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    METHOD AND DEVICE FOR FREQUENCY DOMAIN COMPENSATION FOR CHANNEL ESTIMATION AT AN OVER SAMPLING RATE IN A TDS_OFDM RECEIVER
    1.
    发明申请
    METHOD AND DEVICE FOR FREQUENCY DOMAIN COMPENSATION FOR CHANNEL ESTIMATION AT AN OVER SAMPLING RATE IN A TDS_OFDM RECEIVER 审中-公开
    用于在TDS_OFDM接收器中采样速率进行频域估计的频域补偿的方法和设备

    公开(公告)号：US20080025377A1

    公开(公告)日：2008-01-31

    申请号：US11550316

    申请日：2006-10-17

    申请人： QIN LIU ,  Dinesh Venkatachalam

    发明人： QIN LIU ,  Dinesh Venkatachalam

    IPC分类号： H04B1/00

    CPC分类号： H04L25/0234 ,  H04L27/2647 ,  H04L27/2656 ,  H04L2025/03414

    摘要： In a TDS-OFDM receiver a device for frequency-domain compensation for channel estimation at an over-sampling rate is provided. The device includes a correlater for correlating a first signal and a second signal; a transformer for transforming the correlated signals into a frequency domain; and an interpolater and truncater block for interpolating and truncating the transformed signal to have the interpolated and truncated, transformed signal as a reference for future use.

    摘要翻译： 在TDS-OFDM接收机中，提供用于以过采样速率进行信道估计的频域补偿的装置。 该装置包括用于使第一信号和第二信号相关的相关器; 用于将相关信号变换成频域的变压器; 以及用于内插和截断经变换的信号以使内插和截断的变换信号作为将来使用的参考的内插器和截取器块。

    METHOD FOR CHANNEL ESTIMATION
    2.
    发明申请
    METHOD FOR CHANNEL ESTIMATION 审中-公开
    信道估计方法

    公开(公告)号：US20080025418A1

    公开(公告)日：2008-01-31

    申请号：US11550358

    申请日：2006-10-17

    申请人： QIN LIU ,  Dinesh Venkatachalam

    发明人： QIN LIU ,  Dinesh Venkatachalam

    IPC分类号： H04K1/10 ,  H04L27/06

    CPC分类号： H04L25/0212 ,  H04L1/0045 ,  H04L1/0057 ,  H04L25/03159 ,  H04L27/2605

    摘要： A channel estimation using the received PN (pseudo-noise) sequence associated with a received frame among a plurality of associated, neighboring frames. The estimation using a value associated with a point of a currently frame as a denominator in a predetermined formula. If the value is smaller than its corresponding value in a neighboring frame, the neighboring frame's corresponding value is used instead of the value of the current frame.

    摘要翻译： 使用与多个相关联的相邻帧中的接收帧相关联的接收PN（伪噪声）序列的信道估计。 使用与当前帧的点相关联的值作为预定公式中的分母的估计。 如果该值小于相邻帧中的对应值，则使用相邻帧的对应值而不是当前帧的值。

    METHOD AND APPARATUS FOR FREQUENCY DOMAIN EXUALIZATION BASED UPON A DECISION FEEDBACK IN A TDS-OFDM RECEIVER
    3.
    发明申请
    METHOD AND APPARATUS FOR FREQUENCY DOMAIN EXUALIZATION BASED UPON A DECISION FEEDBACK IN A TDS-OFDM RECEIVER 审中-公开
    基于TDS-OFDM接收机中的决策反馈的频域实现的方法和装置

    公开(公告)号：US20080025384A1

    公开(公告)日：2008-01-31

    申请号：US11550342

    申请日：2006-10-17

    申请人： Qin Liu ,  Dinesh Venkatachalam

    发明人： Qin Liu ,  Dinesh Venkatachalam

    IPC分类号： H03H7/30 ,  H04K1/10 ,  H04L27/06

    CPC分类号： H04L25/03159 ,  H04L7/0029 ,  H04L7/04 ,  H04L25/0212 ,  H04L27/2605

    摘要： A device for equalization adapted for receiving a symbol and a channel frequency response is provided. The device includes a slicer for delimiting the channel frequency response to a sliced channel frequency response based upon a signal constellation; and a divider for dividing the received symbol using the sliced channel frequency response as the divider, with a resultant quotient of the divider as a reference point for future received symbols.

