FCC recently issued regulatory rules for the reuse of the underutilized TV white space spectrum without negative impact on digital television broadcasts. Cognitive Radio techniques are of great importance to ac- quire...
supported in part by the National "973" Program of China (No. 2011CB301702);the National Natural Science Foundation of China (No. 61001121,61006041, 60736036, and 60932004);the Fundamental Research Funds for the Central Universities
We present a novel coherent transceiver for optical differential phase-shift keying/differential quadrature phase-shift keying (DPSK/DQPSK) signals based on heterodyne detection and electrical delay interferometer. ...