Title:
ＯＦＤＭ変調波送信装置、ＯＦＤＭ変調波送信方法、及びプログラム
Document Type and Number:
Japanese Patent JP5871292
Kind Code:
B2
Abstract:
In an orthogonal frequency division multiplex (OFDM) modulated wave transmitter apparatus, a symbol mapping circuit and a serial/parallel (S/P) converter generate an OFDM symbol signal from transmission data. An inverse fast Fourier transform (IFFT) circuit, a parallel/serial (P/S) converting and guard interval (GI) adding circuit, a timing adjusting circuit, a digital/analog (D/A) converter, a frequency converter, a local oscillator and an analog filter generate an OFDM modulated wave signal from the OFDM symbol signal. A power amplifier (PA) control circuit limits a band of the OFDM symbol signal and generates a PS control signal and a PA control signal. A PA designates a voltage supplied from a DC/DC converter as a PS voltage and amplifies and outputs the OFDM modulated wave signal based on the PA control signal.
Inventors:
Takayuki Oga
Application Number:
JP2014220587A
Publication Date:
March 01, 2016
Filing Date:
October 29, 2014
Export Citation:
Assignee:
Lenovo Innovations Limited (Hong Kong)
International Classes:
H04J11/00; H03F1/02; H03F3/24; H04B1/04
Domestic Patent References:
| JP2002158635A | ||||
| JP2009177640A | ||||
| JP5677324B2 | ||||
| JP2007329539A | ||||
| JP2007150872A |
Foreign References:
| WO2008105409A1 |
Attorney, Agent or Firm:
Takao Maruyama