Detector and receiving and transmitting apparatus

Details Detector and receiving and transmitting apparatus Detector and receiving and transmitting apparatus

1996-02-07

1998-07-28

Chin, Stephen

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

375324, 375329, 329306, H04L 2722

Patent

active

057871264

ABSTRACT:
The detector comprises a first distributor for distributing a signal wave, a 45 degree shifter for shifting a local oscillation, a first even harmonic mixer and a second even harmonic mixer for generating a mixed wave between a double frequency wave of said local oscillation wave and said signal wave. The present invention can be used for increasing the accuracy and downsizing of quadrature mixer used in a receiving transmitting apparatus of a wireless communication system.

REFERENCES:
patent: 5303417 (1994-04-01), Laws
patent: 5361408 (1994-11-01), Watanabe et al.
patent: 5436931 (1995-07-01), Minami
patent: 5446762 (1995-08-01), Ohba et al.
patent: 5550869 (1996-08-01), Gurantz et al.
Philips Journal of Research "Some Features of Signal Demodulation Resulting From the Practical Implementation of a Direct Conversion Radio Receiver", vol. 41, No. 3, 1986.
Journal of the Institute of Electronics, Information and Communication Engineers, "A Direct Conversion Receiver Employing a Frequency Multiplied Digital Phase-Shifting Demodulator", Nov. 1993.

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