公开(公告)号：US06810020B2

公开(公告)日：2004-10-26

申请号：US09772207

申请日：2001-01-29

申请人： Eun-Ee Cho ,  Ho Kim ,  Jong-Hyeon Park

发明人： Eun-Ee Cho ,  Ho Kim ,  Jong-Hyeon Park

IPC分类号： H04J1100

CPC分类号： H04L5/0048 ,  H04L1/20 ,  H04L5/0007 ,  H04L27/2656

摘要： Disclosed is an apparatus for measuring a bit error rate (BER) in an orthogonal frequency division multiplexing (OFDM) communication system. A transmitter includes a pilot pattern inserter for inserting a first reference pilot pattern in subchannels of input data, and an OFDM modulator for OFDM-modulating the reference pilot pattern-inserted transmission data. A receiver includes a pilot pattern detector for OFDM-demodulating a data symbol received in a frame unit and detecting only a pilot pattern, and a BER operator for comparing the demodulated pilot pattern with a second reference pilot pattern, detecting and accumulating the number of pilot errors, and measuring a bit error rate by dividing the accumulated number of the pilot errors by the number of total received pilot patterns.

摘要翻译： 公开了一种用于测量正交频分复用（OFDM）通信系统中的误码率（BER）的装置。 发射机包括用于在输入数据的子信道中插入第一参考导频模式的导频模式插入器和用于OFDM调制参考导频模式插入传输数据的OFDM调制器。 接收机包括用于OFDM解调以帧单元接收的数据符号并仅检测导频模式的导频模式检测器，以及用于将解调的导频模式与第二参考导频模式进行比较的BER算子，检测和累加导频数 通过将导频误差的累计数除以总接收导频模式的数量来测量误码率。

公开(公告)号：US06593882B1

公开(公告)日：2003-07-15

申请号：US10106608

申请日：2002-03-26

申请人： Je-Woo Kim ,  Jong-Hyeon Park ,  Bok-Tae Shim ,  Sang-Hoon Roh ,  Tae-Ryun Chang

发明人： Je-Woo Kim ,  Jong-Hyeon Park ,  Bok-Tae Shim ,  Sang-Hoon Roh ,  Tae-Ryun Chang

IPC分类号： H01Q326

CPC分类号： H04B7/086 ,  H04B7/0851 ,  H04B7/0854

摘要： There are provided adaptive beamforming algorithms for an adaptive array smart antenna. According to one embodiment of the present invention, the adaptive array smart antenna constructs an input signal matrix with a predetermined number of input signals, computes a transmission signal matrix that minimizes a cost function using a first steering matrix set to an initial value and the input signal matrix, computes a second steering matrix that minimizes the cost function using the transmission signal matrix and the input signal matrix, maps the second steering matrix on a unit circle, constructs a third steering matrix with the mapped values, normalizes the third steering matrix and determining whether the third steering matrix converges, and demodulates data using the transmission signal matrix if the third steering matrix converges.

摘要翻译： 为自适应阵列智能天线提供了自适应波束成形算法。 根据本发明的一个实施例，自适应阵列智能天线构建具有预定数量的输入信号的输入信号矩阵，计算使用设置为初始值的第一导引矩阵和输入的最小化成本函数的传输信号矩阵 信号矩阵，计算使用传输信号矩阵和输入信号矩阵使成本函数最小化的第二导引矩阵，将第二导引矩阵映射在单位圆上，构建具有映射值的第三导引矩阵，归一化第三导引矩阵， 确定第三导引矩阵是否收敛，并且如果第三导引矩阵收敛则使用传输信号矩阵来解调数据。

