公开(公告)号：US08767893B2

公开(公告)日：2014-07-01

申请号：US13736825

申请日：2013-01-08

Applicant: QUALCOMM Incorporated

Inventor： Teresa H. Meng ,  David Su ,  Masoud Zargari

IPC: H03D3/00

CPC classification number: H04L27/148 ,  H03J7/04 ,  H04B1/38 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0022

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

Abstract translation: 本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间频率偏移的影响。 在本发明中，提供了在传输期间校正载波频率和采样频率的方法，包括这些方法的数字和模拟实现。 接收机确定发射机和接收机之间的相对频率偏移，并且当接收机在返回路径中将其数据发送到原始发射机时，使用该信息来校正该偏移，使得由原始发射机接收的信号在采样中， 载波频率锁定与原始发射机的本地频率参考。

公开(公告)号：US20130121387A1

公开(公告)日：2013-05-16

申请号：US13736825

申请日：2013-01-08

Applicant: QUALCOMM Incorporated

Inventor： Teresa H. Meng ,  David Kuochieh Su ,  Masoud Zargari

IPC: H04L7/033

CPC classification number: H04L27/148 ,  H03J7/04 ,  H04B1/38 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0022

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

Abstract translation: 本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间频率偏移的影响。 在本发明中，提供了在传输期间校正载波频率和采样频率的方法，包括这些方法的数字和模拟实施。 接收机确定发射机和接收机之间的相对频率偏移，并且当接收机在返回路径中将其数据发送到原始发射机时，使用该信息来校正该偏移，使得由原始发射机接收的信号在采样中， 载波频率锁定与原始发射机的本地频率参考。

公开(公告)号：US20140192850A1

公开(公告)日：2014-07-10

申请号：US14204922

申请日：2014-03-11

Applicant: QUALCOMM Incorporated

Inventor： Teresa H. Meng ,  David Kuochieh Su ,  Masoud Zargari

IPC: H04L27/148 ,  H04B1/38

CPC classification number: H04L27/148 ,  H03J7/04 ,  H04B1/38 ,  H04L7/033 ,  H04L27/0014 ,  H04L2027/0022

Abstract: The present invention aims at eliminating the effects of frequency offsets between two transceivers by adjusting frequencies used during transmission. In this invention, methods for correcting the carrier frequency and the sampling frequency during transmission are provided, including both digital and analog implementations of such methods. The receiver determines the relative frequency offset between the transmitter and the receiver, and uses this information to correct this offset when the receiver transmits its data to the original transmitter in the return path, so that the signal received by the original transmitter is in sampling and carrier frequency lock with the original transmitter's local frequency reference.

Abstract translation: 本发明旨在通过调整在传输期间使用的频率来消除两个收发机之间频率偏移的影响。 在本发明中，提供了在传输期间校正载波频率和采样频率的方法，包括这些方法的数字和模拟实现。 接收机确定发射机和接收机之间的相对频率偏移，并且当接收机在返回路径中将其数据发送到原始发射机时，使用该信息来校正该偏移，使得由原始发射机接收的信号在采样中， 载波频率锁定与原始发射机的本地频率参考。

公开(公告)号：US08908575B2

公开(公告)日：2014-12-09

申请号：US13747339

申请日：2013-01-22

Applicant: QUALCOMM Incorporated

Inventor： Masoud Zargari ,  Shahram Abdollahi-Alibeik

IPC: H04L5/14 ,  H04B1/50 ,  H04B17/00

CPC classification number: H04L5/14 ,  H04B1/50 ,  H04B17/11 ,  H04B17/14 ,  H04B17/21 ,  H04L27/368

Abstract: A frequency-division duplexing (FDD) transceiver includes a first mixer to up-convert a transmit signal and a first switch, coupled to the first mixer, to selectively provide a transmit local oscillator signal or a receive local oscillator signal to the first mixer. The transmit local oscillator signal has a first frequency and the receive local oscillator signal has a second frequency distinct from the first frequency. The FDD transceiver also includes a second mixer to down-convert a receive signal and a second switch, coupled to the second mixer, to selectively provide the transmit local oscillator signal or the receive local oscillator signal to the second mixer.

Abstract translation: 频分双工（FDD）收发器包括耦合到第一混频器的发送信号上变频的第一混频器和第一开关，以选择性地向第一混频器提供发送本地振荡器信号或接收本地振荡器信号。 发送本地振荡器信号具有第一频率，并且接收本地振荡器信号具有与第一频率不同的第二频率。 FDD收发器还包括第二混频器以对接收信号进行下变频和耦合到第二混频器的第二开关，以选择性地向第二混频器提供发送本地振荡器信号或接收本地振荡器信号。