公开(公告)号：US20190110294A1

公开(公告)日：2019-04-11

申请号：US16209172

申请日：2018-12-04

Applicant: Sun Patent Trust

Inventor： Shinsuke Takaoka ,  Masayuki Hoshino ,  Kenichi Miyoshi

IPC: H04W72/04 ,  H04J4/00

CPC classification number: H04W72/0453 ,  G06F17/141 ,  H04J1/00 ,  H04J4/005 ,  H04J11/00 ,  H04L5/0041 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04W88/08 ,  Y10S370/916

Abstract: A communication apparatus includes a receiver, a combiner, and a transformer. The receiver receives signals mapped on plural frequency bands. A size of at least one of the frequency bands is a multiple of a product of two or more powers of prime numbers, which are integer numbers greater than 1 and are different from each other. An exponent for at least one of the prime numbers is an integer greater than 1. The combiner combines the received signals into a combined signal. The transformer transforms the combined signal in a frequency domain into a symbol sequence in a time domain with an inverse discrete Fourier transform (IDFT) having a size that is a product of powers of plural values. The values are integer numbers greater than 1 and are different from each other. An exponent for at least one of the values is an integer greater than 1.

公开(公告)号：US20180034491A1

公开(公告)日：2018-02-01

申请号：US15728472

申请日：2017-10-09

Applicant: Aviat U.S., Inc.

Inventor： Sreco Plevel

IPC: H04B1/12 ,  H04J4/00 ,  H04L27/36 ,  H04L25/03 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04B1/123 ,  H04J4/005 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0228 ,  H04L25/03159 ,  H04L27/2613 ,  H04L27/2647 ,  H04L27/366

Abstract: An example system comprises a first antenna and a modem. The first antenna is configured to receive a signal from a transmitting radio frequency unit. The signal includes data and a known sequence. The modem is configured to retrieve the known sequence from the signal, transform the known sequence and the data into a frequency domain, calculate averages of groups of neighboring frequency points in the frequency domain to reduce the effect of nonlinear noise in the signal, the neighboring frequency points corresponding to the preamble in the frequency domain, compare the calculated averages to an expected frequency response in the frequency domain, determine a correction filter to apply to the data based on the comparison, apply the correction filter on the data in the frequency domain to create corrected data, transform the corrected data from the frequency domain to the time domain, and provide the data.

公开(公告)号：US09516648B2

公开(公告)日：2016-12-06

申请号：US14979109

申请日：2015-12-22

Applicant: Sun Patent Trust

Inventor： Shinsuke Takaoka ,  Masayuki Hoshino ,  Kenichi Miyoshi

IPC: H04J1/00 ,  G06F17/14 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26 ,  H04J11/00 ,  H04J4/00 ,  H04W88/08

CPC classification number: H04W72/0453 ,  G06F17/141 ,  H04J1/00 ,  H04J4/005 ,  H04J11/00 ,  H04L5/0041 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04W88/08 ,  Y10S370/916

Abstract: A communication apparatus includes a receiver, a combiner, and a transformer. The receiver receives signals mapped on plural frequency bands. A size of at least one of the frequency bands is a multiple of a product of two or more powers of prime numbers, which are integer numbers greater than 1 and are different from each other. An exponent for at least one of the prime numbers is an integer greater than 1. The combiner combines the received signals into a combined signal. The transformer transforms the combined signal in a frequency domain into a symbol sequence in a time domain with an inverse discrete Fourier transform (IDFT) having a size that is a product of powers of plural values. The values are integer numbers greater than 1 and are different from each other. An exponent for at least one of the values is an integer greater than 1.

Abstract translation: 通信装置包括接收机，组合器和变压器。 接收机接收映射在多个频带上的信号。 频带中的至少一个的大小是素数的两个或更多个幂的乘积的倍数，其是大于1并且彼此不同的整数。 素数中的至少一个的指数是大于1的整数。组合器将接收到的信号组合成组合信号。 变压器将具有尺寸为多值的乘积的反离散傅立叶变换（IDFT）的频域中的组合信号变换为时域中的符号序列。 这些值是大于1的整数，彼此不同。 至少一个值的指数是大于1的整数。

