公开(公告)号：US10541796B2

公开(公告)日：2020-01-21

申请号：US16001648

申请日：2018-06-06

Applicant: Marvell World Trade Ltd.

Inventor： Hua Mu ,  Hongyuan Zhang ,  Rui Cao ,  Xiayu Zheng ,  Sergey Timofeev

IPC: H04L5/00 ,  H04L27/26 ,  H04W84/12

Abstract: A communication device generates: i) a physical layer (PHY) preamble of a PHY protocol data unit (PPDU), ii) a first portion of a PHY data payload of the PPDU, and iii) a second portion of the PHY data payload. The PHY preamble includes a first training field, and one or more second training fields. The first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of first orthogonal frequency division multiplexing (OFDM) symbols. Each of multiple first OFDM symbols has a first duration. The communication device generates a PHY midamble of the PPDU to be included between the first and second portions of the PHY data payload. The PHY midamble includes one or more third training fields, each including a respective second OFDM symbol having a second duration shorter than the first duration.

公开(公告)号：US09270311B2

公开(公告)日：2016-02-23

申请号：US14560827

申请日：2014-12-04

Applicant: Marvell World Trade Ltd.

Inventor： Srinivas Pinagapany ,  Sergey Timofeev ,  Atul Salhotra

IPC: H04B1/10 ,  H04B1/12 ,  H04B17/00 ,  H04B1/40

CPC classification number: H04B1/123 ,  H03H7/0161 ,  H03H11/1291 ,  H03H2210/025 ,  H03H2210/046 ,  H04B1/40 ,  H04B17/0085 ,  H04B17/21

Abstract: Devices and methods capable of addressing filter responses are disclosed. For example, a method for compensating a first low-pass filter and a second low-pass filter is disclosed. The method includes injecting a reference tone fR and a cutoff tone fC into the first low-pass filter, and measuring respective filter responses of the reference tone fR and the cutoff tone fC while changing capacitor codes that control a cutoff frequency of the first low-pass filter until a first capacitor code ICODE is determined that most accurately causes the first low-pass filter to utilize a desired cutoff frequency f0, performing a similar operation for the second low-pass filter until a second capacitor code QCODE is determined, and calibrating for mismatch between the first low-pass filter and the second low-pass filter.

Abstract translation: 公开了能够寻址滤波器响应的装置和方法。 例如，公开了一种用于补偿第一低通滤波器和第二低通滤波器的方法。 该方法包括将参考音fR和截止频率fC注入到第一低通滤波器中，并且在改变控制第一低通滤波器的截止频率的电容器代码的同时测量参考音fR和截止频率fC的各个滤波器响应， 通过滤波器直到确定最准确地使第一低通滤波器利用期望的截止频率f0的第一电容器代码ICODE，对第二低通滤波器执行类似的操作，直到确定第二电容器代码QCODE，并校准 用于第一低通滤波器和第二低通滤波器之间的失配。