公开(公告)号：US20170238328A1

公开(公告)日：2017-08-17

申请号：US15045137

申请日：2016-02-16

Applicant: QUALCOMM Incorporated

Inventor： Le Nguyen LUONG ,  RaviKiran GOPALAN

IPC: H04W72/08 ,  H04L12/26 ,  H04W4/00

CPC classification number: H04W72/085 ,  H04B1/713 ,  H04L7/042 ,  H04L43/16 ,  H04W4/80 ,  H04W56/008

Abstract: Systems and methods pertain to operating a receiver of wireless signals such as Bluetooth or Bluetooth Low Energy (BLE) signals. A correlator is provided to correlate a wireless signal received by the receiver with a device identifier corresponding to a wanted device from which the receiver wants to receive wireless signals, to generate a correlator output. An adaptive acquisition threshold generator generates an adaptive acquisition threshold based on a signal strength of the wireless signal, and a comparator is used to determine if the wireless signal is a wanted signal intended for the receiver, based on a comparison of the correlator output with the adaptive acquisition threshold.

公开(公告)号：US20170180171A1

公开(公告)日：2017-06-22

申请号：US14974958

申请日：2015-12-18

Applicant: QUALCOMM Incorporated

Inventor： Seyed Mohammad Ehsan HOSSEINI ,  RaviKiran GOPALAN ,  Yu-Han YANG ,  Markos TROULIS

IPC: H04L27/14 ,  H04L1/00

CPC classification number: H04L27/14 ,  H03M13/23 ,  H03M13/256 ,  H03M13/41 ,  H03M13/6325 ,  H04L1/0054 ,  H04L1/006 ,  H04L2027/004 ,  H04L2027/0065 ,  H04L2027/0093

Abstract: Systems and methods pertain to a receiver configured to receive and detect convolutionally coded Gaussian frequency-shift keying (GFSK) signals comprising a trellis of branches. The receiver implements a Per-Survivor Processing (PSP) algorithm to generate frequency estimate, phase estimate, and branch metric increment for each branch of a trellis. A Viterbi Algorithm is applied to the trellis for Maximum Likelihood Sequence Estimation (MLSE) of information bits. The receiver includes a PSP block comprising a number of blocks equal to the number of branches of the trellis. Each block includes a Phase Corrector, Decision Feedback Demodulator (DFD), and a Frequency Tracking Loop (FTL) to update the PSP variables.

公开(公告)号：US20150358188A1

公开(公告)日：2015-12-10

申请号：US14576511

申请日：2014-12-19

Applicant: QUALCOMM Incorporated

Inventor： RaviKiran GOPALAN

IPC: H04L27/14 ,  H04W4/00

CPC classification number: H04L27/14 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0057 ,  H04L1/08 ,  H04W4/80

Abstract: A method of joint demodulating and demapping of a digital signal includes receiving a first sequence of the digital signal. The digital signal has a pattern in which a norm of an ideal transmitted sequence of symbols for zero is equal to a norm of an ideal transmitted sequence of symbols for one. The method also includes defining a portion of the first sequence as a third sequence, determining, for each element of a set of the third sequence, one of a real part of a value or an imaginary part of the value of the element, calculating a value for a combination of the determined one of the real part of the value or the imaginary part of the value for the each element of the set, and setting a bit equal to one in response to the value for the combination being less than zero.

Abstract translation: 联合解调和解映射数字信号的方法包括接收数字信号的第一序列。 数字信号具有其中理想发送的零符号序列的范数等于理想发送的符号序列的范数为1的模式。 所述方法还包括将所述第一序列的一部分定义为第三序列，为所述第三序列的集合的每个元素确定所述元素的值的实部或所述元素的虚部的一个，计算所述第一序列的值 为组合的每个元素的值的实部或虚部的确定的一个的组合的值，以及响应于组合的值小于零而设置等于1的位的值。