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1. 发明申请

US20050197064A1 Method and system for using PSK sync word for fine tuning frequency adjustment 有权
标题翻译：使用PSK同步字进行微调频率调整的方法和系统
公开(公告)号：US20050197064A1
公开(公告)日：2005-09-08
申请号：US11101961
申请日：2005-04-08
申请人： Brima Ibrahim , Hea Kim , Henrik Jensen , Siukai Mak
发明人： Brima Ibrahim , Hea Kim , Henrik Jensen , Siukai Mak
IPC分类号： H04L25/06 , H04B7/00 , H04B1/00 , H04B15/00
CPC分类号： H04L25/063 , H04L27/22 , H04L2027/003 , H04L2027/0057 , H04L2027/0095
摘要： In RF transceivers, a method and system for using phase shift key (PSK) sync word for fine tuning frequency adjustment are provided. One aspect of the invention provides for adjusting a local oscillator frequency in a radio frequency (RF) receiver when a residual DC offset remains after a coarse frequency offset adjustment if performed. The fine adjustment may be necessary because of the synchronization required with a PSK-based modulated portion of a Bluetooth packet. A residual phase shift detected in a sync sequence portion of the Bluetooth packet may be utilized to determine a residual or fine frequency adjustment. This approach may allow an RF receiver to operate, in some instances, without the need for an equalizer. In this regard, the power consumed by the RF receiver may be minimized and/or the overall cost of the RF receiver may be reduced.
摘要翻译：在RF收发器中，提供了一种使用相移键（PSK）同步字进行微调频率调整的方法和系统。本发明的一个方面提供了当在执行粗频率偏移调整之后剩余DC偏移保留时，调整射频（RF）接收机中的本地振荡器频率。由于蓝牙分组的基于PSK的调制部分所需的同步，因此可能需要进行微调。在蓝牙分组的同步序列部分中检测到的残余相移可用于确定残差或精细频率调整。这种方法可以允许RF接收机在某些情况下操作，而不需要均衡器。在这方面，RF接收机消耗的功率可以被最小化，和/或可以降低RF接收机的总体成本。

2. 发明申请

US20060093079A1 Method and system for adjusting DC offset slice point in an RF receiver 有权
标题翻译：用于调整RF接收机中DC偏移片段的方法和系统
公开(公告)号：US20060093079A1
公开(公告)日：2006-05-04
申请号：US11102157
申请日：2005-04-08
申请人： Hea Kim , Brima Ibrahim , Henrik Jensen
发明人： Hea Kim , Brima Ibrahim , Henrik Jensen
IPC分类号： H04L27/06 , H04L27/14
CPC分类号： H04L27/142 , H04L25/062
摘要： A method for adjusting a DC offset slice point in an RF receiver is provided and may comprise estimating DC offset using a combination of fast tracking of an input signal and slow tracking of an input signal. If both are used, the fast tracking may be executed prior to executing the slow tracking. The fast tracking may acquire synchronizing signals transmitted before a payload. Additionally, noise tolerance may be increased in the fast tracking and the slow tracking by using tracking envelopes. The fast tracking may average acquisition envelopes and tracking envelopes using a fast tracking weighting factor to a sum of the acquisition envelopes and a slow tracking weighting factor to a sum of the tracking envelopes. Additionally, the slow tracking may average the tracking envelopes.
摘要翻译：提供了一种用于调整RF接收机中的DC偏移切片点的方法，并且可以包括使用输入信号的快速跟踪和输入信号的慢跟踪的组合来估计DC偏移。如果使用两者，则可以在执行慢速跟踪之前执行快速跟踪。快速跟踪可以获取在有效载荷之前传输的同步信号。此外，通过使用跟踪包络，快速跟踪和慢速跟踪可能会增加噪声容限。快速跟踪可以使用快速跟踪加权因子将采集包络和跟踪包络平均为采集包络和缓慢跟踪加权因子之和到跟踪包络的总和。此外，慢速跟踪可以平均跟踪包络。

3. 发明申请

US20060093081A1 Method and system for packet synchronization 有权
公开(公告)号：US20060093081A1
公开(公告)日：2006-05-04
申请号：US11101990
申请日：2005-04-08
申请人： Brima Ibrahim , Hea Kim , Henrik Jensen
发明人： Brima Ibrahim , Hea Kim , Henrik Jensen
IPC分类号： H04L7/00
CPC分类号： H04L7/08
摘要： A method and system for packet synchronization may comprise receiving a plurality of bits from an incoming sample of data. The received plurality of bits may be sliced at a first sampling rate. A logic level of at least one of the received plurality of bits may be determined based on the slicing of the received plurality of bits. The received plurality of bits may be synchronized with a channel access code based on determining the logic level of at least one of the received plurality of bits. The channel access code may be sampled at a higher frequency, to increase the probability of detecting whether the incoming bit is LOGIC 1 or LOGIC 0.

