公开(公告)号：US20050100107A1

公开(公告)日：2005-05-12

申请号：US10706405

申请日：2003-11-12

Applicant: Thomas Head ,  Kaushal Dhar ,  Munawar Kermalli ,  Michael Newell

Inventor： Thomas Head ,  Kaushal Dhar ,  Munawar Kermalli ,  Michael Newell

IPC: H04B1/707 ,  H04K1/10 ,  H04L5/02 ,  H04L5/06 ,  H04L27/26

CPC classification number: H04L27/3411 ,  H04B2201/70706 ,  H04L5/0016 ,  H04L5/06 ,  H04L27/2614

Abstract: A method for reducing the PAR of a composite carrier includes obtaining the in-phase and quadrature components for each of the carriers in the composite carrier, computing vector magnitudes corresponding to each carrier, then adding the vector magnitudes and comparing the resulting sum to a threshold. If the sum exceeds the threshold, at least of the one of the carriers are attenuated, thereby reducing the PAR of the composite carrier. In one embodiment, only the carrier or carriers having significantly larger vectors are attenuated. The pre-calculation and the subsequent attenuation process allows the composite carrier PAR to be reduced to avoid peak regrowth when the carriers are ultimately combined and transmitted.

Abstract translation: 一种用于减少复合载波的PAR的方法包括获得复合载波中每个载波的同相和正交分量，计算对应于每个载波的向量幅值，然后相加向量幅值，并将得到的和与阈值 。 如果总和超过阈值，则载波中的至少一个衰减，从而减少复合载波的PAR。 在一个实施方案中，仅具有显着较大载体的载体或载体被衰减。 预先计算和随后的衰减过程允许复合载波PAR被减小以避免载波最终组合和传输时的峰值再生长。

公开(公告)号：US06885692B2

公开(公告)日：2005-04-26

申请号：US09810596

申请日：2001-03-16

Applicant: Raj Mani Misra ,  Gregory S. Teal

Inventor： Raj Mani Misra ,  Gregory S. Teal

IPC: H04B1/707 ,  H04J13/00 ,  H04J13/10 ,  H04J13/16 ,  H04L27/30

CPC classification number: H04J13/16 ,  H04B1/707 ,  H04B2201/70703 ,  H04B2201/70706 ,  H04J13/0074 ,  H04J13/0077 ,  H04J13/10 ,  H04J13/107

Abstract: A spreading system and method for CDMA applications that requires fewer integer multiplications. User data is spread using real or complex integer based spreading codes of length SF to SFmax chips. At least one of the codes is of the form jn·ν[n] where ν[n] is a spreading code. The invention provides increased user separation using a plurality of spreading codes.

Abstract translation: CDMA应用的扩展系统和方法，需要较少的整数乘法。 使用长度为SF至SF最大码片的实数或复数整数扩展码扩展用户数据。 代码中的至少一个是形式为n，nu [n]的形式，其中nu [n]是扩展码。 本发明使用多个扩展码提供增加的用户分离。

公开(公告)号：US20040258175A1

公开(公告)日：2004-12-23

申请号：US10493396

申请日：2004-04-22

Inventor： Tapio Vuopala ,  Olli Piirainen

IPC: H04L027/04

CPC classification number: H04B1/70755 ,  H04B2201/70706 ,  H04L27/2624 ,  H04L27/366

Abstract: A method for limiting a signal in a radio transmitter comprises giving (302) a signal a limiting threshold, taking (304) at least two samples from the signal for obtaining sample values, adding (306) one or more sample values between the obtained first and at least one subsequent sample values, searching (308) for sample values exceeding the limiting threshold, and if at least one sample value exceeding the limiting threshold is found determining (310) limiting coefficients or reducing coefficients for a predetermined number of sample values by means of the at least one sample value exceeding the limiting threshold, and limiting (312) the signal by one or more determined coefficients.

