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

Inactive Publication Date: 2007-05-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the method disclosed in Patent Document 1, carrier synchronization is realized based on the in-phase component I and the quadrature component Q, so complex multiplication is required for phase correction of the received signal, and complex multiplication requires four multipliers, so there is The problem of increased circuit size
In addition, in the method disclosed in Patent Document 2, the phase θ is ob

Method used

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

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Embodiment Construction

[0056] Hereinafter, a PSK receiver and a PSK demodulation circuit according to an embodiment of the present invention will be described with reference to the drawings.

[0057] FIG. 1 is a block diagram showing the configuration of a BPSK receiver according to the first embodiment of the present invention.

[0058]In FIG. 1 , the wireless communication receiver is provided with: an antenna 101 for receiving quadrature-modulated radio waves; a low-noise amplifier 102 for amplifying a received signal received by the antenna 101; a PLL circuit 109 for generating a carrier wave; The phase shifter (phase shifter) 100 of the phase shift π / 2 of the carrier wave generated by 109; Mix the carrier wave shifted by π / 2 and the received signal amplified by the low noise amplifier 102, and extract the in-phase component I of the received signal mixer 103; mix the carrier generated by the PLL circuit 109 and the received signal amplified by the low noise amplifier 102, and extract the mixer ...

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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).

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

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Application Information

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IPC IPC(8): H04L27/14
Inventor 水上博光
Owner SEIKO EPSON CORP
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