公开(公告)号：US06373909B1

公开(公告)日：2002-04-16

申请号：US09426782

申请日：1999-10-22

Applicant: Björn Lindquist ,  Jan Celander ,  Sven Mattisson

Inventor： Björn Lindquist ,  Jan Celander ,  Sven Mattisson

IPC: H03D104

Abstract: A communications terminal having a receiver and a method therefor is provided that substantially removes a known interferer from a digitally translated intermediate frequency signal. More specifically, the receiver includes an antenna for receiving a signal, and at least one combination of a mixer and filter for translating in the analog domain the signal to the intermediate frequency signal while maintaining separation from baseband. The receiver also includes a digitizer for digitally translating the intermediate frequency signal containing the known interferer from the analog domain into the digital domain, and an interference cancellation system for removing the known interferer from the digitally translated intermediate frequency signal by utilizing either a DC offset compensator or a correlator compensator.

公开(公告)号：US08731500B2

公开(公告)日：2014-05-20

申请号：US12361578

申请日：2009-01-29

Applicant: Leif Wilhelmsson ,  Jan Celander ,  Lars Sundström

Inventor： Leif Wilhelmsson ,  Jan Celander ,  Lars Sundström

IPC: H04B17/02

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: A gain control circuit adjusts the signal level of a received signal responsive to the bandwidth a received signal and/or the delay spread of the channel in which the signal has propagated. The bandwidth and delay spread are evaluated to estimate the amount of signal variation that is expected due to fast fading. Adjustments to the signal level are then made to avoid clipping while at the same time ensuring that the dynamic range of a receiver component is efficiently utilized.

Abstract translation: 增益控制电路响应于接收信号的带宽和/或信号已经传播的信道的延迟扩展来调整接收信号的信号电平。 评估带宽和延迟扩展以估计由于快速衰落所预期的信号变化量。 然后进行对信号电平的调整，以避免削波，同时确保接收器组件的动态范围得到有效利用。

公开(公告)号：US20100189203A1

公开(公告)日：2010-07-29

申请号：US12361578

申请日：2009-01-29

Applicant: Leif Wilhelmsson ,  Jan Celander ,  Lars Sundstrom

Inventor： Leif Wilhelmsson ,  Jan Celander ,  Lars Sundstrom

IPC: H04L27/08

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: A gain control circuit adjusts the signal level of a received signal responsive to the bandwidth a received signal and/or the delay spread of the channel in which the signal has propagated. The bandwidth and delay spread are evaluated to estimate the amount of signal variation that is expected due to fast fading. Adjustments to the signal level are then made to avoid clipping while at the same time ensuring that the dynamic range of a receiver component is efficiently utilized.

Abstract translation: 增益控制电路响应于接收信号的带宽和/或信号已经传播的信道的延迟扩展来调整接收信号的信号电平。 评估带宽和延迟扩展以估计由于快速衰落所预期的信号变化量。 然后进行对信号电平的调整，以避免削波，同时确保接收器组件的动态范围得到有效利用。

公开(公告)号：US6029052A

公开(公告)日：2000-02-22

申请号：US886244

申请日：1997-07-01

Applicant: Martin Isberg ,  Bjorn Lindquist ,  Peter Jakobsson ,  Jan Celander ,  Kjell Gustafsson ,  Lars-Peter Kunkel ,  Torsten Carlsson ,  Jacob Mannerstr.ang.le

Inventor： Martin Isberg ,  Bjorn Lindquist ,  Peter Jakobsson ,  Jan Celander ,  Kjell Gustafsson ,  Lars-Peter Kunkel ,  Torsten Carlsson ,  Jacob Mannerstr.ang.le

IPC: H04L27/22 ,  H03J5/24 ,  H04B1/16 ,  H04B1/30 ,  H04B1/40 ,  H04J1/04 ,  H04W88/06 ,  H04Q7/32

CPC classification number: H04W88/06 ,  H03J5/244 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/406

Abstract: A multiple-mode receiver incorporating direct conversion (processing received signals using intermediate frequencies within the same frequency range as the received signal bandwidth) rather than superheterodyne circuitry, allowing receiver hardware components to be re-used rather than replicated for each band. Various embodiments are disclosed in which low pass filters, mixers, quadrature generators, oscillators, and amplifiers are re-used.

Abstract translation: 包括直接转换的多模式接收机（处理使用与接收信号带宽相同的频率范围内的中频）的接收信号，而不是超外差电路，允许重复使用接收机硬件组件而不是复制每个频带。 公开了各种实施例，其中重新使用低通滤波器，混频器，正交发生器，振荡器和放大器。