Title :
Additional data transmission with rotated QPSK constellation
Author :
Sungwon Hong ; Eun Su Kang ; Dong Seog Han
Author_Institution :
Kyungpook Nat. Univ., Daegu, South Korea
Abstract :
A quadrature phase-shift keying (QPSK) modulation scheme is proposed to improve the data rate using the rotated constellation. The additional data is not physically transmitted to improve the spectral efficiency, but it can be detected in the receiver through the rotated phases of constellations. In this Letter, the performance of the proposed transmission scheme is verified by simulation and mathematical analysis with the majority detection rule as the lower bound.
Keywords :
mathematical analysis; quadrature phase shift keying; QPSK modulation scheme; additional data transmission; data rate improvement; majority detection rule; mathematical analysis; quadrature phase-shift keying modulation scheme; rotated QPSK constellation; spectral efficiency improvement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.4488