公开(公告)号：US20150229425A1

公开(公告)日：2015-08-13

申请号：US14694960

申请日：2015-04-23

Applicant: Panasonic Intellectual Property Corporation of America

Inventor： Shinsuke TAKAOKA ,  Masayuki HOSHINO ,  Kenichi MIYOSHI

IPC: H04J4/00 ,  H04W72/04

CPC classification number: H04W72/0453 ,  G06F17/141 ,  H04J1/00 ,  H04J4/005 ,  H04J11/00 ,  H04L5/0041 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04W88/08 ,  Y10S370/916

Abstract: Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit (110), a division unit (111), and a mapping unit (112). The DFT unit (110) uses the DFT matrix to execute a DFT process on a symbol sequence in a time region to generate a signal (SC-FDMA signal) of the frequency region. The division unit (111) generates a plurality of clusters by dividing the SC-FDMA signal with a partially orthogonal bandwidth corresponding to the vector length of some of the column vectors constituting the DFT matrix used in the DFT unit (110) and orthogonally intersecting at least partially. The mapping unit (112) maps the clusters to discontinuous frequency bands.

Abstract translation: 提供一种无线电通信装置，即使当SC-FDMA信号被划分为多个群集并且群集分别映射到不连续的频带时，其也可以减少由正交DFT矩阵的破坏引起的ISI。 无线通信装置包括DFT单元（110），分割单元（111）和映射单元（112）。 DFT单元（110）使用DFT矩阵对时间区域中的符号序列执行DFT处理，以生成频率区域的信号（SC-FDMA信号）。 分割单元（111）通过用对应于构成在DFT单元（110）中使用的DFT矩阵的一些列向量的矢量长度的部分正交带宽划分SC-FDMA信号并且在正交带宽上正交相交 最少部分。 映射单元（112）将簇映射到不连续的频带。

公开(公告)号：US09042213B2

公开(公告)日：2015-05-26

申请号：US14072668

申请日：2013-11-05

Applicant: Panasonic Corporation

Inventor： Shinsuke Takaoka ,  Masayuki Hoshino ,  Kenichi Miyoshi

IPC: H04L5/08 ,  H04J1/08 ,  H04J1/16 ,  H04L27/26 ,  H04L5/00 ,  H04J11/00

CPC classification number: H04W72/0453 ,  G06F17/141 ,  H04J1/00 ,  H04J4/005 ,  H04J11/00 ,  H04L5/0041 ,  H04L27/2602 ,  H04L27/2628 ,  H04L27/2636 ,  H04W88/08 ,  Y10S370/916

Abstract: Provided is a radio communication device which can reduce ISI caused by destruction of an orthogonal DFT matrix even when an SC-FDMA signal is divided into a plurality of clusters and the clusters are respectively mapped to discontinuous frequency bands. The radio communication device includes a DFT unit (110), a division unit (111), and a mapping unit (112). The DFT unit (110) uses the DFT matrix to execute a DFT process on a symbol sequence in a time region to generate a signal (SC-FDMA signal) of the frequency region. The division unit (111) generates a plurality of clusters by dividing the SC-FDMA signal with a partially orthogonal bandwidth corresponding to the vector length of some of the column vectors constituting the DFT matrix used in the DFT unit (110) and orthogonally intersecting at least partially. The mapping unit (112) maps the clusters to discontinuous frequency bands.

Abstract translation: 提供一种无线电通信装置，即使当SC-FDMA信号被划分为多个群集并且群集分别映射到不连续的频带时，其也可以减少由正交DFT矩阵的破坏引起的ISI。 无线通信装置包括DFT单元（110），分割单元（111）和映射单元（112）。 DFT单元（110）使用DFT矩阵对时间区域中的符号序列执行DFT处理，以生成频率区域的信号（SC-FDMA信号）。 分割单元（111）通过用对应于构成在DFT单元（110）中使用的DFT矩阵的一些列向量的矢量长度的部分正交带宽划分SC-FDMA信号并且在正交带宽上正交相交 最少部分。 映射单元（112）将簇映射到不连续的频带。

公开(公告)号：US06552832B1

公开(公告)日：2003-04-22

申请号：US09285027

申请日：1999-04-01

Applicant: John D. Beierle ,  William C. G. Ortel ,  Jacob Needle

Inventor： John D. Beierle ,  William C. G. Ortel ,  Jacob Needle

IPC: H04J400

CPC classification number: H04H20/69 ,  H04J4/005 ,  H04J14/0227 ,  H04J14/0245 ,  H04J14/0249 ,  H04J14/0282 ,  H04Q11/0005 ,  H04Q2011/0039

Abstract: A telecommunications system provides telephone services to subscriber locations over dedicated optical fibers which extend in a “star” configuration from a telephone central office. A transmultiplexer installed at the central office is connected between a digital switch and the optical fibers. The transmultiplexer has a plurality of FDM ports, each of which is connected to a respective one of the optical fibers. The transmultiplexer is connected by one or more TDM ports to the digital switch. Preferably, the transmultiplexer provides a concentrating function whereby the number of subscriber lines served by the transmultiplexer is greater than the total voice-grade channel capacity of the connection between the transmultiplexer and the digital switch.

