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.:
Date of Patent:
Nov. 09, 2021
Filed:
Oct. 28, 2019
Qualcomm Incorporated, San Diego, CA (US);
Jay Rodney Walton, Waban, MA (US);
Lizhong Zheng, Lexington, MA (US);
John W. Ketchum, Harwich, MA (US);
Mark S. Wallace, Bedford, MA (US);
Steven J. Howard, Ashland, MA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Spatial spreading is performed in a multi-antenna system to randomize an 'effective' channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system, at a transmitting entity, data is processed (e.g., encoded, interleaved, and modulated) to obtain Ndata symbol blocks to be transmitted in Ntransmission spans, where N≥1 and N>1. The Nblocks are partitioned into Ndata symbol subblocks, one subblock for each transmission span. A steering matrix is selected (e.g., in a deterministic or pseudo-random manner from among a set of L steering matrices, where L>1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols, which are further processed and transmitted via Ntransmit antennas in one transmission span. The Ndata symbol blocks are thus spatially processed with Nsteering matrices and observe an ensemble of channels.