    摘要翻译： 提供一种用于均衡的装置，用于接收符号和信道频率响应。 所述设备包括限幅器，用于基于信号星座将所述信道频率响应定界为限幅信道频率响应; 以及用于使用分片信道频率响应分割接收到的符号作为分频器的除法器，分频器的合成商作为未来接收符号的参考点。

    Receiver for an LDPC based TDS-OFDM communication system
    4.
    发明授权
    Receiver for an LDPC based TDS-OFDM communication system 失效
    用于基于LDPC的TDS-OFDM通信系统的接收机

    公开(公告)号：US07724833B2

    公开(公告)日：2010-05-25

    申请号：US11740712

    申请日：2007-04-26

    申请人： Lin Yang ,  Dinesh Venkatachalam

    发明人： Lin Yang ,  Dinesh Venkatachalam

    IPC分类号： H04L27/28

    CPC分类号： H04L27/2647 ,  H04L1/0045 ,  H04L1/0057 ,  H04L25/0202 ,  H04L27/2656 ,  H04L2025/03414

    摘要： An LDPC based TDS-OFDM receiver for demodulating an LDPC encoded TDS-OFDM modulated RF signal downconverted to an IF signal includes a synchronization block, an equalization block, an OFDM demodulation block and a FEC decoder block. The synchronization block generates a baseband signal from a digitized IF signal and performs correlation of a PN sequence in a signal frame of the received RF signal with a corresponding locally generated PN sequence to provide signals for performing carrier recovery, timing recovery and parameters for channel estimation. The equalization block performs channel estimation and channel equalization. The OFDM demodulation block performs demodulation on the baseband signal to recover OFDM symbols and converts the OFDM symbols to frequency domain. The FEC decoder block includes an LDPC decoder for decoding the OFDM symbols based on the LDPC code to generate a digital output signal indicative of the data content of the RF signal.

    摘要翻译： 用于解调下变频到IF信号的LDPC编码的TDS-OFDM调制RF信号的基于LDPC的TDS-OFDM接收机包括同步块，均衡块，OFDM解调块和FEC解码器块。 同步块从数字化IF信号产生基带信号，并且执行接收的RF信号的信号帧中的PN序列与相应的本地生成的PN序列的相关性，以提供用于执行载波恢复，定时恢复和用于信道估计的参数的信号 。 均衡块执行信道估计和信道均衡。 OFDM解调块对基带信号进行解调以恢复OFDM符号，并将OFDM符号转换为频域。 FEC解码器块包括LDPC解码器，用于基于LDPC码解码OFDM符号，以产生指示RF信号的数据内容的数字输出信号。

    RECEIVER ARCHITECTURE HAVING A LDPC DECODER WITH AN IMPROVED LLR UPDATE METHOD FOR MEMORY REDUCTION
    6.
    发明申请
    RECEIVER ARCHITECTURE HAVING A LDPC DECODER WITH AN IMPROVED LLR UPDATE METHOD FOR MEMORY REDUCTION 审中-公开
    具有用于减少存储器的改进的LLR更新方法的LDPC解码器的接收机架构

    公开(公告)号：US20080028282A1

    公开(公告)日：2008-01-31

    申请号：US11557491

    申请日：2006-11-07

    申请人： Yan Zhong ,  Abhiram Prabhakar ,  Dinesh Venkatachalam

    发明人： Yan Zhong ,  Abhiram Prabhakar ,  Dinesh Venkatachalam

    IPC分类号： H03M13/03

    CPC分类号： H03M13/116 ,  H03M13/1102 ,  H03M13/1114 ,  H03M13/1117 ,  H03M13/1122 ,  H03M13/114 ,  H03M13/152 ,  H03M13/251 ,  H03M13/2732 ,  H03M13/2906 ,  H03M13/6505

    摘要： The present invention provides a reduced memory implementation for the min-sum algorithm compared to traditional hardware implementations. The improvement includes innovative MIN_SUM method with reduced memory requirements suitable of computer implementation that combines the traditional row update process and column update process into a single process, in that the traditional CNU unit and VNU unit are combined into a single CVNU unit. The improvement not only reduces the time required for decoding by half, but also reduces the logic and routing efforts. Furthermore, instead of storing the whole intermediate LLR values using a significant number of memories, only a set of parameters associated with the intermediate LLR values is stored. The set of parameters includes: 1. sign of LLR; 2. the minimum LLR, 3. sub-minimum LLR, and 4. the column location of minimum value in each row. Therefore, as compared with the traditional LDPC decoder implementation, the required memory size of the present invention is significantly or tremendously reduced.

