal in accordance with a gain. The input signal includes a plurality of orthogonal frequency domain multiplexing symbols. Each of the plurality of orthogonal frequency domain multiplexing symbols is preceded by a respective cyclic prefix. The automatic gain control module is configured to adjust, based on a signal strength of the input signal, the gain of the variable gain amplifier during the respective cyclic prefix preceding each of the plurality of orthogonal frequency domain multiplexing symbols. The channel estimation module is configured to generate a channel estimate for each of the plurality of orthogonal frequency domain multiplexing symbols, and to update the channel estimate in response to the gain of the variable gain amplifier being adjusted.

Abstract translation: 一种包括可变增益放大器，自动增益控制模块和信道估计模块的系统。 可变增益放大器被配置为根据增益来放大输入信号。 输入信号包括多个正交频域复用符号。 多个正交频域复用符号中的每一个前面都有相应的循环前缀。 所述自动增益控制模块被配置为基于所述输入信号的信号强度，在所述多个正交频域复用符号中的每一个之前的相应循环前缀期间调整所述可变增益放大器的增益。 信道估计模块被配置为针对多个正交频域复用符号中的每一个生成信道估计，并且响应于被调整的可变增益放大器的增益来更新信道估计。