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Combiner of intermediate frequency signals to minimize the bit error rate in a radio receiver based on the space or angular multipath method
Combiner of intermediate frequency signals to minimize the bit error rate in a radio receiver based on the space or angular multipath method
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机译:基于空间或角度多径方法的中频信号组合器,以最小化无线电接收机中的误码率
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PCT No. PCT/EP93/02758 Sec. 371 Date Jun. 5, 1995 Sec. 102(e) Date Jun. 5, 1995 PCT Filed Oct. 8, 1993 PCT Pub. No. WO94/09573 PCT Pub. Date Apr. 28, 1994A mixed combination strategy combiner for receivers operating in high capacity digital radio links and protected with space or angle diversity is described. The combiner comprises a system which calculates the amplitude dispersion in the spectrum of frequencies of the combined signal and a device which measures the power thereof. On the basis of this information and an appropriate calculation strategy tending to minimize the BER of the equipment, a microprocessor generates signals for gain control of the stage RF of the receivers and for phase shift control for a phase shifter for the local oscillator signal sent to one of the receivers. The calculation strategy consists of minimizing a polynomial function of the power and dispersion values. Dependence of the BER on the fnotch characterizing the dispersion is eliminated, normalizing dispersion in relation to fnotch.
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