公开(公告)号：US06522687B2

公开(公告)日：2003-02-18

申请号：US09775600

申请日：2001-02-05

申请人： Jong-Hyeon Park ,  Je-Woo Kim

发明人： Jong-Hyeon Park ,  Je-Woo Kim

IPC分类号： H04B1500

CPC分类号： H04L25/069 ,  H04B1/707 ,  H04B2201/70701 ,  H04L27/206 ,  H04L27/2273

摘要： A data transmitter and receiver in a DS-CDMA communication system designed to prevent a serious amplitude shift in a transmission signal, facilitate recovery of data and clock signals and relieve the constraint of using a high linearity, high performance amplifier. The data transmitter includes a spread signal generating device, in which I-arm and Q-arm information signals of the first channel are spread by I-arm and Q-arm PN codes, respectively, and I-arm and Q-arm information signals of a predetermined number of following channels are spread by an inverted Q-arm PN code and the I-arm PN code, respectively. The data receiver includes a despread signal generating device, in which an I-arm despread signal is generated by multiplying I-arm and Q-arm digital baseband spread signals by I-arm and Q-arm PN codes, respectively, and adding the multiplication results, while a Q-arm despread signal is generated by multiplying Q-arm and I-arm digital baseband spread signal by an inverted I-arm PN code and the Q-arm PN code, respectively, and adding the multiplication results.

摘要翻译： DS-CDMA通信系统中的数据发射机和接收机，旨在防止传输信号的严重幅度偏移，便于恢复数据和时钟信号，并减轻使用高线性，高性能放大器的约束。 数据发送器包括扩展信号发生装置，其中第一通道的I臂和Q臂信息信号分别由I臂和Q臂PN代码扩展，I臂和Q臂信息信号 的预定数量的后续通道分别由反向Q臂PN码和I型PN码扩展。 数据接收机包括解扩信号发生装置，其中分别通过I臂和Q臂数字基带扩展信号乘以I臂和Q-arm PN码产生I臂解扩信号，并且将乘法相加 结果，通过将Q臂和I臂数字基带扩展信号分别乘以反相I臂PN码和Q-臂PN码分别产生Q臂解扩信号，并相加乘法结果。

公开(公告)号：US06396823B1

公开(公告)日：2002-05-28

申请号：US09222669

申请日：1998-12-29

申请人： Jong-Hyeon Park ,  Je-Woo Kim

发明人： Jong-Hyeon Park ,  Je-Woo Kim

IPC分类号： H04B7216

CPC分类号： H04B1/7143 ,  H04W88/08

摘要： A small and lightweight base station transceiver utilizes a plurality of low-powered time division duplexing switches instead of a single high-powered time division duplexing switch. The base station transceiver includes a forward signal path, a reverse signal path, and a plurality of time division duplexing switches being switchable to the forward signal path or the reverse signal path according to a time division duplexing timing control signal generated from a time division duplexing timing controller. The plurality of time division duplexing switches corresponds to N time division duplexing switches where the symbol N represents a number. Output signals of the time division duplexing switches are filtered in a plurality of N bandpass filters, coupled in a junction coupler, and then radiated in the air through first and second antennas. The junction coupler couples the outputs of odd-numbered bandpass filters to transfer the coupled signals to the first antenna, and couples the outputs of even-numbered bandpass filters to transfer the coupled signal to the second antenna, so as to reduce mutual interference among the channels.

摘要翻译： 小而轻量级的基站收发器利用多个低功率时分双工交换机，而不是单个高功率时分双工开关。 基站收发机包括根据从时分复用产生的时分双工定时控制信号可转换到前向信号路径或反向信号路径的正向信号路径，反向信号路径和多个时分双工器开关 定时控制器 多个时分复用交换机对应于N个时分双工开关，其中符号N表示数字。 时分双工开关的输出信号在多个N个带通滤波器中进行滤波，耦合在耦合耦合器中，然后通过第一和第二天线在空气中辐射。 连接耦合器耦合奇数带通滤波器的输出，将耦合的信号传送到第一天线，并耦合偶数带通滤波器的输出，以将耦合的信号传送到第二天线，以减少相互干扰 频道

公开(公告)号：US20060184862A1

公开(公告)日：2006-08-17

申请号：US11392438

申请日：2006-03-28

申请人： Je-Woo Kim ,  Jong-Hyeon Park ,  Bok-Tae Shim ,  Si-Hyun Bae ,  Kyung-Sup Han

