PSK receiver, PSK demodulating circuit, communication apparatus, and PSK receiving method

A technology for receiving and receiving signals, which is applied in the direction of frequency modulation carrier system, etc., and can solve the problem of circuit scale becoming larger
CN1972262AInactive Publication Date: 2007-05-30SEIKO EPSON CORP
1 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SEIKO EPSON CORP
Publication Date
2007-05-30
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a PSK receiver and a receiving method thereof, a PSK demodulating circuit and a communication apparatus, which can restrain the increase of the circuit scale and perform demodulation on phase modulated signals. As a solving means, an in-phase component (I) and an quadrature component (Q) contained in a reveived signal are converted to a 1-bit digital signal by 1-bit A / D converters (107, 108) respectively, when a phase point distance I-axes determined by the in-phase component (I) and the quadrature component (Q) is used as a predetermined region, a BPSK demodulator (110a) demoluates the received signal only according to the in-phase component (I), and when a phase point distance Q-axes determined by the in-phase component (I) and the quadrature component (Q) is used as a predetermined region, the BPSK demodulator (110a) demoluates the received signal only according to the quadrature component (Q).
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a kind of PSK (Phase Shift Keying, phase-shift keying) receiver and its receiving method, PSK demodulation circuit and communication device, especially relate to the in-phase (in phase) that is suitable for being converted into 1 bit digital signal Component I and Quadrature Component Q demodulation techniques. Background technique

[0002] As a method of performing semi-synchronous detection (semi synchronous detection) in PSK demodulation, there is a method of performing carrier synchronization and demodulation based on the received in-phase component I and quadrature component Q (Patent Document 1). The method of applying the following formula (1) to the component I and the quadrature component Q to obtain the phase θ and perform carrier synchronization for demodulation (Patent Document 2).

[0003] θ=tan-1(I / Q)...(1)

[0004] Patent Document 1 Japanese Patent Application Laid-Open No. 2001-24726

[0005] Patent D...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More