4. 发明申请

US20060093070A1 Method and system for reuse of CORDIC in an RF transceiver by reconfiguration in real time 有权
标题翻译： CORDIC在RF收发器中实时重配置的方法和系统
公开(公告)号：US20060093070A1
公开(公告)日：2006-05-04
申请号：US10989536
申请日：2004-11-16
申请人： Brima Ibrahim , Hea Kim , Henrik Jensen , Paul Lettieri , Siukai Mak
发明人： Brima Ibrahim , Hea Kim , Henrik Jensen , Paul Lettieri , Siukai Mak
IPC分类号： H04L27/22
CPC分类号： H03D3/006
摘要： Methods and systems for processing an RF signal are disclosed herein. Aspects of the method may comprise utilizing a single input CORDIC and a single output CORDIC for synchronizing and demodulating a received signal, wherein the received signal may comprise one or more bit rates. The received signal may comprise a one megabit per second (Mbps) signal. The single input CORDIC may be configured to operate in a rotating mode and the single output CORDIC may be configured to operate in a rotating mode and/or an arctangent (ARCTAN) mode. A rotated output of the single input CORDIC may be correlated with a phase shift keying (PSK) synchronization (sync) word and a portion of the correlated rotated output of the single input CORDIC may be buffered.
摘要翻译：本文公开了用于处理RF信号的方法和系统。该方法的方面可以包括利用单个输入CORDIC和单个输出CORDIC来同步和解调所接收的信号，其中所接收的信号可以包括一个或多个比特率。所接收的信号可以包括一兆兆比特每秒（Mbps）信号。单输入CORDIC可以被配置为以旋转模式操作，并且单输出CORDIC可以被配置为在旋转模式和/或反正切（ARCTAN）模式下操作。单输入CORDIC的旋转输出可以与相移键控（PSK）同步（sync）字相关，并且单个输入CORDIC的相关旋转输出的一部分可以被缓冲。

5. 发明申请

US20050181729A1 Method and system for frequency feedback adjustment in digital receivers 有权
标题翻译：数字接收机频率反馈调整方法及系统
公开(公告)号：US20050181729A1
公开(公告)日：2005-08-18
申请号：US11102123
申请日：2005-04-08
申请人： Brima Ibrahim , Hea Kim , Henrik Jensen
发明人： Brima Ibrahim , Hea Kim , Henrik Jensen
IPC分类号： H04L25/06 , H04B7/00 , H04B17/00 , H04M1/00
CPC分类号： H03J7/02 , H03J2200/02 , H04L25/063 , H04L27/142 , H04L2027/0057 , H04L2027/0065
摘要： In RF transceivers, a method and a system for a frequency feedback adjustment in digital receivers are provided. A DC offset may result from the difference in frequencies between an RF transmitter and an RF receiver. An adjustment of the receiver's frequency may be implemented after synchronization occurs and may be performed by utilizing the Forward Error Correction (FEC) repetition rate in a header of a Bluetooth packet. The adjustment may be performed when the frequency difference exceeds a threshold value. In another aspect, adjusting the frequency of the RF receiver may be performed by modifying and/or changing a phase locked loop (PLL) trimmer register. This approach may allow an RF receiver to operate, in some instances, without the need for an equalizer. In this regard, the power consumed by the RF receiver may be minimized and/or the overall cost of the RF receiver may be reduced.
摘要翻译：在RF收发器中，提供了用于数字接收机中的频率反馈调整的方法和系统。 DC偏移可能由RF发射机和RF接收机之间的频率差引起。可以在同步发生之后实现接收机频率的调整，并且可以通过利用蓝牙分组的报头中的前向纠错（FEC）重复率来执行。当频率差超过阈值时，可以进行调整。在另一方面，可以通过修改和/或改变锁相环（PLL）微调寄存器来调整RF接收机的频率。这种方法可以允许RF接收机在某些情况下操作，而不需要均衡器。在这方面，RF接收机消耗的功率可以被最小化，和/或可以降低RF接收机的总体成本。