Abstract translation: 一种用于限制无线电发射机中的信号的方法包括给（302）信号限制阈值，取（304）来自所述信号的至少两个采样以获得采样值，将（306）所获得的第一 以及至少一个随后的采样值，搜索（308）超过限制阈值的采样值，并且如果找到超过限制阈值的至少一个采样值，则确定（310）通过以下方式限定系数或减小预定数量的采样值的系数： 所述至少一个采样值的装置超过所述限制阈值，并且通过一个或多个确定的系数限制（312）所述信号。

公开(公告)号：US20040213351A1

公开(公告)日：2004-10-28

申请号：US10770202

申请日：2004-02-02

Inventor： Steve J. Shattil

IPC: H04K001/10

CPC classification number: H04L27/2614 ,  H04B2201/70706

Abstract: Transmission waveforms are synthesized from orthogonal subcarriers using appropriate combinations of complex sub-carrier codes. This allows conventional single-carrier signaling (such as GSM and CDMA transmission protocols) to be generated and received using a multicarrier platform that is similar to OFDM. Carrier interferometry provides unprecedented bandwidth efficiency and enables substantial improvements in interference rejection, power efficiency, and system versatility.

Abstract translation: 使用复合子载波代码的适当组合从正交子载波合成传输波形。 这允许使用类似于OFDM的多载波平台来生成和接收常规的单载波信令（例如GSM和CDMA传输协议）。 载波干涉测量提供了前所未有的带宽效率，并能够大大提高干扰抑制，功率效率和系统通用性。

公开(公告)号：US20040190600A1

公开(公告)日：2004-09-30

申请号：US10756868

申请日：2004-01-13

Inventor： Joseph P. Odenwalder

IPC: H04B001/69

CPC classification number: H04W52/04 ,  H04B1/707 ,  H04B7/264 ,  H04B2201/70706 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08

Abstract: Method and apparatus for high rate code-division multiple access wireless communication is described. Each of a channel encoded data is modulated by an associated code having a small number of pseudo-noise spreading chips per orthogonal waveform period, thus producing a set of streams of modulated symbols. Each of the set of streams of modulated symbols is then gain adjusted, and combined to yield two streams of combined symbols. The combination is the set of streams is carried out to reduce a peak-to-average ratio of the transmission. The resulting two combined symbol streams are modulated by a complex multiplyer using a user long code and a pseudorandom spreading code (PN code) and upconverted for transmission.

Abstract translation: 描述了用于高速率码分多址无线通信的方法和装置。 信道编码数据中的每一个由每个正交波形周期具有少量伪噪声扩展码片的相关代码进行调制，从而产生一组调制码元流。 然后对调制符号的一组流中的每一个进行增益调整，并组合以产生两个组合符号流。 组合是进行一组流以减少传输的峰均比。 所得到的两个组合符号流由使用用户长码和伪随机扩展码（PN码）的复数乘法器进行调制，并被上变频传输。

公开(公告)号：US06791965B2

公开(公告)日：2004-09-14

申请号：US10272635

申请日：2002-10-17

Applicant: Kazuo Nagatani ,  Yasuyuki Oishi ,  Hidenobu Fukumasa ,  Hajime Hamada ,  Yoshihiko Asano

Inventor： Kazuo Nagatani ,  Yasuyuki Oishi ,  Hidenobu Fukumasa ,  Hajime Hamada ,  Yoshihiko Asano

IPC: H04B7216

CPC classification number: H04J13/00 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04J13/0051 ,  H04J13/12

Abstract: A code multiplexing transmitting apparatus spread-spectrum modulates transmission data of a plurality of channels by spreading codes that differ from one another, combines the spread-spectrum signals of each of the channels and transmits the resultant spread-spectrum modulated signal. A spread-spectrum modulating unit for each channel includes a phase shifter for shifting, by a predetermined angle channel by channel, the phase of a position vector of the spread-spectrum modulated signal of each channel. As the result of such phase control, the phases of pilot signal portions of the spread-spectrum modulated signals of the respective channels are shifted relative to one another so that the peak values of the code-multiplexed signal can be suppressed.

公开(公告)号：US20040141458A1

公开(公告)日：2004-07-22

申请号：US10754803

申请日：2004-01-09

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Sung-Eun Park ,  Jae-Yoel Kim ,  Dae-Kwon Jung

IPC: H04J011/00

CPC classification number: H04L27/2614 ,  H04B2201/70706 ,  H04J13/10

Abstract: An apparatus and method for PAPR reduction in an OFDM system are disclosed. On a transmission side, an information sequence is generated by adding CRC bits to an information bit stream and masked with a plurality of different mask sequences. The masked information sequences are inverse-fast-Fourier-transformed. An IFFT sequence having the lowest PAPR is selected among the IFFT sequences.

