Automatic gain control method and its apparatus for time-division duplex radio communication system
A technology of automatic gain control, wireless communication system, applied in wireless communication, time division multiplexing system, transmission control/equalization, etc., can solve problems such as inability to obtain synchronization correctly, detector error detection position, etc., to overcome the impact , the effect of occupying less resources and loose timing control
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[0062] A preferred embodiment of the present invention will be described below by taking a TD-SCDMA system (Time Division-Synchronous Code Division Multiple Access system) as an example according to FIG. 3 to FIG. 8 .
[0063] As shown in Figure 3, it is a block flow diagram of the inventive method; the automatic gain control method of a kind of time division duplex wireless communication system provided by the present invention, it comprises the following steps:
[0064] 1. After the start, the user terminal judges whether frame synchronization has been obtained;
[0065] 2. If the frame synchronization is not obtained, the user terminal selects a working frequency point for the received first wireless signal of a frame length, and obtains a suitable initial gain on the frequency point, and proceeds to step 3; if the frame has been obtained synchronization, go directly to step 5;
[0066] 3. On the basis of the initial gain, by calculating the power level change of a second ...
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