Title :
A new SNR´s estimator for QPSK Modulations in an AWGN channel
Author :
Ren, Guangliang ; Chang, Yilin ; Zhang, Hui
Author_Institution :
Nat. Key Lab. of ISN, Xidian Univ., Xi´´an, China
fDate :
6/1/2005 12:00:00 AM
Abstract :
Signal-to-noise ratio (SNR) measurement is required in many receivers and systems of communications. In this brief, we derive a new SNR´s estimator based on the second and fourth-order moments of the complex signals of quadrature phase-shift keying modulations. The mean square error of the estimated SNR by the proposed algorithm is smaller than that by other methods for a low SNR with limited samples.
Keywords :
AWGN channels; mean square error methods; noise measurement; quadrature phase shift keying; telecommunication; AWGN channel; fourth-order moments; mean square error; quadrature phase-shift keying modulations; second-order moments; signal-to-noise ratio estimation; AWGN channels; Additive white noise; Gaussian noise; Mobile communication; Phase estimation; Phase modulation; Phase shift keying; Quadrature phase shift keying; Satellite communication; Signal to noise ratio; Quadrature phase-shift keying (QPSK); second- and fourth-order moment; signal-to-noise ratio (SNR) estimation;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2005.849008
