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    • 3. 发明申请
    • Transmitter and the Method Therefor
    • 发射机及其方法
    • US20100166105A1
    • 2010-07-01
    • US12643042
    • 2009-12-21
    • Jia-Hao WuYun-Yi ShihPang-An TingMing-Che Lin
    • Jia-Hao WuYun-Yi ShihPang-An TingMing-Che Lin
    • H04L27/00
    • H04L27/262
    • A transmitter and the method therefor are provided. The transmitter is applied in an orthogonal frequency division multiplexing (OFDM) based or other multicarrier communication systems. The transmitter uses N sub-carriers. Among the N sub-carriers, L sub-carriers (or tones) are reserved for PAPR reduction. L is less than N. The method includes the following steps. Original frequency domain data symbols are generated and fed into the reserved-tone symbol generation unit. The reserved-tone symbols are generated by using pure frequency domain signal processing. Then the reserved-tone symbols are combined with original data symbols to generate combined PAPR reduction signal. The resultant PAPR reduction signal can be fed into reserved-tone symbol generation unit iteratively to obtain updated reserved-tone symbols. For proper iterations, the original data symbols combined with L frequency domain reserved-tone symbols will result in lower PAPR transmit signal.
    • 提供了一种发射机及其方法。 发射机应用于基于正交频分复用(OFDM)或其他多载波通信系统中。 发射机使用N个子载波。 在N个子载波中,L个子载波(或音调)被保留用于减少PAPR。 L小于N.该方法包括以下步骤。 生成原始频域数据符号并将其馈送到保留音符号生成单元。 通过使用纯频域信号处理产生保留音符号。 然后将保留音符号与原始数据符号组合以产生组合的PAPR减少信号。 所得到的PAPR降低信号可以迭代地馈送到保留音符号生成单元中以获得更新的保留音符号。 对于正确的迭代,与L个频域保留音符号组合的原始数据符号将导致较低的PAPR发送信号。
    • 6. 发明授权
    • Adaptive pilot design for mobile system
    • 移动系统自适应导频设计
    • US07782757B2
    • 2010-08-24
    • US12204422
    • 2008-09-04
    • Lai-Huei WangPang-An TingJia-Hao WuJiun-Yo Lai
    • Lai-Huei WangPang-An TingJia-Hao WuJiun-Yo Lai
    • H04J11/00H04B7/185H04W4/00H03D1/04
    • H04L5/0051H04L5/0007H04L5/006H04L5/0062H04L5/0085H04L25/0216H04L25/0224
    • A method, and device implementing the method, for adaptively allocating pilot signals in a wireless communication system. The method includes receiving channel data, including channel length (L) data, inter-carrier interference power (PICI) data, coherence time (CT) data, and a number of subcarriers (N). The method further includes selecting, when L is greater than a first channel length threshold (LTH1), a first number of pilot signals between a minimum value of L and a maximum number of pilot signals NP,MAX, wherein the first number of pilot signals NP are equally spaced in time according to the CT data, and equally spaced in frequency. Further, the method includes selecting, when L is less than LTH1 and PICI is less than a power threshold (PTH), a second number of pilot signals such that the second number of pilot signals is between the minimum value of L and NP,MAX, wherein the second number of pilot signals are equally spaced in time according to the CT data, and equally spaced in frequency. Finally, the method includes selecting, when L is less than LTH1 and PICI is greater than PTH, a third number of pilot signals such that the third number of pilot signals is equal to n times L (nL), wherein n is an integer, the third number of pilot signals being equally spaced in time according to the CT data, and allocated according to a cluster(n) clustered pilot scheme with a cluster size equal to n, the n-sized clusters being clustered in frequency.
    • 一种实现该方法的方法和装置,用于在无线通信系统中自适应地分配导频信号。 该方法包括接收信道数据,包括信道长度(L)数据,载波间干扰功率(PICI)数据,相干时间(CT)数据和多个副载波(N)。 该方法还包括:当L大于第一信道长度阈值(LTH1)时,选择最小值L和最大数量导频信号NP,MAX之间的第一数量的导频信号,其中第一数量的导频信号 NP根据CT数据在时间上等间隔,频率相等。 此外,该方法包括当L小于LTH1且PICI小于功率阈值(PTH)时选择第二数量的导频信号,使得第二数量的导频信号在L和NP的最小值之间,MAX ,其中所述第二数量的导频信号根据所述CT数据在时间上等间隔,并且频率等间隔。 最后,该方法包括当L小于LTH1且PICI大于PTH时选择第三数量的导频信号,使得第三数量的导频信号等于n倍L(nL),其中n是整数, 第三数量的导频信号根据CT数据在时间上等间隔,并且根据簇大小等于n的簇(n)聚簇导频方案分配,n个大小的簇以频率聚类。
    • 8. 发明申请
    • ADAPTIVE PILOT DESIGN FOR MOBILE SYSTEM
    • 自适应导航设计用于移动系统
    • US20090092194A1
    • 2009-04-09
    • US12204422
    • 2008-09-04
    • Lai-Huei WangPang-An TingJia-Hao WuJiun-Yo Lai
    • Lai-Huei WangPang-An TingJia-Hao WuJiun-Yo Lai
    • H04L27/28
    • H04L5/0051H04L5/0007H04L5/006H04L5/0062H04L5/0085H04L25/0216H04L25/0224
    • A method, and device implementing the method, for adaptively allocating pilot signals in a wireless communication system. The method includes receiving channel data, including channel length (L) data, inter-carrier interference power (PICI) data, coherence time (CT) data, and a number of subcarriers (N). The method further includes selecting, when L is greater than a first channel length threshold (LTH1), a first number of pilot signals between a minimum value of L and a maximum number of pilot signals NP,MAX, wherein the first number of pilot signals NP are equally spaced in time according to the CT data, and equally spaced in frequency. Further, the method includes selecting, when L is less than LTH1 and PICI is less than a power threshold (PTH), a second number of pilot signals such that the second number of pilot signals is between the minimum value of L and NP,MAX, wherein the second number of pilot signals are equally spaced in time according to the CT data, and equally spaced in frequency. Finally, the method includes selecting, when L is less than LTH1 and PICI is greater than PTH, a third number of pilot signals such that the third number of pilot signals is equal to n times L (nL), wherein n is an integer, the third number of pilot signals being equally spaced in time according to the CT data, and allocated according to a cluster(n) clustered pilot scheme with a cluster size equal to n, the n-sized clusters being clustered in frequency.
    • 一种实现该方法的方法和装置,用于在无线通信系统中自适应地分配导频信号。 该方法包括接收信道数据,包括信道长度(L)数据,载波间干扰功率(PICI)数据,相干时间(CT)数据和多个副载波(N)。 该方法还包括:当L大于第一信道长度阈值(LTH1)时,选择最小值L和最大数量导频信号NP,MAX之间的第一数量的导频信号,其中第一数量的导频信号 NP根据CT数据在时间上等间隔,频率相等。 此外,该方法包括当L小于LTH1且PICI小于功率阈值(PTH)时选择第二数量的导频信号,使得第二数量的导频信号在L和NP的最小值之间,MAX ,其中所述第二数量的导频信号根据所述CT数据在时间上等间隔,并且频率等间隔。 最后,该方法包括当L小于LTH1且PICI大于PTH时选择第三数量的导频信号,使得第三数量的导频信号等于n倍L(nL),其中n是整数, 第三数量的导频信号根据CT数据在时间上等间隔,并且根据簇大小等于n的簇(n)聚簇导频方案分配,n个大小的簇以频率聚类。