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    • 5. 发明申请
    • Integrated burst FSK receiver
    • 集成突发FSK接收机
    • US20050249307A1
    • 2005-11-10
    • US10952171
    • 2004-09-29
    • Tommy YuSteve KrafftSteven JaffeAlan Kwentus
    • Tommy YuSteve KrafftSteven JaffeAlan Kwentus
    • H03D3/00H03D7/16H04L27/00H04L27/10H04L27/233
    • H04L27/2334H03D3/004H03D3/007H03D7/165
    • An integrated burst FSK receiver is provided to receive and interpret an RF signal using FSK modulation. The integrated burst FSK receiver uses a programmable RF local oscillator to mix a received signal down to an IF range or baseband, where it is filtered and sampled for subsequent digital processing. Digital filtering and detection are employed to improve overall bit error rate performance and receiver sensitivity. A programmable digital low-pass or band-pass filter can also be used to suppress interference. A matched filter correlator can be used for detection and symbol timing adjustment in one mode, while an adaptive frequency comparator can be used in another mode. Circuits are provided that estimate carrier offset, frequency deviation and signal strength. These measurements can then be used to optimize the receiver performance. A method for receiving and interpreting an RF signal using FSK modulation is also provided.
    • 提供集成突发FSK接收机,以使用FSK调制来接收和解释RF信号。 集成突发FSK接收机使用可编程RF本地振荡器将接收到的信号混合到IF范围或基带,在其中对其进行滤波和采样以用于随后的数字处理。 采用数字滤波和检测来提高总体误码率性能和接收机灵敏度。 也可以使用可编程数字低通滤波器或带通滤波器来抑制干扰。 匹配滤波器相关器可用于一种模式下的检测和符号定时调整,而自适应频率比较器可用于另一种模式。 提供了估计载波偏移,频率偏差和信号强度的电路。 然后可以使用这些测量来优化接收机性能。 还提供了一种使用FSK调制来接收和解释RF信号的方法。
    • 6. 发明申请
    • Interspersed training for turbo coded modulation
    • turbo编码调制的散布训练
    • US20050060760A1
    • 2005-03-17
    • US10976277
    • 2004-10-28
    • Steven JaffeKelly Cameron
    • Steven JaffeKelly Cameron
    • H04L1/00H04N7/16H04N7/173
    • H04L1/0057H03M13/1515H03M13/2966H04B7/18589H04L1/0041H04L1/0045H04L1/0052H04L1/006H04L1/0065H04L1/0066H04L1/0071H04L1/0083H04L25/0226H04L27/0014H04L2027/0028H04L2027/0034H04L2027/0036
    • A communications system, having a combination Reed-Solomon encoder and a Turbo-Code encoder Data frame configuration which may be changed to accommodate embedded submarkers of known value. The submarkers are embedded in with the data order to aid synchronization in the receiver system, by providing strings of known symbols. The string of known symbols may be the same as the symbols within a training header that appears at the beginning of a data frame. Frame parameters may be tailored to individual users and may be controlled by information pertaining to receivers, such as bit error rate of the receiver. Additional headers may be interspersed within the data in order to assist in receiver synchronization. Frames of data may be acquired quickly by a receiver by having a string of symbols representing the phase offset between successive header symbols in the header training sequence in order to determine the carrier offset. Phase lock to a signal may be achieved after determining carrier offset in receivers by correlating successive symbols in successive headers.
