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    • 2. 发明授权
    • Receiver for an LDPC based TDS-OFDM communication system
    • 用于基于LDPC的TDS-OFDM通信系统的接收机
    • US07724833B2
    • 2010-05-25
    • US11740712
    • 2007-04-26
    • Lin YangDinesh Venkatachalam
    • Lin YangDinesh Venkatachalam
    • H04L27/28
    • H04L27/2647H04L1/0045H04L1/0057H04L25/0202H04L27/2656H04L2025/03414
    • 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.
    • 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。
    • 3. 发明申请
    • Receiver For An LDPC based TDS-OFDM Communication System
    • 用于基于LDPC的TDS-OFDM通信系统的接收机
    • US20080025424A1
    • 2008-01-31
    • US11740712
    • 2007-04-26
    • Lin YangDinesh Venkatachalam
    • Lin YangDinesh Venkatachalam
    • H04B1/69
    • H04L27/2647H04L1/0045H04L1/0057H04L25/0202H04L27/2656H04L2025/03414
    • 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.
    • 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。