High-frequency receiving apparatus having wide frequency...

Details High-frequency receiving apparatus having wide frequency... High-frequency receiving apparatus having wide frequency...

2007-08-28

2007-08-28

Nguyen, Chau (Department: 2616)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Quadrature carriers

C375S326000

Reexamination Certificate

active

10315977

ABSTRACT:
A high-frequency receiving apparatus includes a phase pull-in circuit controlling an oscillator so as to eliminate a phase difference, a frequency pull-in circuit controlling the oscillator so as to eliminate a frequency difference, a frequency shift circuit shifting an oscillation frequency of the oscillator by a prescribed frequency when the frequency difference is large, and a control signal generation circuit controlling those circuits according to an algorithm selected from a plurality of algorithms corresponding to, for example, a symbol rate. Therefore, a wide range of frequency can rapidly be pulled regardless of the level of the symbol rate.

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