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    • 14. 发明专利
    • Communication terminal apparatus and the spreading code estimation method
    • JP3581356B2
    • 2004-10-27
    • JP2002148286
    • 2002-05-22
    • 松下電器産業株式会社
    • 勝義 中昭彦 西尾
    • H04B1/707H04B1/7105
    • H04B1/712H04B1/7083H04B1/7105H04B1/7117
    • A despreading and RAKE combining section 107 despreads a data portion using all spreading codes and RAKE combines the despread signal, and an average value calculating section 108 calculates average power values (RAKE output average values) of all spreading codes from the RAKE combining result. A threshold setting section 110 uses a minimum value of the RAK output average values by the plurality of spreading codes allocated to the own station as a threshold setting reference value and sets a threshold value at a position lowered by a predetermined width from the reference value. A spreading code determining section 111 performs threshold determination between a RAKE output average value obtained from the spreading codes excepting for the spreading codes allocated to the own station and determines the spreading code, which corresponds to the RAKE output average value exceeding the threshold value, as the spreading code multiplexed into the received signal. A JD operating section 112 performs JD operation using the spreading codes multiplexed into the received signal. This makes it possible to accurately estimate the spreading codes multiplexed into the received signal even when the number of candidates for the number of spreading codes corresponding to one common midamble is multiple.
    • 16. 发明专利
    • Interference removal apparatus and method
    • 干扰去除装置和方法
    • JP2003060517A
    • 2003-02-28
    • JP2001242798
    • 2001-08-09
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • HAYASHI MAKI
    • H04L1/00H04B1/10H04B1/7105H04J13/00H04L1/22H04L25/02H04L25/03
    • H04B1/7105H04B1/1027H04L25/0202H04L25/03006
    • PROBLEM TO BE SOLVED: To improve accuracy in error correction when applying the result of joint detection demodulation to an error correction/decoding system.
      SOLUTION: Path selection sections 105a to 105n cut a signal other than an effective path such as noise from a delay profile, outputs a channel estimation value obtained by selecting only the effective path to a JD demodulation section 106, and outputs the reception level of the effective path to multipliers 108a to 108n. The JD demodulation section 106 performs joint detection operation, and multiplies a matrix operation result by a reception signal outputted from delay equipment 10. A distribution section 107 distributes soft decision data of each user for each user. Error correction/demodulation sections 109a to 109n allow the soft decision data to be subjected to hard decision to obtain the demodulation data of each user.
      COPYRIGHT: (C)2003,JPO
    • 要解决的问题:当将纠错解码系统的联合检测解调结果应用时,提高纠错精度。 解决方案:路径选择部分105a至105n从延迟分布中切除诸如噪声之类的有效路径之外的信号,将通过仅选择有效路径获得的信道估计值输出到JD解调部分106,并输出 到乘法器108a至108n的有效路径。 JD解调单元106进行联合检测动作,并将矩阵运算结果乘以从延迟装置10输出的接收信号。分配单元107分配每个用户的每个用户的软判定数据。 误差校正/解调部分109a至109n允许软判决数据经过硬判决以获得每个用户的解调数据。