公开(公告)号：US09769848B2

公开(公告)日：2017-09-19

申请号：US14832811

申请日：2015-08-21

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Amar Prakash Azad ,  Sujit Jos ,  Sandhya Patil ,  Kannan Govindan ,  Kiran Bynam ,  Manoj Choudhary ,  Taeseok Kim ,  Youngsoo Kim

IPC: H04W4/00 ,  H04W74/08 ,  H04W48/10 ,  H04W84/12

CPC classification number: H04W74/0816 ,  H04W48/10 ,  H04W84/12

Abstract: A method and apparatus for a collision-free carrier sense multiple access (CSMA) are provided. The method of a node associated with a beacon enabled carrier sense multiple access (CSMA)-based wireless communication network through an access point (AP) includes receiving a beacon from the AP, the beacon comprising a back-off prime number and a beacon random number, and generating a back-off interval based on the beacon random number, the back-off prime number, a mapped identification (ID) of the node, and a current time slot of a frame of the beacon. The method and apparatus provide a collision-free CSMA scheme for a beacon enabled CSMA-based wireless communication network. In the collision-free CSMA scheme, uniformly distributed back-off intervals may be generated in a distributed fashion at each node for a CSMA-based wireless communication network. The back-off intervals may be correlated among the nodes even though the nodes do not communicate with each other.

公开(公告)号：US09692588B2

公开(公告)日：2017-06-27

申请号：US15204195

申请日：2016-07-07

Applicant: Samsung Electronics Co., Ltd.

Inventor： Kiran Bynam ,  Sujit Jos ,  PS Chandrashekhar Thejaswi ,  ChangSoon Park ,  Jinesh P. Nair ,  Young-Jun Hong ,  Youngsoo Kim ,  Manoj Choudhary

IPC: H04L7/00 ,  H04L7/04 ,  H04B1/30 ,  H04B1/10 ,  H04L27/06 ,  H04L27/00 ,  H04L7/033 ,  H04B1/707 ,  H04B1/7183 ,  H04L25/00

CPC classification number: H04L7/0079 ,  H04B1/10 ,  H04B1/30 ,  H04B1/707 ,  H04B1/7183 ,  H04L7/0033 ,  H04L7/033 ,  H04L7/041 ,  H04L25/00 ,  H04L27/0014 ,  H04L27/06 ,  H04L27/063 ,  H04L2027/0028 ,  H04L2027/0067

Abstract: A method of performing synchronization in a super regenerative receiver (SRR) includes setting a quench rate of the SRR to a value of 1.5 times a chip rate of an incoming signal, acquiring an expected preamble sequence of an arbitrary sample set among a plurality of possible sample sets, acquiring an expected start frame delimiter (SFD) sequence for all of the possible sample sets to achieve frame synchronization, computing respective correlation metrics for bits of the expected SFD sequence while the expected SFD sequence is acquired for all of the possible sample sets, calculating a decision metric based on the correlation metrics in response to an SFD sequence being detected for one or more of the possible sample sets, and identifying a best sample set for demodulating the incoming signal among all of the possible sample sets based on the decision metric to achieve pulse synchronization.

公开(公告)号：US09054905B2

公开(公告)日：2015-06-09

申请号：US14155583

申请日：2014-01-15

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Debarati Sen ,  Jinesh P. Nair ,  Sujit Jos ,  Arun Naniyat

IPC: H04L25/02

CPC classification number: H04L25/0206 ,  H04L25/0204 ,  H04L25/0222 ,  H04L25/0224

Abstract: A method of timing synchronization in sub-band based ultra wideband systems, includes obtaining a coarse estimate of an offset in a time domain at a sub-sampled rate, and obtaining a fine estimate of the offset in an analog domain. The method further includes correcting a timing in the analog domain by transforming the fine estimate to an equivalent phase for the correcting.

Abstract translation: 一种在基于子带的超宽带系统中的定时同步的方法包括以子采样速率获得时域中的偏移量的粗略估计，并获得模拟域中的偏移的精细估计。 该方法还包括通过将精细估计转换为用于校正的等效相位来校正模拟域中的定时。