发明人： Je-Woo Kim ,  Jong-Hyeon Park ,  Bok-Tae Shim ,  Si-Hyun Bae ,  Kyung-Sup Han

IPC分类号： H03M13/00

CPC分类号： H04L1/04 ,  H03M13/2703 ,  H03M13/31 ,  H04L1/004 ,  H04L1/0041 ,  H04L1/0057 ,  H04L1/0071 ,  H04L1/06 ,  H04L1/08 ,  H04L5/0023 ,  H04L5/0044 ,  H04L25/0204 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2614 ,  H04L27/262

摘要： An orthogonal frequency division multiplexing (OFDM) communication system and method for improving frequency utilization efficiency. In the system, a Reed-Solomon encoder codes input information data, and outputs a Reed-Solomon block comprised of a second number of Reed-Solomon symbols each comprised of a first number of Reed-Solomon symbol elements. An interleaver receives the Reed-Solomon block, and disperses the Reed-Solomon symbol elements existing in a specified one Reed-Solomon symbol within the received Reed-Solomon block in the same sub-channel positions in a fourth number of sub-channels of each of a third number of consecutive OFDM symbols.

摘要翻译： 一种用于提高频率利用效率的正交频分复用（OFDM）通信系统和方法。 在该系统中，Reed-Solomon编码器对输入信息数据进行编码，并且输出由第一数目Reed-Solomon符号元素组成的Reed-Solomon符号组成的Reed-Solomon码元组成的Reed-Solomon码块。 交织器接收Reed-Solomon块，并将存在于指定的Reed-Solomon符号中的Reed-Solomon符号分散在接收的Reed-Solomon块中的相同子信道位置中，每个子信道位置在每个的第四数量的子信道中 的第三数量的连续OFDM符号。

公开(公告)号：US5970055A

公开(公告)日：1999-10-19

申请号：US917062

申请日：1997-08-25

申请人： Jong-Hyeon Park ,  Je-Woo Kim ,  In-Seen Baek

发明人： Jong-Hyeon Park ,  Je-Woo Kim ,  In-Seen Baek

IPC分类号： H04B1/713 ,  H04B7/26 ,  H04L5/14 ,  H04J13/06

CPC分类号： H04B1/7136 ,  H04B7/2615 ,  H04L5/1484 ,  H04B2001/71365

摘要： A radio communication system adapting TDD/FH, for reducing interference of jammer, preventing third party's hearing, and enhancing frequency usage efficiency. The radio communication system adapting time division duplexing/frequency hopping, having: a data source for providing transmission data or receiving input of reception data; a hop frequency generator for generating frequency changed as frequencies preset at every given time; a frequency modulator for modulating frequency according to the transmission frequency corresponding to the hop frequency with provision of the transmission data; a power amplifier for power-amplifying output of the frequency modulator; an antenna for receiving input of a signal outputted from the power amplifier at a regular time period and radiating the inputted signal or receiving reception data; a bandpass filter for bandpass-filtering reception data received from the antenna depending upon the hop frequency; a switch for connecting the antenna with the power amplifier upon transmission and connecting the antenna with the bandpass filter upon reception; a reception frequency mixer for receiving input of the bandpass-filtered reception signal and mixing the received signal with reception frequency corresponding to the hop frequency; an intermediate frequency mixer for receiving output of the reception frequency mixer and mixing the received signal with an intermediate frequency; and a frequency demodulator for receiving output of the intermediate frequency mixer, demodulating frequency, and again inputting the demodulated frequency to the data source.