6. 发明申请

US20060270449A1 Method and system for a radio data system (RDS) demodulator for a single chip integrated bluetooth and frequency modulation (FM) transceiver and baseband processor 有权
标题翻译：用于单芯片集成蓝牙和调频（FM）收发器和基带处理器的无线电数据系统（RDS）解调器的方法和系统
公开(公告)号：US20060270449A1
公开(公告)日：2006-11-30
申请号：US11287075
申请日：2005-11-22
申请人： Hea Kim , Brima Ibrahim
发明人： Hea Kim , Brima Ibrahim
IPC分类号： H04M1/00
CPC分类号： H04H40/18 , H04B1/034 , H04B1/207 , Y02D70/14
摘要： Aspects of a method and system for a radio data service (RDS) demodulator for a single chip integrated Bluetooth and frequency modulation (FM) transceiver and baseband processor are presented. Aspects of the system may include circuitry on a single chip that enables demodulation of an RDS signal, filtering of the RDS signal, and detection of binary bits in the filtered RDS signal. The filtered RDS signal may be generated by filtering the RDS signal based on a raised cosine filter, or a doublet filter. In general, the RDS signal may also be filtered by a filter that is a first, or greater derivative of a Gaussian filter in either the time or frequency domain. Aspects of the method may include demodulating the RDS signal, filtering the RDS signal, and detecting binary bits in the filtered RDS signal.
摘要翻译：提出了用于单芯片集成蓝牙和频率调制（FM）收发器和基带处理器的无线电数据服务（RDS）解调器的方法和系统的方面。该系统的方面可以包括能够解调RDS信号，对RDS信号进行滤波以及检测经滤波的RDS信号中的二进制位的单个芯片上的电路。可以通过基于升余弦滤波器或双滤波器对RDS信号进行滤波来生成经滤波的RDS信号。通常，RDS信号也可以由滤波器滤波，滤波器是时域或频域中的高斯滤波器的第一或更大的导数。该方法的方面可以包括解调RDS信号，滤波RDS信号，以及检测经滤波的RDS信号中的二进制位。

7. 发明申请

US20060133291A1 Method and system for determining a signal quality metric in event of a CRC false positive 有权
标题翻译：在CRC假阳性的情况下确定信号质量度量的方法和系统
公开(公告)号：US20060133291A1
公开(公告)日：2006-06-22
申请号：US11093388
申请日：2005-03-30
申请人： Hea Kim , Paul Lettieri , Brima Ibrahim , Siukai Mak
发明人： Hea Kim , Paul Lettieri , Brima Ibrahim , Siukai Mak
IPC分类号： C12P21/06
CPC分类号： H04L1/0061 , H04L1/206
摘要： Certain aspects of determining a signal quality metric in event of a CRC false positive may comprise measuring an amplitude and/or phase of at least a portion of a phase shift keyed section of a frame. The measured amplitude and/or phase may be checked to determine if it lies within a range of a reference amplitude and/or phase respectively. An amplitude and/or phase counter may be incremented if the measured amplitude and/or phase lies outside the range of the reference amplitude and/or phase respectively. A confidence level value of a cyclic redundancy check (CRC) for at least a portion of the phase shift keyed section of the frame may be determined based on a determined value of the incremented amplitude and/or phase counter.
摘要翻译：在CRC假阳性的情况下确定信号质量度量的某些方面可以包括测量帧的相移键控部分的至少一部分的幅度和/或相位。可以检查测量的幅度和/或相位以确定其是否位于参考幅度和/或相位的范围内。如果测量的幅度和/或相位分别在参考幅度和/或相位的范围之外，幅度和/或相位计数器可以增加。可以基于增加的幅度和/或相位计数器的确定值来确定帧的相移键控部分的至少一部分的循环冗余校验（CRC）的置信水平值。

8. 发明申请

US20060269004A1 Method and system for digital spur cancellation 有权
标题翻译：数字支线取消方法和系统
公开(公告)号：US20060269004A1
公开(公告)日：2006-11-30
申请号：US11286947
申请日：2005-11-22
申请人： Brima Ibrahim , Hea Kim , Bojko Marholey
发明人： Brima Ibrahim , Hea Kim , Bojko Marholey
IPC分类号： H04K1/10
CPC分类号： H04L25/03159 , H04L27/14 , H04L27/34 , Y02D70/14
摘要： A method and system for digital spur cancellation may include removing a spur in a left channel minus right channel (L−R) baseband signal generated from a FM signal. The L−R baseband signal may be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. An orthogonal signal may also be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. The phase of the orthogonal signal may be further adjusted to introduce a substantially −90° phase shift to spurs at a specific frequency. Accordingly, the spurs in the L−R baseband signal may be cancelled when the first L−R baseband signal is combined with the phase adjusted orthogonal signal.
摘要翻译：用于数字支线消除的方法和系统可以包括去除左声道中的杂音减去从FM信号产生的右声道（L-R）基带信号。可以通过使用CORDIC算法在从FM信号解调的信号中解调副载波来生成L-R基带信号。也可以通过使用CORDIC算法在从FM信号解调的信号中解调副载波来产生正交信号。可以进一步调整正交信号的相位以便以特定频率引入基本上-90°的相移来刺激。因此，当第一L-R基带信号与相位调整的正交信号组合时，可以消除L-R基带信号中的杂散。

