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    • 6. 发明申请
    • GAIN CONTROL FOR A RECEIVER IN A MULTI-CARRIER COMMUNICATION SYSTEM
    • 多载波通信系统中接收机的增益控制
    • WO2005109632A1
    • 2005-11-17
    • PCT/US2005/015288
    • 2005-05-03
    • QUALCOMM IncorporatedXIONG, Wei
    • XIONG, Wei
    • H03G3/20
    • H03G3/3068H03G3/001H03G3/3078H04L27/2647H04L27/3809
    • A receiver in an OFDM communication system includes a power detector and a gain controller. The power detector detects for total received power of a received OFDM signal, e.g., by computing the power of the data samples from an ADC and averaging the power. The gain controller adjusts the gain of the receiver in discrete gain steps and in one direction, e.g., from the lowest gain state to the highest gain state, based on the detected total received power. The gain controller initializes the receiver to the lowest gain state. Thereafter, the gain controller detects for low total received power, e.g., by comparing the detected total received power against a predetermined threshold. The gain controller transitions to a higher gain state if low total received power is detected and maintains the current gain state otherwise.
    • OFDM通信系统中的接收机包括功率检测器和增益控制器。 功率检测器例如通过从ADC计算数据样本的功率并对功率求平均,来检测接收到的OFDM信号的总接收功率。 增益控制器基于检测到的总接收功率,以离散增益步长和一个方向(例如,从最低增益状态到最高增益状态)来调整接收机的增益。 增益控制器将接收器初始化为最低增益状态。 此后,增益控制器例如通过将检测到的总接收功率与预定阈值进行比较来检测低总接收功率。 如果检测到低总的接收功率,则增益控制器转换到更高的增益状态,否则保持当前的增益状态。