Patent ID: 6816539
Filing Date: 2004-11-09
Classification: G01S,H04B

Abstract:
A device for reception and decoding of a complex radio signal comprising a plurality of radio signals, modulated by pseudo-noise sequences said device comprising:a radio-frequency block, an input of which is connected to a receiving antenna and which transforms a high-frequency input signal to an intermediary frequency signal, an automatic gain control block, an input of which is connected to output of the radio-frequency block, which strengthens a signal of intermediate frequency and which has a control input for-adjustment of an amplification factor, an analog-to-digital converter (ADC), the input of which is connected to an output of the automatic gain control block, which contains not less than three levels of quantization, a multichannel digital corrector, the input of which is connected to a digital output of the analog-to-digital converter, and which comprises a set of identical tracking channels, each of which executes tracking and decoding of one signal from the set of transmitted pseudo-noise signals, digital counters, inputs of which are connected to an output of the ADC, executing count of counts falling within each interval of quantization for a specific period, processor device, joint with a digital correlator and said digital counters by means of a bi-directional data bus, the controlling output of which is connected to a controlling input of an automatic gain control block, which reads out the information from channels of said digital correlator, executes closure of tracking cycles of frequency, phase and code of a pseudo-noise signal and controls the operation of correlation channels and that of the automatic gain control block, wherein the multichannel digital correlator comprises an additional channel for detecting the sinusoidal interference comprising digital generator of carrying frequency, quadrature mixers and accumulators, information from output of accumulators is read out by a processor in which the presence (or absence) of interference is detected and the amplitude is evaluated, so that the processor is controlling the amplification of a signal in the automatic gain control block.