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    TRANSMIT POWER ADAPTATION FOR CDMA COMMUNICATION SYSTES USING SUCCESSIVE INTERFERENCE CANCELLATION
    31.
    发明申请
    TRANSMIT POWER ADAPTATION FOR CDMA COMMUNICATION SYSTES USING SUCCESSIVE INTERFERENCE CANCELLATION 失效
    发射功率适配CDMA通信系统使用连续干扰消除

    公开(公告)号：US20050207475A1

    公开(公告)日：2005-09-22

    申请号：US11076751

    申请日：2005-03-10

    申请人： Yeheskel Bar-Ness ,  Ye Lee

    发明人： Yeheskel Bar-Ness ,  Ye Lee

    IPC分类号： H04B1/707 ,  H04B7/005

    CPC分类号： H04B1/71072 ,  H04B2201/70706 ,  H04W52/16 ,  H04W52/248

    摘要： Transmit power adaptation for DS/CDMA systems is disclosed for a CDMA system that utilizes a successive interference cancellation receiver on fading channels. The transmission power is adapted in response to channel variations to achieve an arbitrary power profile for received signal powers at the system base station. That is, the received signal powers are distributed with some factor xi's given as: SRi=SR(l)xi, (i=2,3, . . . , K and xl=1) where K is the number of users and SR(i) is the received signal power of the user having the ith strength, and wherein user strengths are ranked in the order of estimated channel gains. The factor xi gives a measure of the disparity between the received power levels. The channel is estimated at both the transmitter and receiver. In one embodiment, the factors, xi, for distributing the signal powers are selected such that the average BER for each user is minimized. In another embodiment, the factors, xi, for distributing the signal powers are selected such that, after successive interference cancellation, an instantaneous BER for all users is equal.

    摘要翻译： 对于在衰落信道上利用连续干扰消除接收机的CDMA系统，公开了用于DS / CDMA系统的发射功率适配。 传输功率是响应于信道变化而适应的，以实现系统基站处的接收信号功率的任意功率分布。 也就是说，接收的信号功率以给定的一些因子x分配：<？in-line-formula description =“In-line Formulas”end =“lead”？> S < （i = 2，...，i），（i） 3，...，K和x L1 = 1）<？in-line-formula description =“In-line Formulas”end =“tail”？>其中K是用户数， （i）是具有第i个强度的用户的接收信号功率，并且其中用户强度按照 估计渠道收益。 因子x i i给出了接收功率电平之间的差异的度量。 在发射机和接收机两者估计信道。 在一个实施例中，选择用于分配信号功率的因子，使得每个用户的平均BER被最小化。 在另一个实施例中，选择用于分配信号功率的因子，使得在连续干扰消除之后，所有用户的瞬时BER相等。

    Combined frequency-time domain power adaptation for CDMA communication systems
    34.
    发明授权
    Combined frequency-time domain power adaptation for CDMA communication systems 有权
    用于CDMA通信系统的组合频域功率适配

    公开(公告)号：US07483493B2

    公开(公告)日：2009-01-27

    申请号：US11077435

    申请日：2005-03-10

    申请人： Yeheskel Bar-Ness ,  Ye Hoon Lee

    发明人： Yeheskel Bar-Ness ,  Ye Hoon Lee

    IPC分类号： H04L1/02

    CPC分类号： H04W52/42 ,  H04L27/2608

    摘要： Practical transmission power adaptation in multicarrier code division multiple access (MC-CDMA) communications is using either a frequency domain technique or a time domain technique or a combined frequency and time domain technique in response to channel variations. With frequency domain power adaptation, the transmission power is allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers, where the strongest subcarriers are understood to exhibit the highest channel gains. A substantially optimal N′ can be chosen so that the average bit error rate (BER) is minimized. In the time domain power adaptation technique, transmission power is adapted so that the desired signal strength at the receiver output is maintained at a fixed level. In the combined time and frequency domain adaptation technique, the transmission power is first allocated over the N′ (1≦N′≦N) strongest subcarriers rather than over all possible N subcarriers and then it is adapted so that the desired signal strength at the receiver output is maintained at a fixed level.

