A Technology of Channel Coexistence in Cognitive Radio Based on Spread Spectrum-Composite Sequence-Code Shift Keying
Lili Guo · Techniques of Automation and Applications · 2013
The technology of DSSS(Direct Sequence Spread Spectrum)realize the signal spectrum features what can be controlled the coexistence between cognitive users and authorized users,and improve the spectrum utilization.In the cases of less idle frequencies band,using CSK(Code Shift Keying) can achieve different spectrum sequences for M-ary transfers.