Two-dimensional Spread-spectrum Anti-jamming Wireless Transceiver Letter Machine-signal Design

With the rapid development of the technologiesof the large scale integration chips and digital signal processing, the wireless transceiver has been widely applied in the modern electronic systems from the 1980s. Meanwhile, the demand of its anti-interference alility and flexibility is rising.It can realize the confidentiality of information by using spread spectrum technology. When transimitting the low power spread spectrum signals which can be hidden in the background noise, the probability of interception by unknown listener is lowered. Besides, the integration of chips has been growing followed the Moore's Law. The chip system's cominig naro era greatly drives the development of the miniaturization of wireless communication.Based on spread spectrum technology and very large scale scale integrated circuit technology, this paper studies a two-dimensional spread spectrum and anti-jamming wireless transceiver.First, related literature about wireless transceiver is collected, which include the main use of spread spectrum, the deveplpment status of integrated circuit technology and the development of wireless transceiver.And then, taking the structure with single transmitter and sigle receiver for example, it gives the requirements analysis of two-dimensional spread spectrum and anti-jamming wireless transceiver including the functional requirements, the link parameters requirements of 300MHz, and the main non-functional requirements.Again, it gives the program of transmitter design including the block diagram of the transmitter design, the clock arrangement, and the work of timing of every sub-unit.Finally, it gives the algorithm design and simulation of the wireless transceiver, and the section 4.4.2 is emphasized on simulation and compare of the frequency offset estimation algorithms.A improved FFT algorithm based on center of gravity is selected.What's more, it gives the floating-point simulation of the whole link, and the bit error rate is about 0.001 when the SNR is -30dB.The two-dimensional spread spectrum and anti-jamming wireless transceiver in this paper meets the requirements of the development of modern electronic systems. The research fills the blank of domestic similar products, and it has cetain applied value.