Abstract translation: 电信系统通过专用光纤向用户位置提供电话服务，这些专用光纤以“星形”配置从电话中心局延伸。 安装在中央办公室的多路复用器连接在数字开关和光纤之间。 多路复用器具有多个FDM端口，每个端口连接到相应的一根光纤。 多路复用器通过一个或多个TDM端口连接到数字交换机。 优选地，多路复用器提供集中功能，由此由多路复用器服务的用户线路的数量大于多路复用器和数字交换机之间的连接的总语音级信道容量。

公开(公告)号：US20020106009A1

公开(公告)日：2002-08-08

申请号：US09727558

申请日：2000-12-01

Applicant: MOTOROLA, INC.

Inventor： Robert M. Harrison

IPC: H04B001/38 ,  H04L005/16

CPC classification number: H04J4/005

Abstract: A transmultiplexer (202) is provided for transmultiplexing digitized signal samples (244) produced by a converter. The transmultiplexer (202) comprises a first Fourier transformer bank (304) configured to transform the digital signal samples (244) produced by the digitizer into frequency domain input signals (320). The transmultiplexer (202) also comprises a frequency domain shifter bank (306) configured to circularly shift the frequency domain input signals (320) to produce shifted signals (324). A frequency domain pre-filter bank (308) is configured to perform a first fast convolution with the shifted signals (324) and a first discrete Fourier transform of a first filtering function to produce filtered input signals (330), and a combining Fourier transformer (310) is configured to transform the filtered input signals (330) to produce output signals (348) containing a sample corresponding to a down-converted channel.

Abstract translation: 提供了一种多路复用器（202），用于对由转换器产生的数字化信号样本（244）进行多路复用。 多路复用器（202）包括被配置为将由数字转换器产生的数字信号采样（244）转换成频域输入信号（320）的第一傅里叶变换器组（304）。 多路复用器（202）还包括频域移位器组（306），其被配置为循环移位频域输入信号（320）以产生移位信号（324）。 频域预滤波器组（308）被配置为执行与移位的信号（324）的第一快速卷积和第一滤波函数的第一离散付里叶变换以产生经滤波的输入信号（330），以及组合傅立叶变换器 （310）被配置为变换经滤波的输入信号（330）以产生包含对应于下变频信道的样本的输出信号（348）。

公开(公告)号：US5430711A

公开(公告)日：1995-07-04

申请号：US201989

申请日：1994-02-25

Applicant: Yoshifumi Yamada ,  Tadashi Shibato

Inventor： Yoshifumi Yamada ,  Tadashi Shibato

IPC: H04J1/06 ,  H04J4/00 ,  H04J11/00

CPC classification number: H04J1/06 ,  H04J4/005

Abstract: A group modulator provided a plurality of digitally modulated signals with frequency division multiplex, having a time division multiplexer (11) for multiplexing a plurality of input data (#l through #n). A mapping circuit (12) provides an I-channel signal and a Q-channel signal according to a pattern of the multiplexed signal and the modulation system. A pulse shaping circuit (13) restricts bandwidth of the I-channel signal and the Q-channel signal. A frequency shift circuit (14) shifts frequency of the I-channel signal and the Q-channel signal by the frequency defined by the carrier control signal (i) for each input data. An accumulator (21,22) accumulates each of the I-channel signal and the Q-channel signal of the output of the frequency shift circuit (14) during a predetermined period (T). A D/A converter (31, 32) converts the output of the accumulator from digital form to analog form. A low pass filter (41, 42) is provided at the output of the D/A converter. A quadrature modulator (5) modulates carrier frequency (f.sub.c) with quadrature modulation according to the I-channel signal and the Q-channel signal at the output of the low pass filter. A multiplicity control (6) controls multiplicity in the time division multiplexer (11) according to an external multiplicity signal.