9. 发明申请

US20050189951A1 Filter calibration 有权
标题翻译：过滤器校准
公开(公告)号：US20050189951A1
公开(公告)日：2005-09-01
申请号：US11120608
申请日：2005-05-03
申请人： Brima Ibrahim , Hea Kim
发明人： Brima Ibrahim , Hea Kim
IPC分类号： G01R27/28 , H03H7/01 , H03H11/12
CPC分类号： H03H7/0153 , H03H11/1291
摘要： A method for calibrating a filter begins with the filter filtering a first signal having a first frequency to produce a first filtered signal, wherein the first frequency is in a known pass region of the filter. The processing continues by measuring signal strength of the first filtered signal to produce a first measured signal strength. The processing continues with the filter filtering a second signal having a second frequency to produce a second filtered signal, wherein the second frequency is at a desired corner frequency of the filter. The processing continues by measuring signal strength of the second filtered signal to produce a second measured signal strength. The processing continues by comparing the first measured signal strength with the second measured signal strength to determine whether the filter has attenuated the second signal by a desired attenuation value with respect to the first signal. The processing continues by adjusting filter response of the filter to produce an adjusted filter response when the filter has not attenuated the second signal by the desired attenuation value with respect to the first signal.
摘要翻译：用于校准滤波器的方法开始于对具有第一频率的第一信号进行滤波以产生第一滤波信号，其中第一频率在滤波器的已知通过区域中。通过测量第一滤波信号的信号强度以产生第一测量信号强度，继续处理。处理继续，滤波器对具有第二频率的第二信号进行滤波以产生第二滤波信号，其中第二频率处于滤波器的期望转角频率。该处理通过测量第二滤波信号的信号强度继续，以产生第二测量信号强度。该处理通过将第一测量信号强度与第二测量信号强度进行比较来确定滤波器是否已经相对于第一信号衰减了所需的衰减值来衰减第二信号。当滤波器没有相对于第一信号衰减所需的衰减值时，滤波器的滤波器响应通过调节滤波器的滤波器响应来产生调整的滤波器响应，从而继续该处理。

10. 发明申请

US20050136873A1 Phase locked loop calibration 失效
标题翻译：锁相环校准
公开(公告)号：US20050136873A1
公开(公告)日：2005-06-23
申请号：US10742489
申请日：2003-12-19
申请人： Hea Kim , Brima Ibrahim
发明人： Hea Kim , Brima Ibrahim
IPC分类号： H03L7/089 , H04B17/00 , H04B1/18 , H04B1/40
CPC分类号： H03L7/0891 , H03L2207/06
摘要： A method for calibrating a phase locked loop (PLL) includes an open loop test and a closed loop test. The open loop test includes providing an optimal control input to a controlled oscillator (CO) of the PLL; determining rate of output oscillation of the CO based on the optimal control input; comparing the rate of the output oscillation with rate of an optimal output oscillation; and when the comparing the rate of the output oscillation with rate of the optimal output oscillation is unfavorable, adjusting an oscillation point of the CO until the comparing is favorable to produce an open-loop adjusted CO oscillation point. The close loop test includes determining a closed-loop input control level of the CO at the open-loop adjusted CO oscillation point; comparing the closed-loop input control level with the optimal control input; and when the comparing the closed-loop input control level with the optimal control input is not favorable, adjusting the open-loop adjusted CO oscillation point until the comparing is favorable.
摘要翻译：用于校准锁相环（PLL）的方法包括开环测试和闭环测试。开环测试包括为PLL的受控振荡器（CO）提供最佳控制输入; 基于最优控制输入确定CO的输出振荡速率; 将输出振荡速率与最佳输出振荡速率进行比较; 当比较输出振荡的速率与最佳输出振荡的速率不利时，调整CO的振荡点直到比较有利于产生开环调整的CO振荡点。闭环测试包括确定开环调整的CO振荡点处的CO的闭环输入控制电平; 将闭环输入控制电平与最优控制输入进行比较; 并且当将闭环输入控制电平与最佳控制输入进行比较时，调整开环调整的CO振荡点直到比较有利。

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