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    • 84. 发明授权
    • Receiver in a spread spectrum communication system having low power analog multipliers and adders
    • 具有低功耗模拟乘法器和加法器的扩频通信系统中的接收机
    • US06278724B1
    • 2001-08-21
    • US09032776
    • 1998-03-06
    • Changming ZhouGuoliang ShouKunihiko SuzukiXuping ZhouXiaoling QinJie ChenMamoru SawahashiFumiyuki Adachi
    • Changming ZhouGuoliang ShouKunihiko SuzukiXuping ZhouXiaoling QinJie ChenMamoru SawahashiFumiyuki Adachi
    • H04L2732
    • H04B1/7113H04B1/7117H04B1/712H04B1/7183
    • A signal reception apparatus in the spread spectrum communication system requires only a small amount of circuitry and consumes a small amount of electric power. A quadrature detector decomposes received signals into in-phase components and quadrature components, and supplies them to a complex-type matched filter. The complex-type matched filter de-spreads the in-phase components and the quadrature components and sends them to a multi-path selector. The multi-path selector selects, from among the received de-spread signals, multiple paths having high levels of signal electric powers and sends the received signals of the selected paths to multiple phase correction blocks. Analog operation circuits calculate phase errors of the received signals of two successive pilot symbol blocks for each path. An analog operation circuit corrects the phases of the received signals of the information symbol block that has been received between the two successive pilot symbol blocks. A rake combiner synchronously combines the phase-corrected de-spread received signals of each path.
    • 扩频通信系统中的信号接收装置仅需要少量的电路并消耗少量的电力。 正交检测器将接收信号分解为同相分量和正交分量,并将其提供给复合型匹配滤波器。 复合型匹配滤波器对同相分量和正交分量进行解扩,并将它们发送到多路径选择器。 多径选择器从接收到的解扩信号中选择具有高电平信号电功率的多个路径,并将所选择的路径的接收信号发送到多个相位校正块。 模拟运算电路计算每个路径的两个连续导频符号块的接收信号的相位误差。 模拟运算电路校正在两个连续的导频符号块之间已经接收到的信息符号块的接收信号的相位。 瑞克组合器同步地组合每个路径的相位校正的去扩展接收信号。
    • 85. 发明授权
    • Complex despreading system
    • 复杂解扩系统
    • US06252899B1
    • 2001-06-26
    • US09055346
    • 1998-04-06
    • Chanming ZhouGuoliang Shou
    • Chanming ZhouGuoliang Shou
    • H04L2730
    • H04B1/7093
    • A compact and easily-assembled circuit for a complex despreading system, arranged such that the circuit does not contain pairs of adders at the output area. The configuration of the circuit enables the addition and subtraction of different signal components to occur before the multiplication stage and not at a pair of adders located at the output area The complex despreader system employs a complex matched filter at a receiver for despreading received signals with a QPSK system in the primary modulation and a BPSK system in the secondary modulation modulated at a transmitter. The input area of each matched filter of I and Q channels includes a pair of adders. One adder generates a first signal having a positive in-phase and a positive quadrature component. The other adder generates a second signal having a negative in-phase component and a positive quadrature component. Next, an I-channel multiplication circuit multiplies both components of the first signal by a spread code then adds the multiplication results together. Likewise, a Q-channel multiplication and addition circuit multiplies the components of the second signal by a spread code and then adds the multiplication results together.
    • 一种用于复杂解扩系统的紧凑且容易组装的电路,其布置成使得该电路在输出区域不包含加法器对。 电路的配置使得不同信号分量的相加和减法在乘法阶段之前发生,而不是在位于输出区的一对加法器处。复数解扩器系统在接收机处采用复匹配滤波器来解扩接收信号 一次调制中的QPSK系统和在发射机调制的二次调制中的BPSK系统。 I和Q通道的每个匹配滤波器的输入区域包括一对加法器。 一个加法器产生具有正同相和正正交分量的第一信号。 另一个加法器产生具有负同相分量和正正交分量的第二信号。 接下来,I信道乘法电路将第一信号的两个分量乘以扩展码,然后将乘法结果相加。 同样,Q信道乘法和加法电路将第二信号的分量乘以扩展码,然后将相乘结果相加。
    • 89. 发明授权
    • .pi./n shift phase-shift keying demodulator
    • pi / n移相移键控解调器
    • US5945875A
    • 1999-08-31
    • US47457
    • 1998-03-25
    • Xuping ZhouGuoliang ShouChangming Zhou
    • Xuping ZhouGuoliang ShouChangming Zhou
    • H04L27/22H04L27/233H03D3/00
    • H04L27/2331
    • A .pi./n shift PSK demodulator of this invention is formed with a digital logical means through the following method. XOR4 calculates the ex-OR operation between the present sample through .pi./4 shift QPSK output from SH2 and the previous one output from SH1. Accumulating 1 among the outputs from XOR4 in the first operation means 5 and multiplying it by .pi./8 obtains the absolute phase difference between the present and the previous symbols. The former or latter four bits from SH1 are subtracted from the corresponding former or latter four bits from SH2, and the result of each bit is summed and its sign is added to the absolute phase data in sign addition means 10. After the phase offset is subtracted from the outputs from 10, it is demodulated into the original one in judgment circuit 13.
    • 本发明的π/ n移位PSK解调器通过以下方法由数字逻辑装置形成。 XOR4通过从SH2输出的pi / 4移位QPSK和SH1的前一个输出来计算当前采样之间的异或运算。 在第一操作装置5中从XOR4的输出中累积1,并将其乘以pi / 8获得当前和先前符号之间的绝对相位差。 来自SH1的前者或后者的四位从SH2的相应的前一个或后四位中减去,每个位的结果被相加,并且其符号被加到符号加法装置10中的绝对相位数据。在相位偏移为 从10的输出中减去,在判断电路13中被解调成原来的。