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    • 12. 发明授权
    • CDMA receiving apparatus
    • CDMA接收装置
    • US06359875B1
    • 2002-03-19
    • US09084830
    • 1998-05-26
    • Hajime HamadaYasuyuki OishiHidenobu FukumasaKoji Matsuyama
    • Hajime HamadaYasuyuki OishiHidenobu FukumasaKoji Matsuyama
    • H04B7216
    • H04B1/707H04B2201/70707
    • A CDMA receiving apparatus receives a direct sequence CDMA signal produced through QPSK spreading modulation, performs coherent detection of the direct sequence CDMA signal, and despreads the signals, obtained through the coherent detection, through a despreading portion. The despreading portion comprises a selector portion. The selector portion selects signals as a demodulated and despread in-phase output signal and a demodulated and despread quadrature output signal, in accordance with despreading codes, from demodulated in-phase and quadrature signals obtained through the coherent detection, and an inverted in-phase and quadrature signals obtained as a result of the signs of the demodulated in-phase and quadrature signals being inverted.
    • CDMA接收装置接收通过QPSK扩展调制产生的直接序列CDMA信号,执行直接序列CDMA信号的相干检测,并且通过去扩展部分解调通过相干检测获得的信号。 解扩部分包括选择器部分。 选择器部分根据去扩展码从解调的通过相干检测获得的同相和正交信号中选择信号作为解调和去扩展的同相输出信号和解调和去扩展的正交输出信号,以及反相同相 并且作为被解调的同相和正交信号的符号的结果获得的正交信号被反转。
    • 14. 发明申请
    • Receiver Apparatus and Transmitter Apparatus
    • 接收装置和发射机装置
    • US20070263529A1
    • 2007-11-15
    • US11660762
    • 2005-08-08
    • Katsutoshi IshikuraHidenobu Fukumasa
    • Katsutoshi IshikuraHidenobu Fukumasa
    • H04L5/04
    • H04L5/0016H04L1/0057H04L1/0072H04L5/0048H04L5/0053H04L25/0226H04L25/0228
    • In a wireless communication system based on an OFDM technology, a control channel and a low-speed data channel can be multiplexed without a reduction in the transmission speed of a traffic channel. In a communication system that is operated by multiplexing a traffic channel for performing high-speed data transmission and a control channel for performing low-speed control information transmission, an OFDM signal for transmitting the traffic channel and an OFDM signal for transmitting a control signal are multiplexed for transmission. In a receiving station, the control channel is first demodulated/decoded and a judgment is made as to whether or not any signal addressed to the self station is contained in a traffic channel signal. When any signal addressed to the self station is contained, the control channel signal is cancelled from the reception signal in accordance with a wireless channel quality and the traffic channel is demodulated.
    • 在基于OFDM技术的无线通信系统中,可以复用控制信道和低速数据信道,而不会降低业务信道的传输速度。 在通过多路化用于执行高速数据传输的业务信道和用于执行低速控制信息传输的控制信道进行操作的通信系统中,用于发送业务信道的OFDM信号和用于发送控制信号的OFDM信号是 多路传输。 在接收站中,首先对控制信道进行解调/解码,并且判断寻址到自身站的任何信号是否包含在业务信道信号中。 当包含寻址到自站的任何信号时,控制信道信号根据无线信道质量从接收信号中消除,业务信道被解调。