摘要翻译： 一种适应TDD / FH的无线电通信系统，用于减少干扰信号的干扰，防止第三方的听觉和提高频率使用效率。 无线电通信系统适应时分双工/跳频，具有：用于提供传输数据或接收接收数据的输入的数据源; 用于产生频率变化的跳频发生器，其频率在每个给定时间预设为频率; 频率调制器，用于通过提供传输数据根据与跳频相对应的传输频率调制频率; 功率放大器，用于对频率调制器的输出进行功率放大; 天线，用于以常规时间段接收从功率放大器输出的信号的输入，并且辐射所输入的信号或接收接收数据; 带通滤波器，用于根据跳跃频率对从天线接收的接收数据进行带通滤波; 用于在发送时将天线与功率放大器连接并且在接收时将天线与带通滤波器连接的开关; 接收混频器，用于接收带通滤波的接收信号的输入，并将接收的信号与对应于跳频的接收频率混合; 中频混频器，用于接收接收混频器的输出并将接收的信号与中频进行混频; 以及频率解调器，用于接收中频混频器的输出，解调频率，并再次将解调频率输入到数据源。

公开(公告)号：US5729571A

公开(公告)日：1998-03-17

申请号：US496473

申请日：1995-06-29

申请人： Jong-Hyeon Park ,  Je-Woo Kim

发明人： Jong-Hyeon Park ,  Je-Woo Kim

IPC分类号： H04L25/30 ,  H04B1/7075 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/707

CPC分类号： H04B1/70755 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/70752

摘要： A non-coherent digital receiver of a spread spectrum communication system for baseband synchronizing of a reference pseudo-noise sequence with a received pseudo-noise sequence modulated in a received spread spectrum signal. The digital receiver includes a receiving unit for translating the spread spectrum signal into an in-phase signal and a quadrature-phase signal; a pseudo-noise code generator for generating a reference pseudo-noise code sequence comprising a pseudo-noise early code, a pseudo-noise punctual code, and a pseudo-noise late code; a correlator unit for correlating the in-phase signal and the quadrature-phase signal with the reference pseudo-noise code sequence to produce early, punctual, and late correlation signals comprising in-phase and quadrature-phase components; an adaptive threshold control unit for adaptively generating a variable threshold in response to the pseudo-noise punctual code and the in-phase and quadrature-phase signals; a synchronization detecting and tracking unit for detecting initial synchronization and phase difference between the received pseudo-noise code sequence modulated in the spread spectrum signal and the reference pseudo-noise code sequence for controlling generation of the reference pseudo-noise code sequence and synchronization between the received pseudo-noise code sequence and the reference pseudo-noise code sequence; and a demodulator for demodulating the spread spectrum signal into a baseband signal.

摘要翻译： 扩展频谱通信系统的非相干数字接收机，用于将参考伪噪声序列与在接收的扩频信号中调制的接收的伪噪声序列进行基带同步。 数字接收机包括用于将扩展频谱信号转换为同相信号和正交相位信号的接收单元; 用于产生包括伪噪声早期码，伪噪声准时码和伪噪声延迟码的参考伪噪声码序列的伪噪声码发生器; 相关器单元，用于将同相信号和正交相位信号与参考伪噪声码序列进行相关，以产生包括同相和正交相分量的早期，准时和晚期相关信号; 自适应阈值控制单元，用于响应于伪噪声准时码和同相和正交相位信号自适应地生成可变阈值; 同步检测和跟踪单元，用于检测在扩展频谱信号中调制的接收到的伪噪声码序列与参考伪噪声码序列之间的初始同步和相位差，以用于控制参考伪噪声码序列的产生和 接收伪噪声码序列和参考伪噪声码序列; 以及用于将扩展频谱信号解调为基带信号的解调器。