    • 具有Reed-Solomon编码器和Turbo-Code编码器数据帧配置的通信系统,其可以被改变以适应已知值的嵌入式子标记。 通过提供已知符号的字符串,子标记用数据顺序嵌入以辅助接收机系统中的同步。 已知符号串可以与出现在数据帧开始处的训练头中的符号相同。 帧参数可以针对各个用户定制,并且可以由与接收机有关的信息来控制,例如接收机的比特错误率。 额外的头可以散布在数据内,以帮助接收机同步。 为了确定载波偏移,可以由接收机通过在标题训练序列中的连续首标符号之间具有表示相位偏移的符号串来快速获取数据帧。 在确定接收机中的载波偏移之后可以通过将连续的标题中的连续符号相关来来实现对信号的相位锁定。
    • 7. 发明授权
    • Compensation for lane imbalance in a multi-lane analog-to-digital converter (ADC)
    • 多通道模数转换器(ADC)中车道不平衡的补偿
    • US09030341B2
    • 2015-05-12
    • US13553017
    • 2012-07-19
    • Loke TanSteven JaffeHong LiuLin HeRandall PerlowPeter CangianeRamon GomezGiuseppe Cusmai
    • Loke TanSteven JaffeHong LiuLin HeRandall PerlowPeter CangianeRamon GomezGiuseppe Cusmai
    • H03M1/10H03M1/12
    • H03M1/1052H03M1/1215
    • Various multi-lane ADCs are disclosed that substantially compensate for impairments present within various signals that result from various impairments, such as phase offset, amplitude offset, and/or DC offset to provide some examples, such that their respective digital output samples accurately represent their respective analog inputs. Generally, the various multi-lane ADCs determine various statistical relationships, such as various correlations to provide an example, between these various signals and various known calibration signals to quantify the phase offset, amplitude offset, and/or DC offset that may be present within the various signals. The various multi-lane ADCs adjust the various signals to substantially compensate for the phase offset, amplitude offset, and/or DC offset based upon these various statistical relationships such that their respective digital output samples accurately represent their respective analog inputs.
    • 公开了各种多通道ADC,其基本上补偿由各种损伤(例如相位偏移,幅度偏移和/或DC偏移)导致的各种信号内存在的损伤,以提供一些示例,使得它们各自的数字输出样本准确地表示它们 各自的模拟输入。 通常,各种多通道ADC确定各种统计关系,例如各种相关性,以提供这些各种信号之间的示例,以及各种已知的校准信号,以量化可能存在的相位偏移,幅度偏移和/或DC偏移 各种信号。 各种多通道ADC基于这些各种统计关系调整各种信号以基本上补偿相位偏移,幅度偏移和/或DC偏移,使得它们各自的数字输出样本精确地表示它们各自的模拟输入。
    • 9. 发明授权
    • Sample rate reduction in data communication receivers
    • 数据通信接收机采样率降低
    • US07559076B2
    • 2009-07-07
    • US10184770
    • 2002-06-28
    • Tommy YuSteven JaffeStephen Edward Krafft
    • Tommy YuSteven JaffeStephen Edward Krafft
    • H04N5/445
    • H04N21/437H04L27/3881H04N7/173H04N21/2383H04N21/239H04N21/41407H04N21/4382H04N21/6131H04N21/6181
    • Sample rate reduction in data communication receivers. Digital sampling of analog data is performed using a reduced sample rate. The reduction factor may be any number of factors including a factor that divides the sample rate by a factor of two. The reduction of the sampling frequency is from a sampling frequency that is greater than twice the highest frequency component in an analog input signal. These analog input signals may be I and Q streams in certain embodiments. A digital interpolation filter may be employed to increase (up-convert) the sample rate of a digital signal before it is input to a VID filter that is used to recover the transmitted symbols from the over-sampled data stream. In this embodiment, this technique allows a front end of a communication receiver to be clocked at a lower sampling rate without affecting the performance of the VID filter.
    • 数据通信接收机采样率降低。 使用降低的采样率进行模拟数据的数字采样。 减少因子可以是任何数量的因素,包括将采样率除以因子2的因子。 采样频率的降低来自大于模拟输入信号中最高频率分量的两倍的采样频率。 在某些实施例中,这些模拟输入信号可以是I和Q流。 可以采用数字内插滤波器来增加(上转换)数字信号的采样速率,然后再将其输入到用于从过采样数据流中恢复发送符号的VID滤波器。 在该实施例中,该技术允许通信接收器的前端以较低的采样率被计时,而不影响VID滤波器的性能。