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    • 2. 发明授权
    • Simple encoding/decoding technique for code position modulation
    • 用于码位置调制的简单编码/解码技术
    • US06594317B2
    • 2003-07-15
    • US10029038
    • 2002-04-08
    • Paul E. GordayEdgar H. Callaway, Jr.Neiyer S. Correal
    • Paul E. GordayEdgar H. Callaway, Jr.Neiyer S. Correal
    • H04L2700
    • H04B1/707H04B14/026H04L23/02
    • A method and apparatus for encoding and decoding signals using code position modulation (CPM) in a communication system. The encoding method includes storing an N-chip pseudo-random noise sequence, such as an m-sequence, in a circular shift register and circularly shifting it to obtain a shifted m-sequence. The shifted m-sequence is compared to an m-bit symbol corresponding to the k bit information value. If the shifted m-sequence and the m-symbol match, the shifted m-sequence is output as the N-chip CPM sequence. Alternatively, the m-symbol is used as an initial condition for a pseudo-noise sequence generator. The corresponding decoder stores an N-chip m-sequence in a circular shift register and a correlates shifted version of the m-sequence with a received N-chip CPM sequence. When a peak in the correlation value is detected, an m-bit field is retrieved from the circular shift register and mapped back to a k-bit information value.
    • 一种在通信系统中使用码位置调制(CPM)对信号进行编码和解码的方法和装置。 编码方法包括在圆形移位寄存器中存储诸如m序列的N码片伪随机噪声序列,并循环移位它以获得移位的m序列。 将移位的m序列与对应于k位信息值的m位符号进行比较。 如果移位的m序列和m符号匹配,则移位的m序列作为N码片CPM序列输出。 或者,将m符号用作伪噪声序列发生器的初始条件。 相应的解码器将N-码片m序列存储在循环移位寄存器中,并将m序列的移位版本与接收的N码片CPM序列进行相关。 当检测到相关值中的峰值时,从圆形移位寄存器检索m比特字段并将其映射回到k比特信息值。
    • 3. 发明授权
    • Sync bursts frequency offset compensation
    • 同步突发频偏补偿
    • US07961828B2
    • 2011-06-14
    • US10959359
    • 2004-10-06
    • Edgar H. Callaway, Jr.Paul E. Gorday
    • Edgar H. Callaway, Jr.Paul E. Gorday
    • H04L7/00
    • H04L27/0014H04L2027/0026H04W24/00H04W56/0035
    • A method (500) and system for compensation of frequency offset between a first transceiver (102) and a second transceiver (104) in wireless communication are disclosed. The compensation of the frequency offset between two or more transceivers (102, 104) is achieved by transmitting a set of frequency synchronization bursts. These bursts contain information about the frequency offset. The frequency synchronization bursts are transmitted by the first transceiver at a range of frequencies above and below its carrier frequency (502). When system conditions permit, a subset of the set of frequency synchronization bursts may be transmitted instead of transmitting the full set of frequency synchronization bursts.
    • 公开了一种用于在无线通信中补偿第一收发器(102)和第二收发器(104)之间的频率偏移的方法(500)和系统。 通过发送一组频率同步脉冲串来实现两个或多个收发器(102,104)之间的频率偏移的补偿。 这些突发包含有关频率偏移的信息。 频率同步突发由第一收发器在其载波频率(502)之上和之下的频率范围内传输。 当系统条件允许时,可以发送该组频率同步脉冲串的子集,而不是传送全套频率同步脉冲串。