    摘要翻译： 与传统硬件实现相比，本发明提供了用于最小和算法的减少的存储器实现。 该改进包括创新的MIN_SUM方法，具有较少的内存要求，适合计算机实现，将传统的行更新过程和列更新过程组合到一个过程中，传统的CNU单元和VNU单元组合成一个CVNU单元。 该改进不仅将解码所需的时间缩短了一半，而且减少了逻辑和布线工作。 此外，代替使用大量存储器存储整个中间LLR值，仅存储与中间LLR值相关联的一组参数。 参数集包括：1. LLR的符号; 2.最小LLR，3. sub-minimum LLR和4.每行最小值的列位置。 因此，与传统的LDPC解码器实现相比，本发明所需的存储器大小显着或大大降低。

    UNIFIED RECEIVER STRUCTURE FOR TDS-OFDM SIGNALS AND TDS SINGLE CARRIER SIGNALS
    7.
    发明申请
    UNIFIED RECEIVER STRUCTURE FOR TDS-OFDM SIGNALS AND TDS SINGLE CARRIER SIGNALS 审中-公开
    用于TDS-OFDM信号和TDS单载波信号的统一接收机结构

    公开(公告)号：US20080025419A1

    公开(公告)日：2008-01-31

    申请号：US11550377

    申请日：2006-10-17

    申请人： Lin Yang ,  Dinesh Venkatachalam

    发明人： Lin Yang ,  Dinesh Venkatachalam

    IPC分类号： H04K1/10

    CPC分类号： H04L27/0008 ,  H04L25/0202 ,  H04L27/2647 ,  H04L27/2656 ,  H04L2025/03414

    摘要： A receiver adapted to receive both OFDM signals and single carrier signals is provided. The receiver possesses substantially commonly shared circuitry or function blocks, except an IFT (inverse Fourier transform) block adapted a receive frequency domain signals from a channel equalizer for converting the received frequency domain signal to a time domain signal, and a bypass for bypassing the IFT.

    摘要翻译： 提供了适于接收OFDM信号和单载波信号的接收机。 接收机具有基本上共同的共享电路或功能块，除了适用于来自信道均衡器的接收频域信号的IFT（逆傅里叶变换）块，用于将接收到的频域信号转换为时域信号，旁路用于绕过IFT 。

    Receiver For An LDPC based TDS-OFDM Communication System
    8.
    发明申请
    Receiver For An LDPC based TDS-OFDM Communication System 失效
    用于基于LDPC的TDS-OFDM通信系统的接收机

    公开(公告)号：US20080025424A1

    公开(公告)日：2008-01-31

    申请号：US11740712

    申请日：2007-04-26

    申请人： Lin Yang ,  Dinesh Venkatachalam

    发明人： Lin Yang ,  Dinesh Venkatachalam

    IPC分类号： H04B1/69

    CPC分类号： H04L27/2647 ,  H04L1/0045 ,  H04L1/0057 ,  H04L25/0202 ,  H04L27/2656 ,  H04L2025/03414

    摘要： An LDPC based TDS-OFDM receiver for demodulating an LDPC encoded TDS-OFDM modulated RF signal downconverted to an IF signal includes a synchronization block, an equalization block, an OFDM demodulation block and a FEC decoder block. The synchronization block generates a baseband signal from a digitized IF signal and performs correlation of a PN sequence in a signal frame of the received RF signal with a corresponding locally generated PN sequence to provide signals for performing carrier recovery, timing recovery and parameters for channel estimation. The equalization block performs channel estimation and channel equalization. The OFDM demodulation block performs demodulation on the baseband signal to recover OFDM symbols and converts the OFDM symbols to frequency domain. The FEC decoder block includes an LDPC decoder for decoding the OFDM symbols based on the LDPC code to generate a digital output signal indicative of the data content of the RF signal.

    摘要翻译： 用于解调下变频到IF信号的LDPC编码的TDS-OFDM调制RF信号的基于LDPC的TDS-OFDM接收机包括同步块，均衡块，OFDM解调块和FEC解码器块。 同步块从数字化IF信号产生基带信号，并且执行接收的RF信号的信号帧中的PN序列与相应的本地生成的PN序列的相关性，以提供用于执行载波恢复，定时恢复和用于信道估计的参数的信号 。 均衡块执行信道估计和信道均衡。 OFDM解调块对基带信号进行解调以恢复OFDM符号，并将OFDM符号转换为频域。 FEC解码器块包括LDPC解码器，用于基于LDPC码解码OFDM符号，以产生指示RF信号的数据内容的数字输出信号。