Method and apparatus for bi-directional power control in a digital
communication system
    1.
    发明授权
    Method and apparatus for bi-directional power control in a digital communication system 失效
    数字通信系统中双向功率控制的方法和装置

    公开(公告)号:US5768684A

    公开(公告)日:1998-06-16

    申请号:US702851

    申请日:1996-08-26

    IPC分类号: H04B7/005 H04B7/185

    CPC分类号: H04W52/20 H04B7/18543

    摘要: In a method and apparatus for maintaining a minimum transmission power level between two communication stations, each station measures the other's received signal quality, and returns an indication of signal quality as part of a regular maintenance burst. Each station adjusts its own transmission power level based on the returned signal quality indication. The signal quality indication is based on the received ratio of bit energy to total noise power spectral density which is calculated from an estimated bit-error-rate.

    摘要翻译: 在用于维持两个通信站之间的最小发射功率电平的方法和装置中,每个站测量另一个接收的信号质量,并且作为常规维护突发的一部分返回信号质量的指示。 每个站基于返回的信号质量指示调整其自身的发射功率电平。 信号质量指示基于从估计的比特误码率计算的比特能量与总噪声功率谱密度的接收比率。

    Transceiver and associated method for surviving fades
    2.
    发明授权
    Transceiver and associated method for surviving fades 失效
    收发器和相关方法,用于存活衰落

    公开(公告)号:US5930268A

    公开(公告)日:1999-07-27

    申请号:US771597

    申请日:1996-12-20

    IPC分类号: H04L7/04 H04B7/26 H04J3/06

    摘要: A time-framed communications transceiver maintains synchronization through fade conditions by resetting a counter (640) whenever new synchronization parameters are stored in a memory (630) based on bursts detected by a receiver (610) and a burst synchronizer (620). A transmitter (690) transmits bursts based upon the synchronization parameters in the memory (630) when the time counter (640) has not exceeded a predetermined period of time. The receiver (610) re-establishes the synchronization parameters in the memory (630) when the time counter exceeds another, longer predetermined period of time before transmission by the transmitter (690).

    摘要翻译: 基于由接收机(610)和突发同步器(620)检测到的突发,每当新的同步参数存储在存储器(630)中时,通过复位计数器(640),时间帧通信收发器通过淡入淡出来维持同步。 当时间计数器(640)尚未超过预定时间段时,发送器(690)基于同步参数在存储器(630)中发送脉冲串。 当时间计数器超过由发射机(690)发射之前的另一较长的预定时间段时,接收器(610)重新建立存储器(630)中的同步参数。

    Soft decision digital communication method and apparatus
    3.
    发明授权
    Soft decision digital communication method and apparatus 失效
    软判决数字通信方法及装置

    公开(公告)号:US5706313A

    公开(公告)日:1998-01-06

    申请号:US332680

    申请日:1994-11-01

    摘要: A decoding apparatus (200) decodes a coherent, differentially encoded multi-level phase shift keying (DEPSK) modulated signal. A coherent receiver (101) receives and, subsequently, outputs the coherent DEPSK modulated signal to a metric computer (201). The metric computer (201) generates a soft decision metric .LAMBDA.(s(n)) corresponding to the coherent DEPSK modulated signal which is outputted to a forward error correction (FEC) decoder (107). The FEC decoder (107) decodes the coherent DEPSK modulated signal in accordance with the soft derision metric .LAMBDA.(s(n)) corresponding to the coherent DEPSK modulated signal.

    摘要翻译: 解码装置(200)对相干,差分编码的多电平相移键控(DEPSK)调制信号进行解码。 相干接收机(101)接收并随后将相干的DEPSK调制信号输出到公制计算机(201)。 度量计算机(201)生成与前向纠错(FEC)解码器(FEC)解码器输出的相干DEPSK调制信号相对应的软判决度量+ E,cir LAMBDA + EE(+ E,ot1 s + EE(n) 107)。 FEC解码器(107)根据与相干DEPSK调制信号相对应的软¡der metric + + ir LAMBDA + EE(s(n))对相干DEPSK调制信号进行解码。