Abstract translation: 公开了一种在OFDM系统中减少PAPR的装置和方法。 在发送侧，通过将CRC比特加到信息比特流并用多个不同的掩码序列进行掩码来生成信息序列。 掩蔽的信息序列是快速傅立叶逆变换的。 在IFFT序列中选择具有最低PAPR的IFFT序列。

公开(公告)号：US06678311B2

公开(公告)日：2004-01-13

申请号：US09785925

申请日：2001-02-15

Applicant: Joseph P. Odenwalder

Inventor： Joseph P. Odenwalder

IPC: H04B1707

CPC classification number: H04W52/04 ,  H04B1/707 ,  H04B7/264 ,  H04B2201/70706 ,  H04L1/0057 ,  H04L1/0059 ,  H04L1/0061 ,  H04L1/0071 ,  H04L1/08

Abstract: A method and apparatus for demodulation in high rate CDMA wireless communication is described. In a described high rate CDMA wireless system, a transmitter forms a set of individually gain adjusted subscriber channels using a set of orthogonal subchannel codes having a small number of PN spreading chips per orthogonal waveform period. An illustrative high rate CDMA wireless system uses Walsh codes, each having a duration of fewer than sixty-four chips per orthogonal waveform period. A receiver demodulates each of the subscriber channels using the same orthogonal subchannel codes.

Abstract translation: 描述了用于在高速CDMA无线通信中进行解调的方法和装置。 在所描述的高速率CDMA无线系统中，发射机使用每个正交波形周期具有少量PN扩展码片的一组正交子信道码形成一组单独增益调整的用户信道。 一个说明性的高速CDMA无线系统使用沃尔什码，每个正交波形周期具有少于六十四个码片的持续时间。 接收机使用相同的正交子信道码解调每个用户信道。

公开(公告)号：US20030126545A1

公开(公告)日：2003-07-03

申请号：US09970995

申请日：2001-10-05

Inventor： Alfred Keng Tiong Tan

IPC: H03M013/03

CPC classification number: H04L1/005 ,  H04B1/707 ,  H04B1/7115 ,  H04B2201/70706 ,  H04L1/0041 ,  H04L1/0054 ,  H04L1/006 ,  H04L1/0066

Abstract: A method of channel spread signal coding is provided that enhances error correction coding schemes by further coding error correction coded signals based on a non-linear block error correction coding scheme that introduces a detectable pattern into the signal output prior to transmission. At the receiver end, the detectable pattern may be decorrelated enabling the use of RAKE receivers and enhanced decoding schemes.

Abstract translation: 提供了一种信道扩展信号编码方法，其通过基于在发送之前将可检测图案引入到信号输出中的非线性块误差校正编码方案进一步编码纠错编码信号来增强纠错编码方案。 在接收机端，可检测图案可以是解相关的，使得能够使用RAKE接收机和增强的解码方案。

公开(公告)号：US20030086480A1

公开(公告)日：2003-05-08

申请号：US10284258

申请日：2002-10-31

Applicant: LG Electronics Inc.

Inventor： Won-Hyoung Park ,  Tae-Hyun Kim

IPC: H04B001/707

CPC classification number: H04B1/707 ,  H04B2201/70706

Abstract: A peak cancellation apparatus is included in a base station transmission unit to cancel the peak component of the peak signal. Thus, the base station transmission unit can be implemented with a lower capacity power amplifier. In addition, an existing power amplifier can be replaced with a low-priced power amplifier, so that an expense can be reduced. Moreover, since only the digital signal having the limited PAR is used, the degradation of the signal quality caused in conversion of the digital signal to the analog signal can be prevented. The peak cancellation apparatus includes a peak cancellation unit positioned between a multiplier and a pulse shaping filter or between the pulse shaping filter and a D/A converter and removing a peak component of the peak signal.

Abstract translation: 峰值消除装置包括在基站传输单元中以消除峰值信号的峰值分量。 因此，基站传输单元可以用较低容量的功率放大器来实现。 此外，现有的功率放大器可以用低价功率放大器代替，从而可以降低费用。 此外，由于仅使用具有有限PAR的数字信号，可以防止在将数字信号转换为模拟信号时引起的信号质量的劣化。 峰值消除装置包括位于乘法器和脉冲整形滤波器之间或在脉冲整形滤波器和D / A转换器之间并去除峰值信号的峰值分量的峰值消除单元。