Diversity receiver

Details Diversity receiver Diversity receiver

1992-12-22

1994-08-02

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

455132, 455137, 375 14, H04B 710, H04L 102

Patent

active

053352513

ABSTRACT:
A diversity receiver includes a first antenna and a second antenna. A first receiving section connected to the first antenna serves to convert a digital modulation wave induced at the first antenna into a first intermediate-frequency signal. A first band pass filter connected to the first receiving section serves to subject the first intermediate-frequency signal to a band pass filtering process. A second receiving section connected to the second antenna serves to convert a digital modulation wave induced at the second antenna into a second intermediate-frequency signal. A second band pass filter connected to the second receiving section serves to subject the second intermediate-frequency signal to a band pass filtering process. A switch alternately selects one of output signals of the first and second band pass filters at a period equal to a half of a period corresponding to the symbol rate. A quadrature demodulator connected to the switch serves to demodulate an output signal of the switch into quadrature baseband signals. An analog-to-digital converter connected to the quadrature demodulator converts the quadrature baseband signals into corresponding digital signals. A decision feedback adaptive equalizer connected to the analog-to-digital converter serves to subject the digital signals to an equalizing process.

REFERENCES:
patent: 4281411 (1981-07-01), Bonn et al.
patent: 4328585 (1982-05-01), Monsen
patent: 5065411 (1991-11-01), Muto
patent: 5200977 (1993-04-01), Ohnishi et al.
patent: 5203027 (1993-04-01), Nounin et al.
Ariyauisitakul, "A Decision Feedback Equalizer with Time-Reversal Structure," IEEE Journal on Selected Areas in Communications, vol. 10, No. 3, Apr. 1992 pp. 599-613.
Balaban, Philip, "Dual Diversity Combining & Equalization in Digital Cellular Mobile Radio," IEEE Trans. on Vech. Tech. vol. 40, No. 2, May 1991 pp. 342-354.

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