Gain control method for a receiver of signals transmitted in bursts and receiver exploiting it

摘要

The method is applicable to a receiver ( 1 ) of signals corresponding to packets of digital data transmitted in bursts, which comprises an analogue pickup subassembly ( 3 ) connected to a digital processing subassembly ( 8 ) by means for converting analogue signals into digital signals ( 7 ). Gain adjustment means ( 5 ) act on the amplification means ( 5 ) in order to alter the power of signals supplied to the conversion means. The method provides a preadjustment of the gain, in the absence of a burst, for detecting the arrival of signals even if they are weak, and an adjustment of the gain as a function of a power value of the signal determined from burst start symbols, as obtained after conversion. This adjustment is dependent on the recognition of symbols scheduled at the start of a burst, it is carried out during a time scheduled for a symbol otherwise left unexploited by the method.