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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9531573 B1

PDFFull Text
Expired
Date of Patent:
Dec. 27, 2016

Filed:

Apr. 04, 2013

Methods and apparatus for cyclic prefix reduction in mmwave mobile communication systems

Applicant:

Samsung Electronics Co., Ltd, Suwon-si, Gyeonggi-do, KR;

Inventors:

Sridhar Rajagopal, Plano, TX (US);

Shadi Abu-Surra, Richardson, TX (US);

Ankit Gupta, Richardson, TX (US);

Sudhir Ramakrishna, Plano, TX (US);

Kaushik Josiam, Dallas, TX (US);

Zhouyue Pi, Allen, TX (US);

Ying Li, Richardson, TX (US);

Assignee:

Samsung Electronics Co., Ltd., Suwon-si, KR;

Attorney:
Primary Examiner:

Hirdepal Singh

Assistant Examiner:

Amneet Singh

Int. Cl.
CPC ...
H04K 1/10 (2006.01); H04L 27/28 (2006.01); H04L 27/26 (2006.01); H04J 13/00 (2011.01); H04B 7/06 (2006.01); H04L 1/00 (2006.01);
U.S. Cl.
CPC ...
H04L 27/2607 (2013.01); H04B 7/0695 (2013.01); H04J 13/0062 (2013.01); H04L 27/261 (2013.01); H04L 1/0031 (2013.01);
Abstract

To reduce the duration of a cyclic prefix used for a multiple input, multiple output (MIMO) communications channel, delay spread variations for different transmit/receive beam pair combination is estimated and used for fast beam switching and to support single user MIMO (SU-MIMO) even when the CP difference between two beams is large. Beam switching reference signals are employed to estimate delay spread exceeding current CP, and to support beam switching. CP covering sub-clusters within clusters for the MIMO channel are exploited to reduce the CP requirement and improve efficiency. Any one of a number of different CP durations may be selected for each different mobile station, using one of a finite set of subframe configurations for which the CP durations of different symbol locations within the subframe are predefined. Dynamically switching subframe configurations by the system accommodates high mobility.

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Rajagopal, Sridhar. (2016). Methods and apparatus for cyclic prefix reduction in mmwave mobile communication systems (U.S. Patent No. 9531573). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9531573

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