    摘要翻译： 多载波码分多址（MC-CDMA）通信中的实际发射功率适配采用频域技术或时域技术，或者采用组合频域和时域技术来响应信道变化。 通过频域功率自适应，发射功率分配在N'（1 <= N'<= N）个最强子载波上，而不是在所有可能的N个子载波上分配，其中最强子载波被理解为呈现最高信道增益。 可以选择基本上最佳的N'，使得平均误码率（BER）被最小化。 在时域功率自适应技术中，发射功率被适配成使得接收机输出端的期望信号强度保持在固定的水平。 在组合的时域和频域适应技术中，首先在N'（1 <= N'<= N）个最强子载波上分配发射功率，而不是在所有可能的N个子载波上分配发射功率，然后适配使得所需的信号强度 在接收机输出端保持固定的电平。

    OFDM peak-to-average power ratio reduction by combined symbol rotation and inversion with limited complexity
    35.
    发明授权
    OFDM peak-to-average power ratio reduction by combined symbol rotation and inversion with limited complexity 有权
    通过组合符号旋转和反演减少OFDM峰均功率比，复杂度有限

    公开(公告)号：US07376202B2

    公开(公告)日：2008-05-20

    申请号：US10989895

    申请日：2004-11-16

    申请人： Yeheskel Bar-Ness ,  Mizhou Tan

    发明人： Yeheskel Bar-Ness ,  Mizhou Tan

    IPC分类号： H04K1/02

    CPC分类号： H04L27/2617 ,  H04K1/00 ,  H04L27/2621

    摘要： A signal scrambling method based on combined symbol rotation and inversion (CSRI) for the peak-to-average power ratio (PAPR) reduction of OFDM signals. By dividing OFDM sequences into subblocks and performing symbol rotation and inversion in each subblock, high degrees of freedom are available to offset the possibility of encounting poor sequences with large PAPR. In order to reduce the complexity of this scheme, two suboptimal CSRI schemes are disclosed, one based on a successive approach combined with symbol grouping, and the other based on a random approach combined with threshold control.

    摘要翻译： 基于组合符号旋转和反演（CSRI）的信号加扰方法，用于OFDM信号的峰均功率比（PAPR）降低。 通过将OFDM序列划分为子块并在每个子块中执行符号旋转和反转，可以获得高自由度来抵消具有较大PAPR的差序列的可能性。 为了降低该方案的复杂性，公开了两种次优的CSRI方案，一种是基于与符号分组相结合的连续方法，另一种基于与阈值控制相结合的随机方法。

    STBC MIMO-OFDM peak-to-average power ratio reduction by cross-antenna rotation and inversion
    36.
    发明授权
    STBC MIMO-OFDM peak-to-average power ratio reduction by cross-antenna rotation and inversion 有权
    通过横向天线旋转和反演降低STBC MIMO-OFDM峰值与平均功率比

    公开(公告)号：US07339884B2

    公开(公告)日：2008-03-04

    申请号：US11013934

    申请日：2004-12-16

    申请人： Yeheskel Bar-Ness ,  Mizhou Tan ,  Zoran Latinovic

    发明人： Yeheskel Bar-Ness ,  Mizhou Tan ,  Zoran Latinovic

    IPC分类号： H04J11/00

    CPC分类号： H04L25/03866 ,  H04L1/0625 ,  H04L27/2614 ,  H04L27/3411

    摘要： A signal scrambling method is provided for peak-to-average power ratio (PAPR) reduction of STBC MIMO-OFDM signals in a MIMO-OFDM system having Y transmit antenna. In general terms the OFDM sequence of symbols in said signal for each transmit antenna is divided into M sub-blocks of equal size and subclockwise rotation and inversions are performed across all transmit antennas to generate [2Y]M permuted sequence sets from the original OFDM sequence. Based on a predetermined criteria, there is then selected from the resulting sets of OFDM sequences the one with the best PAPR properties for transmission. The predetermined criteria preferably comprises identifying maximums for all [2Y]M sequence sets, by calculating the largest PAPR value of Y sequences in each set and selecting a set with the minimum maximum for transmission.

