公开(公告)号：US11050504B2

公开(公告)日：2021-06-29

申请号：US16807639

申请日：2020-03-03

Applicant: APPLE INC.

Inventor： Kathiravetpillai Sivanesan ,  Yaser Fouad ,  Vesh Raj Sharma Banjade ,  Joonbeom Kim ,  Balkan Kecicioglu ,  Yanzeng Fu ,  Rath Vannithamby

IPC: H04J13/00 ,  H04W72/04 ,  H04W52/24 ,  H04W74/08

Abstract: A base station can obtain channel quality conditions for mobile devices in a scheduling interval and identify a channel quality, a target transmission scheme, and a transmission power level for each of the mobile devices. The base station can assign a unique orthogonal CDMA code and can force the mobile devices to transmit K repeated bursts of uplink data such that each of the mobile devices has a rotated phase shift based on the unique orthogonal CDMA code assigned to each of the mobile devices with each of the mobile devices multiplexed on a same physical channel using an overlaid CDMA operation. The base station can process K repeated bursts that are multiplexed on the same physical channel using the overlaid CDMA operation. The base station can separate the mobile devices according to the unique orthogonal CDMA code and use IQ accumulation according to combine the K repeated bursts.

公开(公告)号：US20200313785A1

公开(公告)日：2020-10-01

申请号：US16807639

申请日：2020-03-03

Applicant: APPLE INC.

Inventor： Kathiravetpillai Sivanesan ,  Yaser Fouad ,  Vesh Raj Sharma Banjade ,  Joonbeom Kim ,  Balkan Kecicioglu ,  Yanzeng Fu ,  Rath Vannithamby

IPC: H04J13/00 ,  H04W72/04 ,  H04W52/24

Abstract: A base station can obtain channel quality conditions for mobile devices in a scheduling interval and identify a channel quality, a target transmission scheme, and a transmission power level for each of the mobile devices. The base station can assign a unique orthogonal CDMA code and can force the mobile devices to transmit K repeated bursts of uplink data such that each of the mobile devices has a rotated phase shift based on the unique orthogonal CDMA code assigned to each of the mobile devices with each of the mobile devices multiplexed on a same physical channel using an overlaid CDMA operation. The base station can process K repeated bursts that are multiplexed on the same physical channel using the overlaid CDMA operation. The base station can separate the mobile devices according to the unique orthogonal CDMA code and use IQ accumulation according to combine the K repeated bursts.