| 摘要 |
<p>PURPOSE: To prevent noise interference by providing an AGC(automatic gain control) control part, which is connected to outputs of an in-phase (I) and a quadrature phase (Q) sample aligning device and to generate an AGC signal to be connected to a receiving part. CONSTITUTION: A loop of the AGC control part 32, connected to an output of the I and Q sample slinging device 16, provides the AGC signal to a receiver 1F part 13 to set a prescribed percentage outside a threshold cross (T0+D1 and T0-D2). A base band demodulator 20 demodulates I and Q samples from the I and Q sample aligning device 16 to base-band outputs SIN, MI, SQN, MQ which are connected to a spread spectrum signal processor 24. In this case, a minimum AGC is maintained so as to use total gain of a system. Consequently, noise interference is prevented.</p> |