公开(公告)号：USRE38603E1

公开(公告)日：2004-09-28

申请号：US09492065

申请日：2000-01-27

申请人： Je-Woo Kim ,  Byeong-Ho Lee ,  Jong-Hyeon Park

发明人： Je-Woo Kim ,  Byeong-Ho Lee ,  Jong-Hyeon Park

IPC分类号： H04B169

CPC分类号： H04J13/0048 ,  H04B1/707 ,  H04J13/12

摘要： An improved spread spectrum communication system includes a transmitter and a receiver utilizing a pilot channel for the transmission of pure rather than modulated PN codes for code acquisition or tracking purposes with a lower bit error rate. The pilot signal is used to obtain initial system synchronization and phase tracking of the transmitted spread spectrum signal. At the transmitter side, Walsh an orthogonal code generator, a Walsh modulator, a first PN code generator, a first band spreader, a second band spreader, finite impulse response filters, digital-to-analog converter, low-pass filters, an intermediate frequency mixer, a carrier mixer, a band-pass filter are used to transmit a spread spectrum signal. At the receiver side, a corresponding band-pass filter, a carrier mixer, an intermediate-frequency mixer, low-pass filters, analog-digital converters, a second PN code generator, an I channel despreader, a Q channel despreader, a PN code synchronization controller, a Walsh an orthogonalcode generator, a first Walsh demodulator, a second Walsh demodulator, accumulator & dump circuits, a combiner, and a data decider are used to demodulate a received spread spectrum signal.

公开(公告)号：US06373879B1

公开(公告)日：2002-04-16

申请号：US09224706

申请日：1998-12-31

申请人： Jong-Hyeon Park ,  Je-Woo Kim

发明人： Jong-Hyeon Park ,  Je-Woo Kim

IPC分类号： H04K100

CPC分类号： H04B1/707 ,  H04J13/0003 ,  H04J13/004

摘要： A circuit and process for generating spread signals using orthogonal codes in a DS-CDMA mobile communication system. The process and circuit contemplate the use of a zero-crossing detector for detecting an I-channel signal and a Q-channel signal to generate a zero-crossing detection signal, a delay for phase-delaying the Q-channel signal by 90°, and a multiplexer for outputting one of the Q-channel signal and the phase-delayed signal according to the zero-crossing detection signal. The multiplexer outputs the Q-channel signal to maintain an orthogonality between the I-channel signal and the Q-channel signal, when the zero-crossing is not detected. When the zero-crossing is detected however, the multiplexer phase-delays the Q-channel signal by 90° and outputs the phase-delayed Q-channel signal to maintain a ½ chip offset. Therefore, the device can minimize phase errors, maintaining an orthogonality between the I-channel signal and the Q-channel signal.

摘要翻译： 一种用于在DS-CDMA移动通信系统中使用正交码产生扩展信号的电路和过程。 该过程和电路考虑使用过零检测器来检测I信道信号和Q信道信号以产生过零检测信号，将Q信道信号相位延迟90°的延迟， 以及多路复用器，用于根据过零检测信号输出Q信道信号和相位延迟信号中的一个。 当未检测到过零点时，多路复用器输出Q信道信号以保持I信道信号和Q信道信号之间的正交性。 然而，当检测到过零点时，多路复用器将Q信道信号相位延迟90°，并输出相位延迟的Q信道信号以保持1/2的码片偏移。 因此，器件可以最小化相位误差，保持I信道信号和Q信道信号之间的正交性。

公开(公告)号：US5737361A

公开(公告)日：1998-04-07

申请号：US562282

申请日：1995-11-22

申请人： Jong-Hyeon Park ,  Je-Woo Kim

发明人： Jong-Hyeon Park ,  Je-Woo Kim

IPC分类号： H04B1/06 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/707

CPC分类号： H04B1/7077 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/708

摘要： A receiver of a direct spread spectrum communication system with a window filter implemented to provide a portion of a correlation signal to a window peak detector while the complete correlation signal is being provided to a peak detector. The receiver demodulates data received in the spread spectrum signal by determining phase position information in response to peak detection signals generated by the peak detector and the window peak detector.

摘要翻译： 具有窗口滤波器的直接扩频通信系统的接收机，其被实现为在将完整的相关信号提供给峰值检测器时向窗口峰值检测器提供相关信号的一部分。 接收机通过响应由峰值检测器和窗口峰值检测器产生的峰值检测信号确定相位位置信息来解调在扩频信号中接收的数据。