Abstract translation: 组调制器提供具有频分复用的多个数字调制信号，具有用于复用多个输入数据（＃1至＃n）的时分多路复用器（11）。 映射电路（12）根据复用信号和调制系统的模式提供I信道信号和Q信道信号。 脉冲整形电路（13）限制I信道信号和Q信道信号的带宽。 频移电路（14）通过对于每个输入数据由载波控制信号（i）定义的频率移位I信道信号和Q信道信号的频率。 累加器（21,22）在预定时段（T）期间累积频移电路（14）的输出的I信道信号和Q信道信号中的每一个。 D / A转换器（31,32）将累加器的输出从数字形式转换成模拟形式。 在D / A转换器的输出处提供低通滤波器（41,42）。 正交调制器（5）根据I通道信号和低通滤波器输出端的Q信道信号，调制载波频率（fc）。 多重控制（6）根据外部多重信号控制时分复用器（11）中的多重性。

公开(公告)号：US4754449A

公开(公告)日：1988-06-28

申请号：US881439

申请日：1986-07-02

Applicant: Rex J. Crookshanks

Inventor： Rex J. Crookshanks

IPC: H04J4/00 ,  H04J1/02

CPC classification number: H04J4/005

Abstract: A device for transforming N-Frequency Division Multiplexed (FDM) channels (21) of modulated signals into individually accessible streams (46) of demodulated data employs a Fourier transform processor (10) to transform the N-FDM channels into a single, TDM (Time Division Multiplex) channel of data, a single demodulator (12) for demodulating the single TDM channel and a demultiplexer (14) for demultiplexing the single channel of TDM data. The symbol segments of the N-FDM channels are synchronized with each other using an error signal generator (78) and a dither technique in which a symbol window is shifted back and forth to determine whether the symbol segments are early, on time or late. In a preferred form, the demodulator and error signal generator are implemented using digital techniques. The Fourier transform processor (10) includes a pair of analog dispersion sections (26, 42) for introducing delays in the FDM signals as nominal monotonic delay functions of frequency, a frequency sweep section (35) and a calibration section (45) for compensating for deviations in the differential delay for functions such that the output of the second analog dispersion section is substantially that calculated for an ideal system.

Abstract translation: 用于将调制信号的N频分复用（FDM）信道（21）变换为解调数据的独立可访问流（46）的设备使用傅里叶变换处理器（10）将N-FDM信道变换成单个TDM（ 时分复用）数据通道，用于解调单个TDM信道的单个解调器（12）和用于解复用TDM数据的单个信道的解复用器（14）。 N-FDM通道的符号段使用误差信号发生器（78）和抖动技术彼此同步，其中符号窗口来回移动以确定符号段是按时间还是晚期。 在优选的形式中，使用数字技术来实现解调器和误差信号发生器。 傅立叶变换处理器（10）包括一对模拟色散部分（26,42），用于将FDM信号中的延迟作为频率的标称单调延迟函数，频率扫描部分（35）和用于补偿的校准部分（45） 对于功能的差分延迟的偏差，使得第二模拟色散部分的输出基本上是为理想系统计算的。

公开(公告)号：US4324000A

公开(公告)日：1982-04-06

申请号：US110590

申请日：1980-01-09

Applicant: Zaheer M. Ali

Inventor： Zaheer M. Ali

IPC: H04J4/00 ,  H04J1/05 ,  H04J3/02

CPC classification number: H04J4/005

Abstract: An interface circuit is provided to convert serial, 30 channel, compressed, sign magnitude FDM-PCM data provided by a pair of voice communication codecs (code/decode) into parallel, 60 channel, expanded (linear), 2's complement PCM data, so that it can be used in an FDM/TDM processor. The conversion process is reversed on the return of data from the FDM/TDM processor to the codecs. A unique method of read/write and memory address control provides specific ordering of data and alternating two-way data flow in rapid succession.

Abstract translation: 提供了一个接口电路，用于将由一对语音通信编解码器（代码/解码）提供的串行，30通道，压缩，符号幅度的FDM-PCM数据转换为并行，60通道，扩展（线性），2的补码PCM数据，因此 它可以在FDM / TDM处理器中使用。 在从FDM / TDM处理器返回数据到编解码器时，转换过程相反。 读/写和存储器地址控制的独特方法提供数据的特定顺序和交替的双向数据流快速连续。