Wireless communication device based on common application of OFDM and SC_FDE

A baseband signal and signal technology, applied in a variety of modulation transmitter/receiver arrangements, digital transmission systems, electrical components, etc., can solve the problems of low power amplifier efficiency, short transmission distance, low data rate, etc., to achieve stable and reliable performance. , reduced complexity, small size effect

Active Publication Date: 2015-03-04
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

If the communication equipment adopts the SC_FDE mode, the data rate is low at short distances; if it adopts the OFDM mode, the power amplifier efficiency is low at long distances, and the transmission distance is short

Method used

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  • Wireless communication device based on common application of OFDM and SC_FDE
  • Wireless communication device based on common application of OFDM and SC_FDE

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Embodiment Construction

[0014] refer to figure 1 , the present invention is made up of antenna 1, power amplifier unit 2, frequency conversion and filtering unit 3, baseband processing unit 4, service data interface unit 5, reception level estimation unit 6 and modulation mode selection unit 7, figure 1 It is an electric principle block diagram of the present invention, and the embodiment is according to figure 1 Connect the lines.

[0015] Service data interface unit 5 receives the service data of external input and carries out framing process to service data; Modulation mode selection unit 7 outputs mode selection signal; Baseband processing unit 4 generates baseband signal with the received framed service data, baseband signal The selection is made by the mode selection signal; the frequency conversion and filtering unit 3 mixes the received baseband signal to generate a radio frequency signal; the power amplifier unit 2 amplifies the power of the radio frequency signal, and the antenna 1 sends t...

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Abstract

The invention discloses a wireless communication device based on common application of OFDM (Orthogonal Frequency Division Multiplexing) and SC_FDE (Single Carrier Frequency Domain Equalization). The wireless communication device consists of an antenna, a power amplifier unit, a frequency conversion and filter unit, a business data interface unit, a baseband processing unit, a reception level estimation unit and a modulation mode selection unit. According to the wireless communication device, the problem between communication distance and data rate in the wireless communication is solved, the low-speed reliable communication at a long distance is realized and the high-speed data transmission at a close distance is realized; and the wireless communication device has the advantages of high degree of integration, high equipment reliability and strong communication capacity and has wider application prospect in practical engineering.

Description

technical field [0001] The present invention relates to a wireless communication device, in particular to a wireless communication device based on the common application of OFDM and SC_FDE. Background technique [0002] There is usually only one modulation mode in existing communication equipment, OFDM or SC_FDE mode. In wireless communication, due to the fast signal attenuation, in order to ensure long-distance reliable communication, wireless communication equipment usually has high power amplifier efficiency and low transmission rate, and SC_FDE mode is often used; in short-distance communication, due to the high utilization rate of OFDM spectrum, transmission The rate is high, and the OFDM mode is often used. If the communication equipment adopts the SC_FDE mode, the data rate is low at short distances, and if it adopts the OFDM mode, the power amplifier efficiency is low at long distances, and the transmission distance is short. Contents of the invention [0003] Th...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B1/401
CPCH04B1/401H04L27/0008H04L27/2601
Inventor 李晓晗
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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