公开(公告)号：US08514979B2

公开(公告)日：2013-08-20

申请号：US12970151

申请日：2010-12-16

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: H03D3/00

CPC classification number: H04B1/0014 ,  H03D3/006

Abstract: A superheterodyne receiver includes an A/D converter for converting an IF signal to a stream of samples at a sampling frequency that is four times the IF and a splitter that splits the stream of samples into a first set of even samples and a second set of odd samples. A first quadrature demodulator demodulates just the first set of even samples to produce one of real (I) and imaginary (Q) components of a complex signal at one half of the sampling frequency, and a second, parallel quadrature demodulator demodulates just the second set of odd samples to produce the other of the I and Q components. The demodulated first set is filtered using a first subset of filter coefficients, and the demodulated second set is filtered using a second subset of filter coefficients. The filter outputs correspond to a baseband complex signal. The technology disclosed reduces overall hardware complexity and operating frequency by a factor of two or more.

Abstract translation: 超外差接收机包括：A / D转换器，用于以IF的四倍的采样频率将IF信号转换成采样流;以及分离器，其将样本流分解成第一组偶数样本，第二组 奇数样本。 第一正交解调器仅解调第一组偶数样本，以在采样频率的一半处产生复数信号的实数（I）和虚数（Q）分量之一，第二并联正交解调器仅解调第二组 的奇数样本以产生I和Q分量中的另一个。 使用滤波器系数的第一子集来对解调的第一集合进行滤波，并且使用滤波器系数的第二子集来滤波解调的第二集合。 滤波器输出对应于基带复合信号。 所公开的技术将整体硬件复杂性和操作频率降低了两倍或更多。

公开(公告)号：US08768995B2

公开(公告)日：2014-07-01

申请号：US13119163

申请日：2010-08-13

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: G06F17/17

CPC classification number: H03H17/0621 ,  H03H17/0223 ,  H03H17/0275 ,  H03H17/0685 ,  H03H2017/0247

Abstract: The multi-branch rate change filter of the present invention achieves higher effective output rates by processing the input sample stream in two or more parallel filter branches with offset states.

Abstract translation: 本发明的多分支速率变化滤波器通过处理具有偏移状态的两个或更多个并行滤波器分支中的输入采样流来实现更高的有效输出速率。

公开(公告)号：US09184771B2

公开(公告)日：2015-11-10

申请号：US13271515

申请日：2011-10-12

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: H03K9/00 ,  H04L27/06 ,  H04B1/00

CPC classification number: H04B1/0025

Abstract: A method and apparatus for digital down conversion and demodulation of a radio frequency (RF) signal are disclosed. A sampling frequency for sampling the RF signal is chosen, based on a bandwidth and a safety margin, so that a bandwidth of the sampled signal falls substantially within a predetermined frequency zone. The sampled signal may be digitally demodulated at a demodulation frequency selected to be substantially equal to a baseband alias of a carrier frequency of the signal.

Abstract translation: 公开了一种用于射频（RF）信号的数字下变频和解调的方法和装置。 基于带宽和安全裕度来选择用于采样RF信号的采样频率，使得采样信号的带宽基本上落在预定频率区域内。 采样信号可以被选择为基本上等于信号的载波频率的基带别名的解调频率被数字解调。

公开(公告)号：US08543074B1

公开(公告)日：2013-09-24

申请号：US13448763

申请日：2012-04-17

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: H04B1/26

CPC classification number: H04B1/0007 ,  H04L27/22 ,  H04L27/38

Abstract: In a digital receiver, an ADC converts an analog RF signal to a digital RF signal at a sample rate of fADC, which is converted into M parallel streams of RF samples. Each stream has a sampling rate of fADC/M, where M is a positive integer greater than 1. After translation into M parallel streams of IF samples centered about an IF of fADC/4, they are demodulated by applying first coefficients to even IF samples to produce even demodulated samples and applying second coefficients to odd IF samples to produce odd demodulated samples. The even samples are filtered using first filter coefficients and the odd samples are filtered using second filter coefficients to produce a complex baseband signal.

Abstract translation: 在数字接收机中，ADC以fADC的采样率将模拟RF信号转换为数字RF信号，其被转换成M个并行的RF样本流。 每个流具有fADC / M的采样率，其中M是大于1的正整数。在以fADC / 4的IF为中心的IF样本的M个并行流中转换后，通过将第一系数应用于均匀的IF采样来解调它们 以产生均匀的解调样本并将第二系数应用于奇数IF样本以产生奇解调样本。 使用第一滤波器系数对偶数采样进行滤波，并且使用第二滤波器系数对奇数采样进行滤波以产生复基带信号。

公开(公告)号：US20130094616A1

公开(公告)日：2013-04-18

申请号：US13271515

申请日：2011-10-12

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: H04L27/06

CPC classification number: H04B1/0025

Abstract: A method and apparatus for digital down conversion and demodulation of a radio frequency (RF) signal are disclosed. A sampling frequency for sampling the RF signal is chosen, based on a bandwidth and a safety margin, so that a bandwidth of the sampled signal falls substantially within a predetermined frequency zone. The sampled signal may be digitally demodulated at a demodulation frequency selected to be substantially equal to a baseband alias of a carrier frequency of the signal.

Abstract translation: 公开了一种用于射频（RF）信号的数字下变频和解调的方法和装置。 基于带宽和安全裕度来选择用于采样RF信号的采样频率，使得采样信号的带宽基本上落在预定频率区域内。 采样信号可以被选择为基本上等于信号的载波频率的基带别名的解调频率被数字解调。

公开(公告)号：US20120041995A1

公开(公告)日：2012-02-16

申请号：US13119163

申请日：2010-08-13

Applicant: Pierre-Andre Laporte

Inventor： Pierre-Andre Laporte

IPC: G06F17/17

CPC classification number: H03H17/0621 ,  H03H17/0223 ,  H03H17/0275 ,  H03H17/0685 ,  H03H2017/0247

Abstract: The present invention relates to a rate change filter having multiple branches. The multi-branch rate change filter of the present invention achieves higher effective output rates by processing the input sample stream in two or more parallel filter branches with offset states.

Abstract translation: 本发明涉及具有多个分支的速率变化滤波器。 本发明的多分支速率变化滤波器通过处理具有偏移状态的两个或更多个并行滤波器分支中的输入采样流来实现更高的有效输出速率。