Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1995-05-16
1998-06-02
Tse, Young T.
Pulse or digital communications
Receivers
Interference or noise reduction
375349, 455133, H04B 708
Patent
active
057612528
ABSTRACT:
A diversity reception device which weights in proportion to the reception level and combines a plurality of reception signals, includes a phase demodulator for demodulating the phase of the reception signal, a converter to output the sine and cosine elements of the reception signal, a sine element adder to add up sine element of each reception signal, and a cosine element adder to add up cosine element of each reception signal. The converter fetches and outputs predetermined values on sine and cosine elements of the reception signal upon input of the reception signal's reception level and phase data that is sent from phase demodulator. Therefore, the present device does not require expensive electronic circuits and can be made of small digital circuits suitable for IC including a memory.
REFERENCES:
patent: 5280637 (1994-01-01), Larosa et al.
patent: 5321850 (1994-06-01), Backstrom et al.
patent: 5461646 (1995-10-01), Anvari
patent: 5465271 (1995-11-01), Hladik et al.
"High Frequency Closed-Space Diversity Antenna with Nulling Capability," William C. Y. Lee, et al., AP-S International Symposium 1985; Antennas and Propagation, Symposium Digest, Vancouver, BC, Jun. 1985, pp. 801-804.
"Postdetection Phase Combining Diversity," Masaharu Ikura, et al., IEEE Transactions on Vehicular Technology, May 1994, vol. 43, No. 2, pp. 298-302.
Sanyo Electric Co,. Ltd.
Tse Young T.
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