BS digital broadcasting receiver

Details BS digital broadcasting receiver BS digital broadcasting receiver

2006-01-31

2006-01-31

Ghebretinsae, Temesghen (Department: 2637)

Pulse or digital communications

Receivers

Angle modulation

C375S279000, C329S304000

Reexamination Certificate

active

06993096

ABSTRACT:
A BS digital broadcasting receiver which eliminates the uncertainty of an ODU's phase noise-dependent switching point when switching a receiving system. The receiver is provided with a demodulator circuit (6A) having a carrier regenerating circuit (19A) based on demodulation data in a BPSK modulation section, and with a demodulator circuit (6B) having a carrier regenerating circuit (19B) based on demodulation data in each time-division modulation section, wherein, when a lock for carriers regenerated by the carrier regenerating circuit (19A) is maintained and carriers regenerated by the carrier regenerating circuit (19B) is locked, demodulation data, in the BPSK demodulation section and a QPSK demodulation section, output from the demodulator circuit (6A) and 8-PSK-modulated demodulation data output from the demodulator circuit (6B) are selected by a selector (7) for outputting.

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Combarel et al., “HD-SAT Modems for the Satellite Broadcasting in the 20 GHz Frequency Band,” 8087 IEEE Transactions on Consumer Electronics, 41 (Nov. 1995), No. 4, New York, US, pp. 991-999.
Sundberg et al., “Hybrid Trellis-Coded 8/4-PSK Modulation Systems,” 8089 IEEE Transactions on Communications 38 (May 1990), No. 5, New York, US, pp. 602-613.
International Search Report dated Jul. 21, 2000.

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