    摘要翻译： 提供信号加扰方法，用于具有Y发送天线的MIMO-OFDM系统中的STBC MIMO-OFDM信号的峰均功率比（PAPR）降低。 一般来说，用于每个发射天线的所述信号中的符号的OFDM序列被划分为相同大小的M个子块和亚时基旋转，并且在所有发射天线之间执行反转以产生[2Y] 来自原始OFDM序列的序列集。 基于预定标准，从所得到的OFDM序列组中选择具有最佳PAPR属性的传输序列。 预定标准优选地包括通过计算每组中的Y序列的最大PAPR值并选择具有最小传输最小值的集合来识别所有[2Y]个超级序列集的最大值。

    STBC MIMO-OFDM peak-to-average power ratio reduction by cross-antenna rotation and inversion
    37.
    发明申请
    STBC MIMO-OFDM peak-to-average power ratio reduction by cross-antenna rotation and inversion 有权
    通过横向天线旋转和反演降低STBC MIMO-OFDM峰值与平均功率比

    公开(公告)号：US20060120268A1

    公开(公告)日：2006-06-08

    申请号：US11013934

    申请日：2004-12-16

    申请人： Yeheskel Bar-Ness ,  Mizhou Tan ,  Zoran Latinovic

    发明人： Yeheskel Bar-Ness ,  Mizhou Tan ,  Zoran Latinovic

    IPC分类号： H04J11/00

    CPC分类号： H04L25/03866 ,  H04L1/0625 ,  H04L27/2614 ,  H04L27/3411

    摘要： A signal scrambling method is provided for peak-to-average power ratio (PAPR) reduction of STBC MIMO-OFDM signals in a MIMO-OFDM system having Y transmit antenna. In general terms the OFDM sequence of symbols in said signal for each transmit antenna is divided into M sub-blocks of equal size and subclockwise rotation and inversions are performed across all transmit antennas to generate [2Y]M permuted sequence sets from the original OFDM sequence. Based on a predetermined criteria, there is then selected from the resulting sets of OFDM sequences the one with the best PAPR properties for transmission. The predetermined criteria preferably comprises identifying maximums for all [2Y]M sequence sets, by calculating the largest PAPR value of Y sequences in each set and selecting a set with the minimum maximum for transmission.

    摘要翻译： 提供信号加扰方法，用于具有Y发送天线的MIMO-OFDM系统中的STBC MIMO-OFDM信号的峰均功率比（PAPR）降低。 一般来说，用于每个发射天线的所述信号中的符号的OFDM序列被划分为相同大小的M个子块和亚时基旋转，并且在所有发射天线之间执行反转以产生[2Y] 来自原始OFDM序列的序列集。 基于预定标准，从所得到的OFDM序列组中选择具有最佳PAPR属性的传输序列。 预定标准优选地包括通过计算每组中的Y序列的最大PAPR值并选择具有最小传输最小值的集合来识别所有[2Y]个超级序列集的最大值。

    Wireless mobile station receiver structure with smart antenna
    39.
    发明授权
    Wireless mobile station receiver structure with smart antenna 失效
    无线移动台接收机结构采用智能天线

    公开(公告)号：US6137785A

    公开(公告)日：2000-10-24

    申请号：US42948

    申请日：1998-03-17

    申请人： Yeheskel Bar-Ness

    发明人： Yeheskel Bar-Ness

    IPC分类号： H01Q1/24 ,  H01Q3/26 ,  H04B7/08 ,  H04J3/14

    CPC分类号： H01Q1/241 ,  H01Q3/2611 ,  H04B7/0891

    摘要： This invention relates to a system and method utilizing a receiver architecture with a set of at least two antennae followed by a Rake demodulator at a mobile station for interference cancellation and diversity combining. Such a structure can work well only when the channel vector of desired signal is correctly estimated. The present invention makes use of the identifying spreading codes (as in IS-95 for example) to provide an adaptive channel vector estimate, to thereby cancel cochannel interference and improve the system capacity.

    摘要翻译： 本发明涉及利用具有一组至少两个天线的接收机架构的系统和方法，随后在移动站处用Rake解调器进行干扰消除和分集组合。 只有当正确估计所需信号的信道向量时，这种结构才能正常工作。 本发明利用识别扩展码（例如在IS-95中）来提供自适应信道向量估计，从而消除同信道干扰并提高系统容量。