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.