公开(公告)号：US20170099654A1

公开(公告)日：2017-04-06

申请号：US15380949

申请日：2016-12-15

Applicant: Apple Inc.

Inventor： Moustafa M. Elsayed ,  Tarik Tabet ,  Konstantinos Sarrigeorgidis

IPC: H04W72/04 ,  H04W52/52

CPC classification number: H04W72/042 ,  H04W52/0209 ,  H04W52/0229 ,  H04W52/52 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/23 ,  Y02D70/24 ,  Y02D70/26

Abstract: An apparatus, system, and method for performing PDCCH preparation in RF circuitry are described. In one embodiment, power may be provided to a crystal oscillator to exit a first sleep state. One or more clocking signals may be provided to RF circuitry based on output from the crystal oscillator. Calibration and state restoration of the RF circuitry may be performed independent of baseband circuitry. A plurality of algorithms to prepare for receiving data form a wireless communication network may be performed independent of the baseband circuitry. After initiating the plurality of algorithms, state restoration of the baseband circuitry may be performed. Data may be received from a wireless communication network using the RF circuitry. The data may be processed using the baseband circuitry. State retention for the RF circuitry and the baseband circuitry may be performed. Finally, the crystal oscillator may be powered down to enter a second sleep state.

公开(公告)号：US20150373649A1

公开(公告)日：2015-12-24

申请号：US14445963

申请日：2014-07-29

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Konstantinos Sarrigeorgidis ,  S. Aon Mujtaba

IPC: H04W52/24 ,  H04L1/00 ,  H04L27/26 ,  H04L5/00

CPC classification number: H04W52/24 ,  H04L1/0041 ,  H04L1/0042 ,  H04L5/0023 ,  H04L5/0046 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0092 ,  H04L27/2626 ,  H04L27/3405 ,  H04W52/346

Abstract: Power allocation for encoded bits in OFDM systems. OFDM symbol subcarriers may be allocated to a wireless user equipment (UE) device by a base station. A first portion of the allocated subcarriers may include systematic bits and a second portion of the allocated subcarriers may include parity bits according to a coding scheme. Transmit power may be unevenly allocated to the subcarriers allocated to the UE, such that subcarriers including systematic bits are allocated different power than the subcarriers including parity bits. The OFDM symbols including the subcarriers allocated to the UE may be transmitted to the UE by the base station according to the allocated power distribution.

Abstract translation: OFDM系统中编码比特的功率分配。 OFDM符号子载波可以由基站分配给无线用户设备（UE）设备。 所分配的子载波的第一部分可以包括系统比特，并且所分配的子载波的第二部分可以包括根据编码方案的奇偶校验位。 发射功率可能不均匀地分配给分配给UE的子载波，使得包括系统比特的子载波被分配与包括奇偶校验位的子载波不同的功率。 包括分配给UE的子载波的OFDM符号可以由基站根据所分配的功率分布发送给UE。