Multiple Access Method Based On Compressed Sensing

An efficient multiple access method can improve the throughput and avoid the collision.The traditional method,such as CSMA/CD has low transmission efficiency and throughput.A multiple access method based on compressed sensing is proposed in this thesis.Compressed sensing(CS)is a technique for sampling and compressing signals.Compressed sensing is imported into multiple access in this thesis.Wireless transmission matrix is selected as sensing matrix to improve the flexibility of the system.The basis pursuit(BP)algorithm can be used to reconstruct the signal.From the aspect of transmission accuracy rate and throughput capacity,the proposed scheme provides better performance than CSMA/CD scheme.Then,In traditional multi-hop transmission scheme,the intermediate node just forward the received data of the previous node or send the data of intermediate node behind the revived data directly.A novel multi-hop data transmission scheme based on the compressed sensing theory is proposed to improve the low transmission efficiency.The data of multi-hop node can be added to the data of the previous node and transmitted to the next node.This method can realize high transmission efficiency without extending the length of the packet.Compared with the traditional multi-hop transmission scheme,the proposed scheme can improve the transmission efficiency.Based on the common software radio wireless platform,the experiment is implemented to evaluate the performance of the proposed schemes.The results show that the proposed multiple access method based on compressed sensing can improve the transmission efficiency and reliability.