Wireless receiving and transmitting system based on long-term evolution (LTE)

A wireless transceiver system and long-term evolution technology, applied in the field of wireless transceiver systems, can solve problems such as weak anti-multipath interference, other user interference, lower data transmission rate, etc., to improve confidentiality and anti-interference ability, spread spectrum. Effect

Active Publication Date: 2015-04-08
WUXI TIANLU TECH
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Problems solved by technology

[0003] The spectrum spreading methods adopted by the LTE system mainly include the modulation spreading method based on the narrowband modulation technology and the modulation spreading method based on the pseudo-random sequence and phase shift keying. Among them, the modulation spreading method based on the narrowband modulation technology is kept secret. strong, but the ability to resist multipath interference is w...

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  • Wireless receiving and transmitting system based on long-term evolution (LTE)
  • Wireless receiving and transmitting system based on long-term evolution (LTE)
  • Wireless receiving and transmitting system based on long-term evolution (LTE)

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Embodiment approach

[0103] According to an embodiment of the present invention, the S1 specifically includes:

[0104] S1-1: The in-phase pseudo-random phase-shift keying spreading sequence generator and the orthogonal pseudo-random phase-shift keying spreading sequence generator of the source modulator generate the in-phase pseudo-random phase-shift keying spreading sequence and the orthogonal pseudo-random phase respectively Shift keying extension sequence;

[0105] S1-2: The narrowband modulation sequence generator of the source modulator generates a narrowband modulation pseudo-random sequence;

[0106] S1-3: The multiplexing unit of the source modulator multiplexes the transmission data to obtain in-phase data and quadrature data;

[0107] S1-4: The pseudo-random phase-shift keying spreading despreading unit of the source modulator uses the in-phase pseudo-random phase-shift keying spreading sequence and the orthogonal pseudo-random phase-shift keying spreading sequence to pair the in-phase...

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Abstract

The invention discloses a wireless receiving and transmitting system based on long-term evolution (LTE). The wireless receiving and transmitting system based on LTE comprises an LTE transmitting unit and an LET receiving unit, wherein the LTE transmitting unit comprises a signal source modulator, a first frequency converter, a first digital frequency synthesizer, a first phase-locked loop synthesizer, a transmission radiofrequency front end and a first MIMO (Multiple Input Multiple Output) antenna array, wherein the LTE receiving unit comprises a second MIMO antenna array, a receiving radiofrequency front end, a second frequency converter, a third frequency converter, a second phase-locked loop synthesizer, a second digital synthesizer, a medium-frequency filter, an AD (Analog to Digital) converter and a signal source revolving unit. A two-layer frequency spectrum expansion mechanism is adopted, and different expansion sequences can be adopted in each layer of expansion, so that the frequency spectrum of a whole communication system is extended greatly, and the security and interference resistance of the system are enhanced.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a long-term evolution-based wireless transceiver system. Background technique [0002] LTE (Long Term Evolution) is a long-term evolution of the UMTS (Universal Mobile Telecommunications System) technical standard formulated by 3GPP (Third Generation Partnership Project). It was officially established and launched at the 3GPP Toronto TSGRAN#26 meeting in December 2004. The LTE system introduces key transmission technologies such as OFDM (Orthogonal Frequency Division Multiplexing) and MIMO (Multiple Input Multiple Output), which significantly increases the spectral efficiency and data transmission rate (20M bandwidth 2X2MIMO in the case of 64QAM, the theoretical maximum transmission rate of the downlink is 201Mbps, about 140Mbps after excluding signaling overhead, but according to actual networking and terminal capability limitations, it is generally believed that the peak r...

Claims

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Application Information

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IPC IPC(8): H04B7/04H04L27/26
CPCH04B7/0413H04L27/206
Inventor 朱今兰
Owner WUXI TIANLU TECH
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