Cramer-Rao bounds of SNR estimates for BPSK and QPSK modulatedsignals |
| |
Authors: | Alagha N.S. |
| |
Affiliation: | EMS Technol. Canada, STe-Anee-de-Bellevue, Que. ; |
| |
Abstract: | We derive Cramer-Rao lower bounds (CRLBs) for the estimation of signal-to-noise ratio (SNR) of binary phase-shift keying (BPSK) and quaternary phase-shift keying (QPSK) modulated signals. The received signal is corrupted by additive white Gaussian noise (AWGN). The lower bounds are derived for non-data-aided estimation where the transmitted symbols are unknown at the receiver. The bounds are compared to those for data-aided estimations (known symbols at the receiver). It is shown that at low SNR there is a significant difference between the bounds for non-data-aided and data-aided estimations |
| |
Keywords: | |
|
|