Phase detection circuit and receiver

Details Phase detection circuit and receiver Phase detection circuit and receiver

2005-06-07

2005-06-07

Shingleton, Michael B. (Department: 2817)

Demodulators

Pulse or interrupted continuous wave demodulator

Pulse position, frequency, phase or spacing demodulator

C329S306000, C329S343000, C455S205000, C455S209000, C455S214000

Reexamination Certificate

active

06903603

ABSTRACT:
A quadrant deciding section decides the quadrant to which a received signal belongs based on a baseband signal. A rotation projector rotates the received signal and projects the rotated signal to a straight line that intersects orthogonally at the origin with a straight line that bisects the decided quadrant. An integrator integrates the signal after the projection. A one-bit quantizer quantizes the integration result by deciding the sign of the integration result. A delay circuit delays the quantized signal by a predetermined time. An adder adds the decision result and the quantized signal modulo the phase 2π. A low-pass filter sequentially latches phase values after the addition with internal shift registers, converts the phase value to a prescribed specific value when the phase values that cross over 2π exist in the whole data within the registers, and averages the phase values.

REFERENCES:
patent: 5517689 (1996-05-01), Hayashihara
patent: 6775530 (2004-08-01), Severson et al.
patent: 6-77737 (1994-03-01), None
patent: 8-97875 (1996-04-01), None
Mikio Hayashibara et al.: “Delta Sigma hencho gijutsu o mochiita iso kensyutsu hosiki to FM fukuchoki heno oyo” Shunki Convention Record, the Institute of Electronics, Information and Communication, “2 Tsushin Electronics”, vol. 1994, pp. 2-368, Mar. 1994(With English Translation).
Ryoji Hayashi et al.: “Delta Sigma gata iso kenshutsuki niyoru PSK/FSK singo no jushin tokusei” National Convention Record, the Institute of Electronics, Information and Communication, “Tsushin 1”, vol. 2001, p. 569, Mar. 2001(With English Translation).
Ryoji Hayashi et al. “Delta Sigma iso kenshutsuki niyoru PSK/FSK singo no jusin tokusel” Gijutsu Kenkyu Hokoku RCS 2001-203-224, the Institute of Electronics, Information and Communication, vol. 101, No. 544, pp. 151-158, Jan. 2002, (With English Abstract).
Akira Yukawa: “Over-sampling A-D conversion technique” Nikkei Business Publications, Inc., 3.2.2,3.3.2-3.3.3 Dec. 25, 1990 (with English translation).

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